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GPT-5-Codex

GPT-5-Codex is a GPT-5 family model specialized for autonomous software engineering, designed to operate as a coding agent that reads repositories, writes code, executes tests, and iterates on solutions in sandboxed environments.

File InputReasoningTool UseVision (Image)Implicit Caching
index.ts
import { streamText } from 'ai'
const result = streamText({
model: 'openai/gpt-5-codex',
prompt: 'Why is the sky blue?'
})