OpenAI: GPT-5 Codex

Name: OpenAI: GPT-5 Codex
Price: 10 USD
Author: openai

OpenAI: GPT-5 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	39	artificial_analysis
AA Intelligence Index	45	artificial_analysis
AA Math Index	99	artificial_analysis
AIME 2025	98.7%	artificial_analysis
GPQA Diamond	83.7%	artificial_analysis
Humanity's Last Exam	25.6%	artificial_analysis
IFBench	74.1%	artificial_analysis
LCR (long-context reasoning)	69.0%	artificial_analysis
LiveCodeBench	84.0%	artificial_analysis
MMLU-Pro	86.5%	artificial_analysis
SciCode	40.9%	artificial_analysis
τ²-bench	86.8%	artificial_analysis
Terminal-Bench Hard	37.9%	artificial_analysis
Median output throughput (tokens/s)	195	artificial_analysis
Median time to first token (s)	4.59	artificial_analysis

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

Model details

Lab: openai
Released: 2025-09-23
Weights: —
Context: 400K
Max output: 128K
Knowledge cutoff: 2024-09-30
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 Codex open weights?

Open-weights status for OpenAI: GPT-5 Codex is not recorded.