GPT-5.3 Codex
5 February 2026
GPT-5.3 Codex from OpenAI, language model published 2026-02-05. Notable for: significant use.
Where it runs
| Provider | Model id | Context | Input | Output |
|---|---|---|---|---|
| OpenRouter | openai/gpt-5.3-codex | 400K | $1.75/M | $14/M |
Sources: Epoch AI, OpenRouter. This entry was generated from a dataset and has not been edited by hand.