Obituaries · OpenAI

gpt-5.1-codex-max, ?–2026

Retired by OpenAI

gpt-5.1-codex-max, an OpenAI model that wrote code that other people then took credit for, was switched off on July 23, 2026. Requests addressed to it are expected to come back unanswered.

Its work passes to gpt-5.6-sol, which the family describes as 'recommended'.

Model ID	`gpt-5.1-codex-max`
Provider	OpenAI deprecations page
Shut down	July 23, 2026
Successor	`gpt-5.6-sol`

In lieu of flowers

Replace the string. Search your code for gpt-5.1-codex-max and swap it for gpt-5.6-sol, or paste a repo into Model Graveyard Check to find every dead model at once.

Want to say something to it? Leave a letter on the farewell wall.

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Technical notice, with a code scanner: gpt-5-1-codex-max on Model Graveyard Check