OpenAI: GPT-5.1-Codex

Name: OpenAI: GPT-5.1-Codex
Price: 10 USD
Author: openai

OpenAI: GPT-5.1-Codex is openai's model. It is not yet scored on the meo first-party benchmark; aggregated third-party results and OpenRouter metadata are shown below.

Aggregated third-party benchmarks

Benchmark	Value	Source
AA Coding Index	37	artificial_analysis
AA Intelligence Index	43	artificial_analysis
AA Math Index	96	artificial_analysis
AIME 2025	95.7%	artificial_analysis
GPQA Diamond	86.0%	artificial_analysis
Humanity's Last Exam	23.4%	artificial_analysis
IFBench	70.0%	artificial_analysis
LCR (long-context reasoning)	67.3%	artificial_analysis
LiveCodeBench	84.9%	artificial_analysis
MMLU-Pro	86.0%	artificial_analysis
SciCode	40.2%	artificial_analysis
τ²-bench	83.0%	artificial_analysis
Terminal-Bench Hard	34.8%	artificial_analysis
Median output throughput (tokens/s)	172	artificial_analysis
Median time to first token (s)	5.19	artificial_analysis

Artificial Analysis (artificialanalysis.ai). Redistribution requires an AA commercial license.

Model details

Lab: openai
Released: 2025-11-13
Weights: —
Context: 400K
Max output: 128K
Knowledge cutoff: —
Price in: $1.25/M
Price out: $10.00/M
Modality: text+image->text

View on OpenRouter ↗

Sources: openrouter · artificial_analysis

FAQ

Is OpenAI: GPT-5.1-Codex open weights?

Open-weights status for OpenAI: GPT-5.1-Codex is not recorded.