---
title: "GPT-5.1 Thinking"
modelId: "gpt-5.1-2025-11-13"
families:
  - {"id":"gpt-5-1","collection":"families"}
developer:
  id: "openai"
  collection: "orgs"
releaseDate: "2025-11-12"
links:
  announcement: {"label":"Announcement","href":"https://openai.com/index/gpt-5-1-for-developers/","date":"2025-11-13"}
  systemCard: {"label":"System Card","href":"https://openai.com/index/gpt-5-system-card-addendum-gpt-5-1/","date":"2025-11-12"}
  docs: {"label":"OpenAI API","href":"https://developers.openai.com/api/docs/models/gpt-5.1"}
  modelsDev: {"label":"models.dev","href":"https://models.dev/openai/gpt-5.1"}
  openrouter: {"label":"OpenRouter","href":"https://openrouter.ai/openai/gpt-5.1"}
surfaces:
  - {"surface":{"id":"openai","collection":"surfaces"},"releaseDate":"2025-11-13","requestable":false}
  - {"surface":{"id":"chatgpt","collection":"surfaces"},"releaseDate":"2025-11-12","retirementDate":"2026-03-11","requestable":false}
trainingDataCutoff: "2024-09-30"
contextWindow: 400000
maxOutput: 128000
inputModalities:
  - "Text"
  - "Image"
outputModalities:
  - "Text"
pricing:
  input: 1.25
  output: 10
toolUse: true
capabilities:
  thinking: {"supported":true}
  structured_outputs: {"supported":true}
  image_input: {"supported":true}
---

# GPT-5.1 Thinking

Canonical URL: https://ghost.fail/models/gpt-5-1-2025-11-13