OpenAI Releases GPT-5.2 Codex to Developers via Responses API

2026-01-15

OpenAI has launched the GPT-5.2 Codex model to developers via its Responses API. Previously exclusive to the Codex environment, this model excels at handling complex and tedious tasks, including developing new features, refactoring code, and tracking bugs. OpenAI also claims it is their most advanced cybersecurity model to date, aiding in the identification of vulnerabilities within codebases.

The model accepts both text and image inputs and offers four levels of reasoning effort: low, medium, high, and very high. It is priced at $1.75 per million input tokens and $14 per million output tokens, representing a significant upgrade from the earlier GPT-5 Codex model, which was priced at $1.25 per million input tokens and $10 per million output tokens.

Programming platforms Cursor and Windsurf have already integrated this model, with Windsurf offering it at a half-price discount for a limited time. OpenAI has also released a prompt guide for users.

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