OpenAI

Available in Shortly AI

GPT-5.1-Codex

Released November 12, 2025

ReasoningVision (Image)Tool Use

GPT-5.1-Codex is a version of GPT-5.1 optimized for agentic coding tasks in Codex or similar environments.

Context window: 400K tokens
Maximum output: 128K tokens
Input pricing: $1.25/M
Output pricing: $10.00/M

Independent benchmark

LiveBench historical snapshot

71.4overall

Historical benchmark data from LiveBench, release 2025-12-23. Scores are pinned and are not fetched on page load.

82.0

71.8

53.3

91.1

68.8

69.5

63.4

Benchmarks measure selected evaluation tasks and do not guarantee performance for every prompt or workflow.

FAQ

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