Long-horizon coding
Used native context compaction to continue extended coding tasks with less loss of earlier repository context.
Historical tool archive
GPT-5.2-Codex: historical overview
Deprecated legacy model. GPT-5.2-Codex was OpenAI's coding-optimized model for long-running software engineering and defensive cybersecurity tasks.
No longer active
Archive
What GPT-5.2-Codex was
OpenAI released GPT-5.2-Codex in December 2025 as a coding-focused version of GPT-5.2. It improved long-horizon work through context compaction, large refactors and migrations, Windows-based agent workflows, screenshot and diagram understanding, and defensive cybersecurity tasks.
GPT-5.2-Codex is now listed as deprecated in OpenAI's model catalog and is no longer a model teams should select for new Codex workflows. Its API documentation remains available for legacy reference and migration planning, with newer Codex and GPT model generations taking its place.
Past capabilities
What GPT-5.2-Codex offered
Large code changes
Was optimized for feature builds, refactors, migrations, and other work spanning many files.
Image understanding
Accepted image input for interpreting screenshots, technical diagrams, charts, and interface mockups.
Agent API features
Supported streaming, function calling, structured outputs, and low through xhigh reasoning effort.
Availability
Why this listing is historical
OpenAI's legacy API page lists GPT-5.2-Codex at $1.75 per million input tokens, $0.175 per million cached input tokens, and $14 per million output tokens. Because the model is deprecated, these figures are included for legacy cost analysis rather than new deployment planning.
- OpenAI now lists GPT-5.2-Codex as deprecated
- It is no longer the recommended model for new Codex or coding-agent deployments
- Audio and video input were not supported
Status checked . Review the historical source ↗
Current options
Active GPT-5.2-Codex alternatives
Coding
GPT-5.3-Codex
GPT-5.3-Codex was the direct next Codex generation and is useful for understanding the model line's progression.
Explore GPT-5.3-Codex →Coding
Codex
Use the main Codex page for the current agentic coding product, surfaces, and model options.
Explore Codex →Coding
Codex App
Use the Codex App page for the current desktop workflow for managing multiple coding agents.
Explore Codex App →Questions
GPT-5.2-Codex FAQs
What was GPT-5.2-Codex?
It was OpenAI's coding-optimized GPT-5.2 variant for long-running agentic software engineering and defensive cybersecurity work.
Is GPT-5.2-Codex still current?
No. OpenAI's API model catalog now marks GPT-5.2-Codex as deprecated.
What was GPT-5.2-Codex designed to improve?
OpenAI emphasized context compaction, large refactors and migrations, Windows environments, vision for technical images, tool calling, and cybersecurity capabilities.
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