GPT-5.1-Codex-Max

openai/gpt-5.1-codex-max

GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...

Input

$1.625 / 1M tokens

Output

$13 / 1M tokens

Context

400K tokens

Capabilities

✓ Streaming✓ Tool / function calling✓ JSON / structured output✓ Vision (image input)

Call this model

Pass openai/gpt-5.1-codex-max as the model. Change only the base URL from your existing OpenAI SDK setup.

quickstart.sh

curl https://modeldatabase.com/v1/chat/completions \
  -H "Authorization: Bearer $MDB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "openai/gpt-5.1-codex-max",
    "messages": [{"role":"user","content":"Hello!"}]
  }'

Prices are final — the routing margin is already included. See the full pricing table or the API docs.