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GPT-5.1 Codex

openai/gpt-5.1-codex

Codex GPT for repository edits, code review, and practical software agents

Source-linkedgpt-codexClosed weightsReleased 2025-11-13
Report data
Context window400K
Maximum output128K
Provider offers17
Knowledge cutoff2024-09-30
Capabilities

What this model supports

ReasoningYes
Tool callingYes
Structured outputYes
AttachmentsYes
Temperature controlNo
Open weightsNo
Creator
OpenAI
Family
gpt-codex
Modalities
Image, Text
License
Not documented
Release date
2025-11-13
Model ID
openai/gpt-5.1-codex
Market availability

Provider pricing

Report price →
Providers offering GPT-5.1 Codex
ProviderProvider model IDContextInput / 1MOutput / 1MCached / 1MFeaturesAll pricing
OpenCode Zengpt-5.1-codex400K$1.070$8.500$0.107R T S
View
{
  "cache_read": 0.107,
  "input": 1.07,
  "output": 8.5
}
Poeopenai/gpt-5.1-codex400K$1.100$9.000$0.110R T ·
View
{
  "cache_read": 0.11,
  "input": 1.1,
  "output": 9
}
OpenAIgpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
OrcaRouteropenai/gpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
LLM Gatewaygpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Cloudflare AI Gatewayopenai/gpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Azuregpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Kilo Gatewayopenai/gpt-5.1-codex400K$1.250$10.000$0.125R T ·
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
OpenRouteropenai/gpt-5.1-codex400K$1.250$10.000$0.130R T S
View
{
  "cache_read": 0.13,
  "input": 1.25,
  "output": 10
}
Azure Cognitive Servicesgpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
AIHubMixgpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
NanoGPTopenai/gpt-5.1-codex400K$1.250$10.000R · ·
View
{
  "input": 1.25,
  "output": 10
}
ZenMuxopenai/gpt-5.1-codex400K$1.250$10.000$0.120R T ·
View
{
  "cache_read": 0.12,
  "input": 1.25,
  "output": 10
}
Vivgridgpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Requestyopenai/gpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Abacusgpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Vercel AI Gatewayopenai/gpt-5.1-codex400K$1.250$10.000$0.125R T S
View
{
  "cache_read": 0.125,
  "input": 1.25,
  "output": 10
}
Evidence

Published benchmark results

Design Arena: codecategories vs top 8 models
Z.ai: GLM 5.2
1352.0
Claude Fable 5
1344.0
Anthropic: Claude Opus 4.6
1336.0
Anthropic: Claude Opus 4.7
1330.0
xAI: Grok 4.5
1328.0
Z.ai: GLM 5.1
1321.0
Kimi K2.6
1320.0
GPT-5.1 Codex
1193.0
Design Arena: dataviz vs top 8 models
Claude Fable 5
1372.0
Z.ai: GLM 5.1
1366.0
xAI: Grok 4.5
1330.0
Anthropic: Claude Opus 4.6
1321.0
Anthropic: Claude Opus 4.7
1320.0
Z.ai: GLM 5.2
1318.0
Anthropic: Claude Sonnet 4.6
1317.0
GPT-5.1 Codex
1212.0
Design Arena: fullstack vs top 8 models
Anthropic: Claude Opus 4.7
1503.0
Anthropic: Claude Opus 4.8
1322.0
Claude Sonnet 5
1314.0
Z.ai: GLM 5.2
1298.0
Claude Fable 5
1296.0
Anthropic: Claude Opus 4.6
1286.0
Anthropic: Claude Sonnet 4.6
1271.0
GPT-5.1 Codex
1089.0
Design Arena: gamedev vs top 8 models
Claude Fable 5
1387.0
Z.ai: GLM 5.2
1354.0
Claude Sonnet 5
1345.0
GPT-5.5
1344.0
Anthropic: Claude Opus 4.6
1339.0
MiMo-V2.5-Pro
1334.0
Anthropic: Claude Opus 4.7
1334.0
GPT-5.1 Codex
1200.0
Design Arena: mobileapps vs top 8 models
Anthropic: Claude Opus 4.8
1287.0
Claude Fable 5
1282.0
MiniMax: MiniMax M3
1273.0
Anthropic: Claude Opus 4.6
1259.0
Gemini 3.5 Flash
1259.0
Anthropic: Claude Sonnet 4.6
1255.0
Z.ai: GLM 5.2
1243.0
GPT-5.1 Codex
1201.0
Design Arena: webapps vs top 8 models
Claude Sonnet 5
1351.0
Claude Fable 5
1338.0
Anthropic: Claude Opus 4.7
1326.0
Anthropic: Claude Opus 4.8
1288.0
Z.ai: GLM 5.2
1280.0
xAI: Grok 4.5
1270.0
Qwen: Qwen3.7 Max
1267.0
GPT-5.1 Codex
1083.0
Design Arena: website vs top 8 models
Z.ai: GLM 5.2
1346.0
Claude Fable 5
1336.0
Anthropic: Claude Opus 4.6
1331.0
Anthropic: Claude Opus 4.7
1329.0
xAI: Grok 4.5
1323.0
Anthropic: Claude Sonnet 4.6
1320.0
Claude Sonnet 5
1314.0
GPT-5.1 Codex
1196.0