Migrating from gpt-5.2-codex to gpt-5.3-codex

What changes when you move from gpt-5.2-codex to gpt-5.3-codex: prices, limits, features and parameters, read from each company's own pages.

From: gpt-5.2-codex
Status: Retired
Shutdown: Jul 23, 2026
Time left: —

To: gpt-5.3-codex
Status: Deprecated
Shutdown: Apr 1, 2027
Time left: 168 days

gpt-5.3-codex is itself deprecated, shutting down Apr 1, 2027. Its replacement is gpt-6-sol.

Prices

USD per 1M tokens, standard tier

Type	gpt-5.2-codex	gpt-5.3-codex	Change
Input	Not published	$1.75first seen October 1, 2026 · source	—
Cached input	Not published	$0.175first seen October 1, 2026 · source	—
Output	Not published	$14.00first seen October 1, 2026 · source	—

Other tiers, prompt-size bands and modalities are on each model's page.

Limits

Tokens

Limit	gpt-5.2-codex	gpt-5.3-codex	Change
Context window	400,000 tokensin place when tracking began (October 6, 2026) · source	400,000 tokensin place when tracking began (October 6, 2026) · source	0%
Max output tokens	128,000 tokensin place when tracking began (October 6, 2026) · source	128,000 tokensin place when tracking began (October 6, 2026) · source	0%

Benchmarks

Same benchmark and source on both sides; settings named where they differ

Benchmark	gpt-5.2-codex	gpt-5.3-codex	Change
Arena WebDevArena, codex harness (vs no setting). Ranges don't overlap.	1338 ±9	1371 ±11	+33

A score from one source is never compared with another source's, and company-reported scores are compared only within the same company; settings named where they differ. Data: Arena (arena.ai), CC BY 4.0.

Features and parameters

Compare models

Same on both

Structured outputs: supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Function calling: supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Prompt caching: supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Batch API: not supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Image input: supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Reasoning / thinking: supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Fine-tuning: not supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source
Built-in web search: supported on both.gpt-5.2-codex: in place when tracking began (October 6, 2026) · source · gpt-5.3-codex: in place when tracking began (October 6, 2026) · source

Not published for gpt-5.2-codex: PDF input, temperature parameter, top_p parameter, logprobs.

Not published for gpt-5.3-codex: PDF input, temperature parameter, top_p parameter, logprobs.

Aliases

All aliases

No aliases point at either model.

On cloud platforms

All platform dates

Model	Platform	Platform ID	Shutdown	Time left
gpt-5.2-codex	Microsoft Foundryversion 2026-01-14	gpt-5.2-codex	Jul 13, 2027Active	271 days
gpt-5.3-codex	Microsoft Foundryversion 2026-02-24	gpt-5.3-codex	Aug 24, 2027Active	313 days

Read daily from each platform's own pages. The status above uses each company's own date. Time left counts to 00:00 UTC on the shutdown date, which is the evening before in ET.

Checklist

Change the model string from gpt-5.2-codex to gpt-5.3-codex.

Compared from AIWire's published data when this page loaded. Each fact links to the page it came from. Model pages: gpt-5.2-codex, gpt-5.3-codex.