GPT-5.3 Codex
GPT-5.3 Codex is a coding model from OpenAI, released on 2026-02-05. It accepts text and image input and returns text output. The recorded context window is 400K, and the recorded maximum output is 125K. Cataloged capabilities include Reasoning model, Multilingual, and Coding model. The model weights are proprietary and are not published for download. Use the linked references to confirm current access, licensing, and provider-specific limits.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
| Type | Condition | Input | Output |
|---|---|---|---|
| Text | - | $1.75/ 1M | $14.00/ 1M |
| Type | TTL | Write | Read |
|---|---|---|---|
| Text | - | - | $0.175/ 1M |
GPT-5.3 Codex currently shows benchmark results led by Terminal Bench 2.0 (3 / 47, score 77.30), IC SWE-Lancer(Diamond) (1 / 8, score 81.40), LiveBench (25 / 115, score 72.76). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.
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GPT-5.3 Codex is a coding model from OpenAI, released on 2026-02-05.
It accepts text and image input and produces text output. Its cataloged capabilities include Reasoning model, Multilingual, and Coding model. The recorded context window is 400K, and the recorded maximum output is 125K.
The model weights are proprietary and are not published for download. The page records 3 API pricing rules from OpenAI; current provider pricing and conditions should be checked before deployment. The evaluation section contains 5 cataloged benchmark results with their recorded modes and scores. The page links 2 release, model-card, repository, or provider references for checking the underlying claims. Specifications, availability, and prices can change; undisclosed values are intentionally left unstated.
GPT-5.3 Codex is a coding model from OpenAI, released on 2026-02-05. It accepts text and image input and returns text output. The recorded context window is 400K, and the recorded maximum output is 125K. Cataloged capabilities include Reasoning model, Multilingual, and Coding model. The model weights are proprietary and are not published for download. Use the linked references to confirm current access, licensing, and provider-specific limits.
The current model record lists text and image as input and text as output.
The recorded context window is 400K, and the recorded maximum output is 125K. Fields without a source-backed value remain undisclosed.
The page records 3 API pricing rules from OpenAI; current provider pricing and conditions should be checked before deployment.
The evaluation section contains 5 cataloged benchmark results with their recorded modes and scores. Compare only results that use the same benchmark version and evaluation mode.
The model weights are proprietary and are not published for download. Review the linked license text before commercial or derivative use.
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