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

Claude 3.7 Sonnet Frontier Claude 3.7 Sonnet (high output) Frontier Claude 3.7 Sonnet (thinking) Frontier Claude 4.5 Opus 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

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

GPT-5.2 Codex

Specifications

Default Parameters

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