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.
File InputTool UseReasoningVision (Image)Web SearchImplicit Caching
index.ts
import { streamText } from 'ai'
const result = streamText({ model: 'openai/gpt-5.1-codex', prompt: 'Why is the sky blue?'})Providers
Route requests across multiple providers. Copy a provider slug to set your preference. Visit the docs for more info. Using a provider means you agree to their terms, listed under Legal.
| Provider |
|---|
 OpenAI | 400K | 0.5s | 56tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $10.00/K + input costs | — | +4 | 11/12/2025 | ||
 Azure | 400K | 0.6s | 42tps | $1.25/M | $10.00/M | Read:$0.13/M Write:— | $14/K + input costs | — | +4 | 11/12/2025 |