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GPT-5.2 Codex

GPT-5.2 Codex

Frontier Vision OpenAI

OpenAI's coding-optimized model built on GPT-5.2. Designed for agentic coding tasks including building projects from scratch, feature development, debugging, large-scale refactoring, and code review. Supports multimodal inputs for UI development.

Try on Simtheory
Qwen 3.6 Plus Frontier Claude 4.5 Sonnet Frontier Claude 4.5 Sonnet (thinking) Frontier Claude 4.6 Opus Frontier Claude 4.6 Opus Max Frontier Claude 4.6 Sonnet Frontier Claude 4.6 Sonnet Max Frontier Claude 4.7 Opus Frontier Claude 4.7 Opus Max Frontier Claude Fable 5 Frontier

Specifications

Context window 400,000 tokens
Max output 128,000 tokens
Knowledge cutoff August 2025
Multipart messages Yes
Vision capabilities Yes

Default Parameters

Temperature 0.3
Top P 1.0
Frequency penalty 0.0
Presence penalty 0.0

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