GPT-5.2-Codex is an upgraded version of GPT-5.1-Codex optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
Specifications
- Provider
- OpenAI
- Type
- Vendor / proprietary
- Modality
- text+image->text
- Context window
- 400K
- Released
- January 14, 2026
Capabilities
Input: textInput: imageOutput: textReasoning requiredConfigurable reasoning effort
Strengths
include_reasoningmax_completion_tokensreasoningreasoning_effortresponse_formatseedstructured_outputstool_choicetools
