---
title: "Claude Sonnet 5.5"
shortTitle: "Sonnet 5.5"
modelId: "claude-sonnet-5-5"
families:
  - {"id":"claude","collection":"families"}
  - {"id":"claude-sonnet","collection":"families"}
  - {"id":"claude-5-5","collection":"families"}
developer:
  id: "anthropic"
  collection: "orgs"
releaseDate: "2026-09-28"
links:
  announcement: {"label":"Announcement","href":"https://www.anthropic.com/news/claude-sonnet-5-5","date":"2026-09-28"}
  systemCard: {"label":"System Card","href":"https://www.anthropic.com/claude-sonnet-5-5-system-card","date":"2026-09-28"}
  docs: {"label":"Anthropic API","href":"https://platform.claude.com/docs/en/models/sonnet-5-5/overview"}
  modelsDev: {"label":"models.dev","href":"https://models.dev/anthropic/claude-sonnet-5-5"}
  openrouter: {"label":"OpenRouter","href":"https://openrouter.ai/anthropic/claude-sonnet-5.5"}
surfaces:
  - {"surface":{"id":"anthropic","collection":"surfaces"},"createdAt":"2026-09-28","releaseDate":"2026-09-28","retirementDate":"2027-09-28","requestable":false}
  - {"surface":{"id":"claude-dot-ai","collection":"surfaces"},"releaseDate":"2026-09-28","requestable":false}
  - {"surface":{"id":"bedrock","collection":"surfaces"},"releaseDate":"2026-09-28","requestable":false}
  - {"surface":{"id":"google-cloud","collection":"surfaces"},"releaseDate":"2026-09-28","requestable":false}
trainingDataCutoff: "2026-06-30"
reliableKnowledgeCutoff: "2026-06-30"
contextWindow: 1000000
maxOutput: 128000
inputModalities:
  - "Text"
  - "Image"
  - "PDF"
outputModalities:
  - "Text"
pricing:
  input: 2
  output: 10
toolUse: true
capabilities:
  batch: {"supported":true}
  citations: {"supported":true}
  code_execution: {"supported":true}
  context_management: {"supported":true,"clear_tool_uses_20250919":{"supported":true},"clear_thinking_20251015":{"supported":true},"compact_20260112":{"supported":true}}
  effort: {"supported":true,"low":{"supported":true},"medium":{"supported":true},"high":{"supported":true},"xhigh":{"supported":true},"max":{"supported":true}}
  image_input: {"supported":true}
  pdf_input: {"supported":true}
  structured_outputs: {"supported":true}
  thinking: {"supported":true,"types":{"enabled":{"supported":false},"adaptive":{"supported":true}}}
---

# Claude Sonnet 5.5

Canonical URL: https://ghost.fail/models/claude-sonnet-5-5