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GPT-5.1-Codex

GPT-5.1-Codex is a GPT-5.1 generation coding agent model designed for autonomous software engineering, combining improved reasoning over the GPT-5 codex generation with the ability to read, write, execute, and verify code in sandboxed environments. Your use is subject to OpenAI's Terms & Privacy Policies.

File InputImplicit CachingReasoningTool UseVision (Image)Web Search
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import { streamText } from 'ai'


const result = streamText({
  model: 'openai/gpt-5.1-codex',
  prompt: 'Why is the sky blue?'
})
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Provider
Context
Max Output
Latency
Throughput
Input
Output
Cache
Web Search
Capabilities
ZDR
No Training
Free Tier
Release Date
Azure
Legal:Terms•Privacy
400K128K
0.5s
67tps
$1.25/M
$10/M
Read:$0.13/M
Write:—
$14/K
+ input costs
+3
11/12/2025