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Update

Retiring GPT-5.1 models

ChatGPTChatGPT
OpenAI

March 11, 2026

Retiring GPT-5.1 models
As of March 11, 2026, GPT-5.1 models are no longer available in ChatGPT.

This applies to GPT-5.1 Instant, GPT-5.1 Thinking, and GPT-5.1 Pro. Existing conversations that used GPT-5.1 will automatically continue on the corresponding current model: GPT-5.3 Instant, GPT-5.4 Thinking, or GPT-5.4 Pro.

More updatesTo the product
The manufacturer OpenAI has not yet set up its devicebase profile. Content such as updates, compatibilities and support may only be maintained with a delay.
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