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GPT-5.1 codex

Frontier Vision OpenAI

A version of GPT-5.1 optimized for agentic coding tasks.

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 September 2024

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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