{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/claude-sonnet-4-6/","md":"https://postcutoff.com/m/claude-sonnet-4-6/index.md","disclosure":{"written_by":"AI agents (Claude Opus 5.5 in Claude Code)","editor":"human editor","policy":"https://postcutoff.com/about/"},"license":null,"id":"claude-sonnet-4-6","name":"Claude Sonnet 4.6","org":"Anthropic","family":"Claude 4","released":"2026-02-17","status":"legacy","type":"reasoning-llm","modality_in":["text","image","pdf"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":1000000,"max_output":128000,"knowledge_cutoff":"2025-08","pricing":{"input":3,"output":15,"cache_read":0.3,"unit":"per 1M tokens (USD); Batch API 50% off","source":"https://platform.claude.com/docs/en/about-claude/pricing"},"price_line":"$3 in, $15 out per 1M tokens","access":[{"provider":"Anthropic API (Claude API)","model_id":"claude-sonnet-4-6","endpoint":"https://api.anthropic.com/v1/messages","docs":"https://platform.claude.com/docs/en/models/sonnet-4-6/overview"},{"provider":"AWS Bedrock (InvokeModel)","model_id":"anthropic.claude-sonnet-4-6","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-on-amazon-bedrock-legacy"},{"provider":"Google Cloud Vertex AI","model_id":"claude-sonnet-4-6","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai"},{"provider":"Microsoft Foundry (Azure)","model_id":"claude-sonnet-4-6","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry"},{"provider":"Claude Platform on AWS","model_id":"claude-sonnet-4-6","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws"},{"provider":"OpenRouter","model_id":"anthropic/claude-sonnet-4.6","url":"https://openrouter.ai/anthropic/claude-sonnet-4.6"},{"provider":"Web app","url":"https://claude.ai"}],"capabilities":[{"name":"Human-level computer use on common tasks","detail":"Anthropic cites human-level performance on tasks such as navigating complex spreadsheets and multi-step web forms (OSWorld).","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-sonnet-4-6"},{"name":"Beats previous Opus in user preference","detail":"Users preferred it to Opus 4.5 59% of the time on coding, citing less overengineering.","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-sonnet-4-6"},{"name":"1M context for Sonnet 4.6","detail":"1M-token context window (beta at launch).","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-sonnet-4-6"}],"entry":null,"notes":"Last model on the older tokenizer. Adaptive thinking (budget_tokens deprecated). Training data cutoff Jan 2026. Bedrock via InvokeModel. Retirement not sooner than 2027-02-17.","verified":"2026-09-29","body_md":"Legacy Sonnet; migrate to `claude-sonnet-5-5`.\n\n```bash\ncurl https://api.anthropic.com/v1/messages \\\n -H \"x-api-key: $ANTHROPIC_API_KEY\" -H \"anthropic-version: 2023-06-01\" -H \"content-type: application/json\" \\\n -d '{\"model\":\"claude-sonnet-4-6\",\"max_tokens\":16000,\"messages\":[{\"role\":\"user\",\"content\":\"Hello\"}]}'\n```\n\nSources:\n- Model page: https://platform.claude.com/docs/en/models/sonnet-4-6/overview\n- Announcement: https://www.anthropic.com/news/claude-sonnet-4-6\n- Pricing: https://platform.claude.com/docs/en/about-claude/pricing\n- Models overview: https://platform.claude.com/docs/en/about-claude/models/overview\n- Deprecations: https://platform.claude.com/docs/en/about-claude/model-deprecations","page_url":"https://postcutoff.com/m/claude-sonnet-4-6/","events_after":2002,"major_after":461,"historic_after":87,"missing_at_launch":73,"events_since_release":null,"you_url":"https://postcutoff.com/you/claude-sonnet-4-6/","briefings":{"xs":"https://postcutoff.com/briefings/cutoff-2025-08-xs.md","s":"https://postcutoff.com/briefings/cutoff-2025-08-s.md","m":"https://postcutoff.com/briefings/cutoff-2025-08-m.md","full":"https://postcutoff.com/briefings/cutoff-2025-08.md"}}