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
48
general
75
coding
94
reasoning
57
scienceest.
50
agents
85
multimodal
Science uses a reasoning proxy when dedicated science benchmarks are unavailable.
Rankings
| Domain | #Rank | Score | Source |
|---|---|---|---|
| Agentic Capability | 78 | 53.0 | LS |
| Code Ranking | 37 | 79.0 | AA |
| General Ranking | 51 | 75.0 | AA |
| Math Reasoning | 6 | 97.0 | AA |
| Science | 67 | 67.0 | AA |
Benchmark Scores (LLM Stats)
Agents
Terminal-Bench 2.0
52.8%SR
Code
SWE-Bench Verified
73.7%SR
SWE-Lancer
66.3%SR
AA Evaluation Indices
Math Index95.7
Intelligence Index34.7
Aime 251.0
Mmlu Pro0.9
Gpqa0.9
Livecodebench0.8
Tau20.8
Ifbench0.7
Lcr0.7
Scicode0.4
Terminalbench Hard0.3
Hle0.2
LLM Stats Category Scores
Frontend Development70
Reasoning60
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$0.125 / 1M tokens
Speed
Tokens/sec202.7
Time to First Token6.91s
Time to Answer6.91s
Provider Price Ranking
Provider Price Ranking
20 providers
Cheapest: OpenCode ZenMost Expensive: OrcaRouter
ProviderInputOutput
1OpenCode ZenCheapest
$1.07
$8.5
2Poe
$1.1
$9
3Jiekou.AI
$1.125
$9
4OpenAIPRIMARY
$1.25
$10
5NanoGPT
$1.25
$10
6Abacus
$1.25
$10
7OpenRouter
$1.25
$10
8ZenMux
$1.25
$10
9Vivgrid
$1.25
$10
10Kilo Gateway
$1.25
$10
11Cloudflare AI Gateway
$1.25
$10
12Helicone
$1.25
$10
13AIHubMix
$1.25
$10
14Azure Cognitive Services
$1.25
$10
15Requesty
$1.25
$10
16DigitalOcean
$1.25
$10
17Vercel AI Gateway
$1.25
$10
18LLM Gateway
$1.25
$10
19Azure
$1.25
$10
20OrcaRouter
$1.25
$10
Compare pricing across different API providers for this model.