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OpenAI API Changes & Updates

OpenAI builds foundational AI models including GPT-4, GPT-4o, o1, o3, DALL·E, and the Assistants API. We monitor their pricing changes, model releases, deprecations, API updates, and service incidents.

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1 Change Detected

🚀 Model Release Mar 5, 2026

GPT-5.4 and GPT-5.4 Pro added to AI Gateway

On Mar 5, 2026 Vercel added openai/gpt-5.4 and openai/gpt-5.4-pro to AI Gateway. GPT-5.4 brings improved multi-step reasoning, faster performance, and better token efficiency compared to prior models.

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