Is GPT-5.3 Codex deprecated or retired?

Yes. GPT-5.3 Codex 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-5.3 Codex shut down?

OpenAI has announced GPT-5.3 Codex shuts down on 2027-04-01. It remains purchasable until then, but new work should target a current model.

Is GPT-5.3 Codex deprecated?

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

Yes — GPT-5.3 Codex 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historical reference — not a buy recommendation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-5.3 Codex was last priced at $1.75 per 1M input tokens and $14.00 per 1M output tokens, with a 400K-token context window. Its benchmark average was 71 on the blend we track. Full history stays on the GPT-5.3 Codex model page.

What replaced GPT-5.3 Codex?

successor named by OpenAI

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

Model	Input $/M	Output $/M	Context
GPT-5.3 Codex Deprecated	$1.75	$14.00	400K
GPT-6 Sol	$2.00	$10.00	1M	details →

Same benchmark score or better, for less

computed from live prices + benchmark averages

Cheaper equivalentsscore ≥ 71 on the benchmark blend, ranked by blended cost ((3×input + 1×output) ÷ 4)

Model	Benchmark	Blended $/M	Input $/M	Output $/M
GPT-5.3 Codex Deprecated	71	$4.81	$1.75	$14.00
DeepSeek V4 Flash DeepInfra cheapest	77.5	$0.090	$0.060	$0.180	details →

"Equivalent" here means the model's benchmark average is at or above GPT-5.3 Codex's 71. Benchmarks compress real quality differences — validate on your own workload before switching. Model your exact token mix in the migration calculator.

Migrating off GPT-5.3 Codex? 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.