OpenAI: GPT-5.3-Codex
GPT-5.3-Codex is OpenAI’s most advanced agentic coding model, combining the frontier software engineering performance of GPT-5.2-Codex with the broader reasoning and professional knowledge capabilities of GPT-5.2. It achieves state-of-the-art results...
Specifications
| Lab | OpenAI |
|---|---|
| Context window | 400,000 |
| Input price | $1.75/1M |
| Output price | $14.00/1M |
| Release | 2026-02-01 00:00:00 |
In Depth: GPT-5.3-Codex
Summary
GPT-5.3-Codex is an AI model from OpenAI.
Released 2026-02-01 00:00:00. It currently appears in the Overall category on LMRank and 1 other category. It supports Text, image, file input and produces Text output, with a context window of 400K tokens. Input pricing is $1.75 per 1M tokens and output is $14.00 per 1M tokens on OpenRouter.