Anthropic builds the Claude family of AI assistants. We track their model releases, pricing updates, API changes, safety policy updates, and infrastructure incidents.
Anthropic engineering post updates model cards for Opus 4.6 and Sonnet 4.6 (eval-awareness findings)
Anthropic published an engineering write-up describing Eval awareness observed in Claude Opus 4.6 on the BrowseComp benchmark and noted contamination and novel behaviors. The post states they updated the model cards for Opus 4.6 and Sonnet 4.6 and documents mitigations taken (e.g., blocklisting certain search results) and adjusted reported scores where contamination was found.
Community reports of localized Max-plan price increases / billing anomalies (unverified)
Multiple community threads report apparent plan/billing anomalies (for example, users reporting a Max plan price shown as ÂŁ124.99 in the UK where they previously saw ~ÂŁ75/month). These reports are from users and community forums; I did not find a corresponding official pricing announcement on Anthropic/Claude documentation during the checks performed.
Claude pricing docs updated with per-model token rates, prompt-caching, batch & fast-mode pricing
Anthropic’s Claude pricing documentation (platform.claude.com/docs/en/about-claude/pricing) was updated to include explicit per-model token rates for recent model releases (Opus 4.6, Sonnet 4.6, Haiku 4.5 and others), detailed prompt-caching multipliers (5-minute and 1-hour writes; cache read = 10% of input), batch API 50% discounts, fast-mode premium rates, and a 1.1x data-residency multiplier for US-only inference. The page also documents tool-specific pricing (web search, code execution), long-context billing rules and usage-tier rate-limit guidance. No explicit effective date is shown on the page.
Claude public pricing page updated with per-model token rates, prompt-caching, batch and tool pricing
The public Claude pricing page (https://claude.com/pricing) was updated to include explicit per-model token rates for new models (Opus 4.6, Sonnet 4.6, Haiku 4.5 and others), prompt-caching write/read rates, a 50% savings message for batch processing, tool-specific pricing (web search $10/1K searches; code-execution additional hours at $0.05/hr after free allotment), and a 1.1x US-only inference multiplier. The page also documents service tiers (Priority, Standard, Batch) and references detailed pricing on platform docs. No clear effective date is shown on the page.
Claude pricing page expanded — added payment options, model/token pricing, and explicit 'price and plans are subject to change' language; clarifies subscriptions won’t cover third‑party agent usage
The main Claude pricing page has been expanded with more detailed billing and pricing information: it now lists payment options (credit card, ACH, invoicing/net terms), billing cycle notes, seat/Team/Enterprise pricing mechanics (seats + API-rate usage for Enterprise), references to model/token pricing and service tiers (priority/standard/batch), and an explicit statement that "Price and plans are subject to change at Anthropic's discretion." The page also contains clarifying language that subscriptions do not cover heavy continuous usage from third‑party agent frameworks and points users toward extra-usage bundles or API keys. These additions consolidate billing, usage-tier, and model-pricing details previously scattered across pages.
Degraded performance on Vaults — Apr 10, 2026 (resolved)
Anthropic added an Apr 10, 2026 incident titled “Degraded Performance on Vaults” to the status page. The timeline shows Investigating → Monitoring → Resolved with a fix implemented and monitoring in place. The entry indicates degraded Vault performance impacting that product surface during the incident window.
Anthropic Claude: elevated errors and authentication issues reported and resolved (Apr 7–8, 2026)
Anthropic posted incident history showing elevated errors on Claude.ai and related product surfaces on April 7–8, 2026 (authentication/login errors affecting web, mobile, platform.claude.com, and /login attempts via Claude Code). The April 8 authentication issue was reported as investigated and resolved (timestamps shown on the status page).
Anthropic: Elevated errors affecting Claude services and workspace creation (Apr 7–8, 2026) — investigated and resolved
Anthropic’s public status page records multiple elevated-error incidents affecting Claude services and workspace creation across Apr 7–8, 2026. The incidents were investigated, mitigations deployed, and the issues were resolved with monitoring status updates posted on the status page.
Anthropic published a status incident titled “Sonnet 4.6 elevated rate of errors” on their status page with Investigating → Identified updates on Apr 8, 2026. The incident notes elevated error rates impacting Sonnet 4.6 and related Claude services and lists partial outage / degraded performance for some services while a fix is implemented.
Anthropic’s public status page shows a new incident on Apr 8, 2026: "Sonnet 4.6 elevated rate of errors." The incident timeline shows Investigating → Identified → Monitoring → Resolved with timestamps on Apr 8 (fix implemented and monitoring at 09:33 UTC). The entry notes Sonnet 4.6 exhibited errors above baseline between ~07:00–09:50 UTC and that a fix was applied.
Anthropic reports Sonnet 4.6 elevated rate of errors (Apr 08, 2026) on status page
Anthropic's status page shows an incident titled "Sonnet 4.6 elevated rate of errors" with Investigating/Identified updates on 2026-04-08 (timestamps show investigation beginning at 06:23–07:06 UTC and an Identified entry at 07:59 UTC). The incident was active on the status page at the time of collection and was listed among recent/past incidents for April 8, 2026.
Claude Mythos Preview System Card published — Apr 7, 2026 (restricted partner access)
Anthropic published a System Card for "Claude Mythos Preview" dated April 7, 2026. The card describes Mythos Preview as a large jump in capability relative to prior frontier models and states Anthropic will not make it generally available; access is restricted to a small set of vetted partners for defensive cybersecurity use (Project Glasswing). The card documents detailed capability and safety evaluations and explains the RSP v3.x release decision.
Major outage impacting Claude and Claude Code — Apr 7, 2026 (resolved)
Multiple news outlets reported a major outage affecting Claude (including Claude Code and Claude.ai) on Apr 7, 2026. Anthropic’s status message said a fix was applied and success rates returned to normal; the company continues to monitor. The outage impacted access for many users for a limited period before being resolved.
Elevated login/errors on Claude.ai and Claude Code — Apr 6, 2026 (resolved)
Anthropic’s status records (and subsequent reporting) indicate an elevated‑error/login incident affecting Claude.ai and Claude Code on Apr 6, 2026; the issue impacted logins and some conversation/voice functionality and was resolved. The event was visible on the status page and noted in press coverage summarizing the outage.
Anthropic’s status page reports incidents on Apr 6: elevated error rates for Sonnet 4.6 and elevated errors affecting Claude.ai login and some product functionality; the issues were investigated and later marked resolved the same day.
Anthropic status updated to All Systems Operational; Sonnet 4.6 incident listed as resolved (Apr 06, 2026)
Anthropic’s status page was updated to show All Systems Operational and the previously-reported “Sonnet 4.6 elevated rate of errors” entry is listed in Past Incidents as resolved (status page lists a resolution timestamp of Apr 6, 2026). The public incident entry that appeared earlier is no longer active on the status page.
Claude pricing page updated — Pro plan/clarifications added; agent usage separated from subscription
The canonical Claude pricing page (https://claude.com/pricing) shows a content update compared with the prior scrape: site navigation and plan sections were modified and references to a 'Pro' plan and clarifying language about how third‑party tools draw from subscription versus extra usage were added. The change aligns with reports that agent usage is being moved off subscription allowances.
Anthropic requires extra payment or moves to per‑token billing for Claude usage via third‑party agent tools
News outlets and community reports from April 4, 2026, indicate Anthropic implemented a policy/billing change that excludes or reclassifies usage routed through third‑party agent frameworks (notably OpenClaw and similar tools) from Pro/Max subscription coverage. That usage is being moved to per‑token/API billing or requires purchasing separate usage bundles, meaning subscribers can face substantially higher costs or different quota treatment when running agentized workflows.
Anthropic disallows using subscriber limits for third-party tools (OpenClaw); separate billing begins Apr 4, 2026
Anthropic changed how subscriber plan usage applies to third-party harnesses (notably OpenClaw): starting Apr 4, 2026 subscribers may no longer use their Claude subscription limits for third-party tools and must instead use a separate pay-as-you-go billing option or discounted usage bundles. Anthropic communicated a one-time credit equal to the monthly plan cost for subscribers and directed users to alternative billing (API keys or bundles) and refund requests where applicable.
Elevated errors on requests to Claude Sonnet 4.6 (resolved) — Apr 3, 2026
Anthropic's public status indicated an incident on Apr 3, 2026 reporting elevated errors on requests to Claude Sonnet 4.6; the incident was investigated and marked resolved the same day (times in logs indicate investigation beginning ~18:12 UTC and resolution at ~19:21 UTC).
Critical vulnerability discovered in leaked Claude Code after source leak
Security reporting indicates that after the accidental release/leak of Anthropic's Claude Code client/source artifacts, a critical vulnerability was discovered in those artifacts that could enable prompt-injection or other attack vectors. This follows earlier takedown/DMCA activity to remove leaked copies. Anthropic has stated no customer data was exposed in the leak but follow-on analysis identified vulnerabilities in the leaked code.
Anthropic accidental Claude Code exposure and DMCA takedown activity
Multiple publications report that Anthropic accidentally included a source map / client file that exposed large portions of the "Claude Code" client code. Anthropic initiated large-scale takedown/DMCA requests to remove copies, and later acknowledged some takedowns affected legitimate forks; Anthropic stated no sensitive customer data were exposed.
Claude API/model errors and desktop connector outages recorded and resolved (Apr 1, 2026)
Anthropic’s public status page lists incidents on Mar 31–Apr 1 that caused elevated errors and timeouts for Claude models (Opus 4.6, Sonnet 4.6, Haiku 4.5) and temporary unavailability of some desktop connectors; the status entries show these incidents were investigated and later resolved.
Multiple Claude incidents: elevated errors/timeouts on Opus & Sonnet and Claude.ai desktop error (2026-04-01)
Anthropic's public status page shows multiple incident updates on 2026-04-01: elevated errors and timeouts affecting Claude Opus 4.6 and Sonnet 4.6 (timeout window reported from 2026-03-31 17:45 UTC to 2026-04-01 05:52 UTC) and a separate desktop application connection error reported and resolved on 2026-04-01. All incidents were marked resolved in follow-up updates. The status page entries list Identified -> Monitoring -> Resolved timeline entries and recommend monitoring for any continuing impact.
Claude Code source leak and takedown actions reported (late Mar 31–Apr 1, 2026)
Multiple reputable news outlets reported that Anthropic accidentally leaked a large portion of Claude Code source (hundreds of thousands of lines/files) around 2026-03-31/2026-04-01 and subsequently issued widespread takedown requests to remove copies from public mirrors. Anthropic stated the exposure was due to human error and (per coverage) indicated no customer credentials were exposed while the company pursued removal and remediation.
Developers report Claude Code users hitting usage/quotas far faster than expected (2026-04-01)
Multiple reports (developer news sites and community reporting) indicate Claude Code users and subscribers began hitting usage/quota limits much faster than expected as of early April 2026. Coverage describes customers on subscription tiers encountering rapid exhaustion of allotted usage and Anthropic acknowledging elevated usage/limit behavior in some contexts.
Anthropic source-code leak for Claude Code reported (Apr 1, 2026)
Multiple news outlets reported that Anthropic accidentally exposed source code for its Claude Code product in a packaging/debug file that was published publicly. Anthropic acknowledged the issue as a human/packaging error and pursued takedowns; reporting indicates the company stated no customer data or credentials were exposed.
Elevated errors on Claude Opus 4.6 reported and resolved (2026-03-31)
Anthropic's public status page reports an incident on 2026-03-31: elevated error rates impacting Claude Opus 4.6. The incident was investigated and later marked resolved (updates show Investigating -> Monitoring -> Resolved, with resolution noted at 09:44 UTC).
Developers report Claude Code users hitting token/session limits and overages in late March/early April
Multiple developer reports and a news write-up describe Claude Code subscribers hitting usage/quotas unexpectedly and experiencing overages in late March / early April 2026. Users reported rapid consumption of session/token allotments and billing/limit surprises; coverage indicates the problem affected some Max-plan subscribers and intensified during peak windows.
Anthropic accidental Claude Code source-map exposure in npm package (Mar 31, 2026)
Multiple news outlets reported that Anthropic accidentally published a Claude Code npm package that included a source map exposing original source code. Anthropic acknowledged the exposure in coverage, describing it as a packaging mistake; reports indicate no confirmed customer-data breach but the proprietary code was exposed publicly until removed.
Claude Code v2.1.88 released (2026-03-30) — opt-in flicker-free rendering and multiple fixes
The anthropics/claude-code repository published release v2.1.88 on 2026-03-30. The release adds CLAUDE_CODE_NO_FLICKER=1 (opt-in flicker-free alt-screen rendering), a PermissionDenied hook (with retry guidance), named subagents in mention typeahead, and a broad set of reliability/UX bug fixes (including prompt-cache, streaming/error messaging, memory leaks, and tool/integration fixes).
Claude Code v2.1.87 released (2026-03-29) — fixes Cowork/Dispatch message delivery
The anthropics/claude-code repository published a new release entry (v2.1.87) on 2026-03-29. The release notes state it fixes messages in Cowork Dispatch not being delivered and includes reliability/UX fixes that align with recent SDK/agent parity work.
Claude Desktop Dispatch sessions stopped responding (resolved) — update to 1.1.9493
Anthropic's public status page reports a Dispatch-related incident on 2026-03-29 where Dispatch sessions in the Claude Desktop app stopped responding. The incident was identified and resolved; the status message instructs affected users to update the Claude Desktop app to version 1.1.9493 and notes Cowork sessions are unaffected as a workaround.
Claude Agent SDK (TypeScript) updates (late Mar 2026) — new methods, session_id optional, parity bumps
Anthropic published a sequence of TypeScript Claude Agent SDK releases in late March 2026 (notably v0.2.85 on 2026-03-26 and v0.2.86 on 2026-03-27). The releases add SDK methods (eg. reloadPlugins(), getContextUsage()), make session_id optional for SDKUserMessage, introduce parity changes with Claude Code, and include various bug fixes and type/dependency updates.
Anthropic acknowledges adjusted Claude Code 5‑hour session limits during peak hours
Anthropic publicly acknowledged the issue and said it adjusted Claude Code’s 5‑hour session limits during peak hours to manage demand. The company said weekly limits remain unchanged and estimated roughly 7% of users will hit the more aggressive session limits; affected windows are weekdays 5am–11am PT (1pm–7pm GMT).
Claude Code v2.1.86 released (2026-03-27) — adds X-Claude-Code-Session-Id header and reliability fixes
anthropics/claude-code published release v2.1.86 (2026-03-27) which includes changes such as adding an X-Claude-Code-Session-Id header to API requests and a variety of reliability and UX fixes; the release notes indicate parity work with agent/SDK updates.
Forbes reports Claude Code pricing/usage bug burning through developer allotments
Multiple developer reports and a Forbes article (Mar 26, 2026) describe a pricing/usage bug in Claude Code where users' monthly/session usage allotments were consumed far faster than expected. Reports indicate some accounts saw their 5-hour session limits or paid-plan balances depleted in minutes to hours. There is no clear, dated Anthropic official announcement or corrected billing effective date in the sources found.
Claude Code v2.1.84 released (2026-03-26) — tooling, env vars, hooks, and fixes
The anthropics/claude-code GitHub releases show v2.1.84 published on 2026-03-26 with multiple changes: new PowerShell tool opt-in preview, environment variables to override model detection, streaming idle timeout configuration, new hook events, a new header for debugging, VSCode rate-limit banner, many bug fixes and improvements.
Claude Code v2.1.85 released (2026-03-26) — env vars, hook improvements, OAuth discovery, and fixes
The anthropics/claude-code repository published a new release (v2.1.85) on 2026-03-26 that adds MCP environment variables (CLAUDE_CODE_MCP_SERVER_NAME and CLAUDE_CODE_MCP_SERVER_URL), conditional hook filtering, timestamp markers for scheduled tasks, deep link length changes, RFC 9728 discovery for MCP OAuth, plugin/managed-settings behavior changes, and many fixes and improvements.
Claude service incident (2026-03-26 to 2026-03-27) — elevated error rates and throttling reported
Public reporting and status updates indicate a service incident on March 26–27, 2026 that caused elevated error rates and throttling for Claude (reports reference Opus 4.6 and session limits). Anthropic published a retrospective/updates on the outage via status channels.
Claude Agent SDK (TypeScript) updates (Mar 2026) — taskBudget, enableChannel, parity with Claude Code
Anthropic published multiple updates to the TypeScript Agent SDK (releases v0.2.76 through v0.2.84 in March 2026, with v0.2.84 published 2026-03-26) adding features such as taskBudget, enableChannel()/McpServerStatus capabilities, exported EffortLevel type, and various fixes to parity with Claude Code releases.
Support release notes updated — Computer-use preview (Mar 23) and Interactive apps (Mar 25, 2026)
Anthropic updated the Claude support release notes with new feature entries: March 23 (computer-use research preview in Cowork and Claude Code plus Dispatch improvements) and March 25 (interactive apps support in Claude mobile). The release-notes page was updated to document these capabilities and link to detailed articles.
Elevated errors on Claude.ai [retroactive] (brief elevated error rate)
Anthropic published a retroactive incident for elevated errors on Claude.ai (resolved) that occurred on 2026-03-23; the incident timeline shows a brief period of elevated error rates and a resolution. The status page indicates the Claude API was not affected for that incident window.
Anthropic posted a status incident on Mar 19, 2026 reporting elevated error rates affecting Claude Opus 4.6 across web and API surfaces (claude.ai, api.anthropic.com, platform.claude.com, and Claude Code). The status timeline shows Investigating at 15:59 UTC and Resolved at 16:14 UTC after fixes were implemented and monitoring continued.
Elevated errors observed on Claude Opus 4.6 (2026-03-19)
Community and status posts reported elevated errors on Claude Opus 4.6 on 2026-03-19 (reports surfaced via automated status posts and user reports). The incident indicates transient reliability issues affecting Opus 4.6 responses during that window.
Multiple reports and a status incident reported elevated errors and partial outages for Claude services on March 17–18, 2026. Users and media (Downdetector, news sites, and community posts) reported disruption; Anthropic posted status updates pointing to elevated error rates and mitigation work.
Multiple March 2026 Claude product updates (Cowork, visuals, Office integrations, memory for free users)
Anthropic support release notes for March 2026 list several product updates: (Mar 17) Cowork persistent thread control on mobile (Pro/Max preview); (Mar 12) interactive charts/visualizations in responses; (Mar 11) improved Excel and PowerPoint integrations; (Mar 02) memory available for free users. These are documented on Anthropic's release notes page.
Anthropic removes long-context surcharge — 1M-token contexts billed at standard per-token rates
Anthropic removed its previous long-context surcharge for Claude Opus 4.6 and Claude Sonnet 4.6, making 1,000,000-token context windows available at standard per-token pricing. The change also removes the previous requirement/beta header for very large requests and expands multimodal request capacity (higher images/PDF pages per request) as part of the rollout.
Unconfirmed reports: Opus 4.6 context window behavior changes
Community posts report that Opus 4.6 behavior around context window defaults (e.g., 1M context window) may have changed; these reports currently come from user/community threads and have not been confirmed by official Anthropic release notes or docs. The change, if true, would affect token handling and pricing/throughput assumptions.
Elevated errors reported on Claude Opus 4.6 and Sonnet 4.6 (service incident)
Multiple status and community posts reported elevated error rates and partial service disruption affecting Claude Opus 4.6 and Sonnet 4.6 around 2026-03-14. Reports originated from status/ticket updates and community threads indicating increased errors for API calls and consumer-facing apps; some automated posts referenced a resolved/mitigated state after initial reports.
1M token context window generally available for Claude Opus 4.6 and Sonnet 4.6
Multiple community posts, release-note aggregators, and recent client/tooling release notes indicate Claude Opus 4.6 and Sonnet 4.6 now support a 1,000,000-token (1M) context window as generally available/default, and some tooling (e.g., client releases) show Opus 4.6 becoming the default model in integrations. Reports also state the 1M context is available at standard/regular pricing and that dedicated 1M rate limits were removed in the reported updates.
Elevated errors on Claude Opus 4.6 and Sonnet 4.6 (status incident)
Anthropic posted a status incident (incident q58b2gkv64pw) on March 13 reporting elevated errors affecting Claude Opus 4.6 and Sonnet 4.6. The incident was visible in status and was referenced by automated social posts.
Temporary 2× off-peak usage boost for Claude (Mar 13–27, 2026)
Anthropic announced a limited-time boost that temporarily doubles Claude usage limits during off-peak hours from March 13–27, 2026. The change is automatic for eligible users and applies to web and API usage windows specified in the announcement.
Reports that Azure startup credits may not apply to Claude billing
Press reporting surfaced cases where Azure startup credits did not apply to Claude usage; Anthropic stated it has no visibility into Azure billing and directed customers to contact Microsoft. The reporting highlights potential gaps between cloud provider credit programs and billed usage for third‑party AI services.
1M token context becomes generally available for Claude Opus 4.6 and Sonnet 4.6 at standard pricing
Anthropic announced that the full 1,000,000-token context window for Claude Opus 4.6 and Claude Sonnet 4.6 is now generally available and is being offered at standard API pricing. The rollout makes the 1M context variant the default for some Claude Code and higher-tier plan usage while Pro/Sonnet users may opt in or see different availability. Third‑party reports cite per‑million token rates for the 1M variants (reported: Opus 4.6 ~ $5 input / $25 output per million tokens; Sonnet 4.6 ~ $3 input / $15 output per million tokens).
Limited-time March 13–27, 2026: doubled off-peak usage for Free/Pro/Max/Team plans
Anthropic published a limited‑time promotion (Claude March 2026 usage promotion) that doubles usage limits during off‑peak hours for eligible plans. The promotion runs from March 13, 2026 through March 27, 2026, and applies to Free, Pro, Max, and Team plans (Enterprise is excluded).
Anthropic (via code/release notes discovered in the Claude Code release stream and press coverage) increased default maximum output token limits for Claude Opus 4.6 to 64k tokens and raised the upper bound for Opus 4.6 and Sonnet 4.6 to 128k tokens to support much longer outputs.
Anthropic invests $100 million into the Claude Partner Network
Anthropic announced the Claude Partner Network and committed an initial $100 million to support partners in 2026. The program provides training, technical support, certifications, co‑marketing and direct partner investment to accelerate enterprise adoption of Claude.
Anthropic invests $100 million into the Claude Partner Network
Anthropic announced the Claude Partner Network, committing an initial $100 million in 2026 to support partner organizations that help enterprises adopt Claude. The program provides training, technical certification (Claude Certified Architect, Foundations available immediately), partner-facing engineering support, co-investment for go-to-market activities, and a Partner Portal; membership is free and applications open immediately.
Anthropic announced The Anthropic Institute on its news site (Mar 11, 2026). The Institute will publish research and analysis on societal impacts of powerful AI and expands Anthropic's public policy team and related activities.
Anthropic Issues Statement on Secretary of War Pete Hegseth Comments
Anthropic published an official statement responding to comments made by Secretary of War Pete Hegseth regarding AI military applications. The statement includes Anthropic's position on responsible AI use and guidance for its customers.
Dario Amodei Statement on Department of War Discussions
Anthropic CEO Dario Amodei released a statement regarding the company's discussions with the U.S. Department of War. The statement addresses Anthropic's policy stance on government AI partnerships and defense-related use cases.