Skip to content
AnyRouter

GPT-5.1 Codex Max

Tools
openai/gpt-5.1-codex-max

400K context · Dec 2025 · 4 upstreams

GPT-5.1 Codex Max is a maximum-effort variant of GPT-5.1 Codex optimized for long-horizon agentic coding inside the Codex environment, with extended context and reasoning support. Served through OpenAI's Codex surfaces.

Bring your own keyAnyRouter has no platform route for GPT-5.1 Codex Max. Requests use your key and bill your provider account. AnyRouter adds no fee.
context
400K
input / 1M (list)
$1.25
output / 1M (list)
$10.00
routes
4
speed, 24h
—

Upstreams

4
  1. 1OpenCode ZenYour key · not addedyour planTPS —TTFT ——
  2. 2Vercel AI GatewayYour key · not addedyour planTPS —TTFT ——
  3. 3OpenRouterYour key · not addedyour planTPS —TTFT ——
  4. 4Nous ResearchYour key · not addedyour planTPS —TTFT ——
  • Up
  • No traffic
  • Down

Try it

Send a prompt

Details

Owner
OpenAI
Kind
Vision
Released
Dec 2025
Context
400K
Data policy
Provider retention
Endpoint
/api/v1/chat/completions

Quick start

curl https://anyrouter.dev/api/v1/chat/completions \
  -H "Authorization: Bearer $ANYROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
  "model": "openai/gpt-5.1-codex-max",
  "messages": [
    {
      "role": "user",
      "content": "Say hi in 3 words."
    }
  ]
}'