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GPT-5.3 Codex

OpenAI · gpt-5-3-codex

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Coding-optimized GPT model for repository edits, reviews, and agentic software work

Specification

openai listing

Context
400K
Max output
128K
Released
2026-02-05
Knowledge cutoff
2025-08-31
Retires
2027-08-24
Open weights
no
Input
text, image, pdf
Output
text

Price

US dollars per million tokens · openai list price

Input
$1.75
Output
$14.00
Cache read
$0.175
Cache write
$1.75

Batch and priority prices

US dollars per million tokens · per listing

PriceListing$/M
Priority inputopenai$3.50
Priority outputopenai$28.00

Quality

1 benchmark · 1 source

Composite
89th
percentile of 334 scored models
Rank
39 / 334
±0.10 sd
Evidence
1 × 1
too little evidence to place with confidence
Effort range
one configuration only
coding79th1/3 bench

Every score

one row per source and configuration — nothing averaged away

BenchmarkScoreConfigurationSourceRun
SWE-Bench verified74.8 ±2.0defaultEpoch AI2026-02-25

The leading figure for a benchmark is the median across its configurations, so one heroic high-effort run cannot set the number.

Available from 30 hosts

HostIn $/MOut $/MCache rdCache wrContextOutputRetires
openaivendor$1.75$14.00$0.175
400K
272K
128K
poe$1.60$13.00$0.16400K128K
abacus$1.75$14.00$0.18400K128K
aihubmix$1.75$14.00$0.175400K128K
azure$1.75$14.00$0.175
400K
272K
128K2027-08-24
azure-cognitive-services$1.75$14.00$0.175400K128K
databricks$1.75$14.00$0.175$1.75272K128K
edenai$1.75$14.00$0.175400K128K
fastrouter$1.75$14.00400K128K
freemodel$1.75$14.00$0.175$1.75400K128K
frogbot$1.75$14.00$0.175400K128K
github-copilot$1.75$14.00$0.175400K128K
impossibl$1.75$14.00$0.175400K128K
kilo$1.75$14.00$0.175400K128K
llmgateway$1.75$14.00$0.175400K128K
llmgateway-providers$1.75$14.00$0.175400K128K
nano-gpt$1.75$14.00$0.175400K128K
neon$1.75$14.00$0.175400K128K
ofox$1.75$14.00$0.18400K128K
opencode$1.75$14.00$0.175400K128K
openrouter$1.75$14.00$0.175
400K
272K
128K
opper$1.75$14.00$0.175400K128K
orcarouter$1.75$14.00$0.175400K128K
pioneer$1.75$14.00$0.175$1.75400K128K
requesty$1.75$14.00$0.175400K128K
vercel$1.75$14.00$0.175400K128K
vivgrid$1.75$14.00$0.175400K128K
zenmux$1.75$14.00400K128K
chatgpt · chatgpt128K128K
github_copilot · github-copilot128K128K

Price history

append-only observations · a listing writes a row only when its price moves

DateHostField$/M
2026-09-02openrouterCache read$0.175
2026-09-06openrouterCache read$0.175
2026-09-02openrouterInput$1.75
2026-09-06openrouterInput$1.75
2026-09-02openrouterOutput$14.00
2026-09-06openrouterOutput$14.00

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