Is GPT-5.1 deprecated or retired?

Yes. GPT-5.1 is Deprecated per OpenAI's own deprecation notice and shuts down on 2027-04-01. ModelPriceWatch last re-verified this status on 2026-10-18.

When does GPT-5.1 shut down?

OpenAI has announced GPT-5.1 shuts down on 2027-04-01. It remains purchasable until then, but new work should target a current model.

Is GPT-5.1 deprecated?

OpenAI · lifecycle status verified Oct 18, 2026 against the provider's own page.

Yes — GPT-5.1 is deprecated and shuts down Apr 1, 2027. Still purchasable until then, but OpenAI has announced end-of-life. Don't start new work on it.

Last verified pricing

historical reference — not a buy recommendation

GPT-5.1 was last priced at $1.25 per 1M input tokens and $10.00 per 1M output tokens, with a 400K-token context window. Full history stays on the GPT-5.1 model page.

What replaced GPT-5.1?

successor named by OpenAI

OpenAI's named successorfrom the deprecation notice — not our inference

Model	Input $/M	Output $/M	Context
GPT-5.1 Deprecated	$1.25	$10.00	400K
GPT-6 Sol	$2.00	$10.00	1M	details →

Picking a replacement

We don't hold a benchmark average for GPT-5.1, so we won't claim any model is "equivalent" to it. The current OpenAI lineup below is a factual starting point, with no quality-parity claim.

Current OpenAI alternatives

same provider, sold today — no parity claim

Model	Input $/M	Output $/M	Context
GPT-5.2	$1.75	$14.00	400K	details →
GPT-5.6 Terra	$2.00	$12.00	1M	details →
GPT-6 Sol	$2.00	$10.00	1M	details →
GPT-6.1 Sol	$2.00	$10.00	1M	details →

Migrating off GPT-5.1? The migration calculator compares your exact input/output token mix against every current model we track, with benchmark tradeoffs. Lifecycle data on this page comes from OpenAI's own page and was last re-verified on Oct 18, 2026. See all retired & deprecated models.