OpenAI model product
GPT-5-Codex
GPT-5 Codex has been trained specifically for conducting code reviews and finding critical flaws.
Updated Aug 12, 2026. Default version: GPT-5 Codex
LLMBoard score43.6GPT-5 Codex
Coverage20%1 benchmark families
Context window400KTokens
Official input priceN/AOfficial price unavailable
GPT-5-Codex Specifications
Technical details for the model's default version.
- Version
- GPT-5 Codex
- Released
- Sep 15, 2025
- Knowledge cutoff
- Sep 30, 2024
- Parameters
- N/A
- Context window
- 400K
- Max output
- 128K
- Inputs
- image, text
- Outputs
- text
- Open weights
- No
- License
- Proprietary
GPT-5-Codex Capability Profile
This profile uses the model's current scored version. Arena ratings and prices are shown separately.
GPT-5-Codex Benchmark Results
Benchmark scores for GPT-5 Codex.
| SWE-Bench Verified | 74.5% | 38 | 105 | 64.4% | C |
GPT-5-Codex Arena Results
Preference and agent-evaluation results for the default version.
No Arena results
The default version does not have a matching Arena result yet.
GPT-5-Codex Runtime Performance
Provider-specific output speed and catalog latency for GPT-5 Codex. Runtime does not affect the capability score.
No runtime data
Browse runtime rankingsNo provider-specific speed or latency record is linked to the default version yet.
Output Speed is generated output tokens received per second. Catalog latency is reported separately from observed provider TTFT.
GPT-5-Codex Pricing
Official vendor API pricing appears first, followed by individual provider offers.
- Official API
- N/A
- Official provider
- N/A
- Lowest third-party
- From $1.25 input, $10 output per 1M via Impossibl
- Tracked offerings
- 4
| Impossibl | openai/gpt-5-codex | global | $1.25 | $10 | 400K | |
| NanoGPT | openai/gpt-5-codex | global | $1.25 | $10 | 256K | |
| OrcaRouter | openai/gpt-5-codex | global | $1.25 | $10 | 400K | |
| Vercel AI Gateway | openai/gpt-5-codex | global | $1.25 | $10 | 400K |
Official prices use only the vendor's configured official Provider and positive standard USD PAYG rates. Third-party offers remain explicitly labeled.
GPT-5-Codex Versions
Available versions of this model. The score column identifies the version used in the overall ranking.
| GPT-5 Codex | 43.6 | N/A | 400K | 128K | No | Proprietary |
What is GPT-5-Codex?
Key information about GPT-5-Codex and its available data.
GPT-5 Codex has been trained specifically for conducting code reviews and finding critical flaws. When reviewing, it navigates your codebase and analyzes code patterns to identify potential security vulnerabilities, performance issues, and bugs.
Data as of 2026-08-11.
GPT-5-Codex vs nearby models
Open a comparison with the three ranked models immediately above and below this model.
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FAQ
Common questions about GPT-5-Codex.
When was GPT-5-Codex released?
GPT-5-Codex's default version was released on Sep 15, 2025.
How much does GPT-5-Codex cost?
No official standard PAYG price is currently available for GPT-5-Codex. The lowest tracked third-party offer starts at $1.25 input and $10 output via Impossibl.
Who created GPT-5-Codex?
GPT-5-Codex was created by OpenAI.
What is the context window for GPT-5-Codex?
The default version has a 400K token context window.
Is GPT-5-Codex open weight?
No. The default version is not marked as having publicly available weights.
How many API providers offer GPT-5-Codex?
4 provider offerings are linked to the default version.
What models should I compare GPT-5-Codex with?
Nearby ranked alternatives include GPT-OSS-120B, MiniMax M2, Nova 2 Omni.