GPT-5.1 Codex (high)
OpenAIGPTProprietary
Description
GPT-5.1 Codex is a version of GPT-5.1 optimized for agentic coding tasks in Codex or similar environments. It features higher reasoning capabilities and is available in the Responses API. The underlying model snapshot is regularly updated.
Release Date
2025-11-13
Parameters
—
Context Length
400K
Modalities
image, text
Capability Radar
49
general
75
coding
94
reasoning
58
science
50
agents
85
multimodal
Rankings
| Domain | #Rank | Score | Source |
|---|---|---|---|
| Agentic Capability | 76 | 45.0 | LS |
| Code Ranking | 75 | 76.0 | AA |
| General Ranking | 80 | 74.0 | AA |
| Science | 113 | 67.0 | AA |
Benchmark Scores (LLM Stats)
(LLM Stats (zeroeval))Agents
Terminal-Bench 2.0Stanford × Laude Institute (2026)
52.8%SR
Code
SWE-Bench Verified
73.7%SR
SWE-Lancer
66.3%SR
Math
AIME 2025
96.7%SR
AA Evaluation Indices
(Artificial Analysis)Math Index(Artificial Analysis)95.7
Intelligence Index(Artificial Analysis)35.6
Aime 25(MAA (Mathematical Association of America))1.0
Mmlu Pro(TIGER-Lab (Univ. of Waterloo, Toronto, CMU, 2024))0.9
Gpqa(NYU + Cohere + Anthropic (2023))0.9
Livecodebench(UC Berkeley + MIT + Cornell (2024))0.8
Tau2(Sierra + U Toronto + Vector Institute (2025))0.8
Ifbench(Google Research (2023))0.7
Lcr(Artificial Analysis)0.7
Scicode(UIUC + Argonne National Lab (2024))0.4
Terminalbench Hard(Stanford × Laude Institute (2026))0.3
Hle(Center for AI Safety + Scale AI (2025))0.3
LLM Stats Category Scores
(LLM Stats (zeroeval))Frontend Development70
Reasoning60
General60
Code60
Agents50
Tool Calling50
Pricing
Input Price$1.25 / 1M tokens
Output Price$10 / 1M tokens
Blended Price (3:1)$3.438 / 1M tokens
Cache Read Price$0.13 / 1M tokens
Speed
Tokens/sec0.0
Time to First Token0.00s
Time to Answer0.00s
Provider Price Ranking
Provider Price Ranking
10 providers
Cheapest: PoeMost Expensive: Impossibl
ProviderInputOutput
1PoeCheapest
$1.1
$9
2OpenAIPRIMARY
$1.25
$10
3NanoGPT
$1.25
$10
4OpenRouter
$1.25
$10
5ZenMux
$1.25
$10
6Kilo Gateway
$1.25
$10
7Cloudflare AI Gateway
$1.25
$10
8Vercel AI Gateway
$1.25
$10
9OrcaRouter
$1.25
$10
10Impossibl
$1.25
$10
Compare pricing across different API providers for this model.