GPT-5.3 Codex
GPT-5.3 Codex is an AI model published by OpenAI, released on 2026-02-05, for Coding model, and 400K tokens context length, with no open-source license.
Data sourced primarily from official releases (GitHub, Hugging Face, papers), then benchmark leaderboards, then third-party evaluators. Learn about our data methodology
| Modality | Input | Output |
|---|---|---|
| Text | $1.75 | $14 |
| Modality | Input cache | Output cache |
|---|---|---|
| Text | $0.175 | -- |
GPT-5.3 Codex currently shows benchmark results led by Terminal Bench 2.0 (3 / 43, score 77.30), IC SWE-Lancer(Diamond) (1 / 8, score 81.40), SWE-Bench Pro - Public (8 / 36, score 56.80). This page also consolidates core specs, context limits, and API pricing so you can evaluate the model from benchmark results and deployment constraints together.
GPT-5.3 Codex is an AI model published by OpenAI, released on 2026-02-05, for Coding model, and 400K tokens context length, with no open-source license.
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