{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/claude-opus-5/","md":"https://postcutoff.com/m/claude-opus-5/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-opus-5","name":"Claude Opus 5","org":"Anthropic","family":"Claude 5","released":"2026-07-24","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":"2026-05","pricing":{"input":5,"output":25,"cache_read":0.5,"unit":"per 1M tokens (USD); Batch API 50% off","source":"https://platform.claude.com/docs/en/about-claude/pricing"},"price_line":"$5 in, $25 out per 1M tokens","access":[{"provider":"Anthropic API (Claude API)","model_id":"claude-opus-5","endpoint":"https://api.anthropic.com/v1/messages","docs":"https://platform.claude.com/docs/en/models/opus-5/overview"},{"provider":"AWS Bedrock (Messages API / Mantle)","model_id":"anthropic.claude-opus-5","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-in-amazon-bedrock"},{"provider":"Google Cloud Vertex AI","model_id":"claude-opus-5","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-on-vertex-ai"},{"provider":"Microsoft Foundry (Azure)","model_id":"claude-opus-5","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-in-microsoft-foundry"},{"provider":"Claude Platform on AWS","model_id":"claude-opus-5","docs":"https://platform.claude.com/docs/en/build-with-claude/claude-platform-on-aws"},{"provider":"OpenRouter","model_id":"anthropic/claude-opus-5","url":"https://openrouter.ai/anthropic/claude-opus-5"},{"provider":"Web app","url":"https://claude.ai"}],"capabilities":[{"name":"Novel problem solving (ARC-AGI 3)","detail":"Anthropic says it scored about 3x as high as competing models on ARC-AGI 3.","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-opus-5"},{"name":"Near-Fable coding at half the price","detail":"Launch claim: more than doubles Opus 4.8 on Frontier-Bench and beats Fable 5 on OSWorld 2.0 at about a third of the cost.","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-opus-5"},{"name":"Self-built tooling","detail":"In one demo it wrote its own vision pipeline to solve a FreeCAD reconstruction task.","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-opus-5"},{"name":"Thinking on by default","detail":"First Opus where omitting the thinking parameter runs adaptive thinking.","first":true,"discovered":"launch","source":"https://platform.claude.com/docs/en/models/opus-5/overview"}],"entry":null,"notes":"Superseded by claude-opus-5-5 (cheaper). Thinking on by default; {type: disabled} allowed only at effort high or below. Fast mode $10/$50 (Claude API only). Retirement not sooner than 2027-07-24.","verified":"2026-09-29","body_md":"Previous Opus. Migrate to `claude-opus-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-opus-5\",\"max_tokens\":16000,\"messages\":[{\"role\":\"user\",\"content\":\"Hello\"}]}'\n```\n\nSources:\n- Model page: https://platform.claude.com/docs/en/models/opus-5/overview\n- Announcement: https://www.anthropic.com/news/claude-opus-5\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-opus-5/","events_after":1829,"major_after":419,"historic_after":82,"missing_at_launch":95,"events_since_release":null,"you_url":"https://postcutoff.com/you/claude-opus-5/","briefings":{"xs":"https://postcutoff.com/briefings/cutoff-2026-05-xs.md","s":"https://postcutoff.com/briefings/cutoff-2026-05-s.md","m":"https://postcutoff.com/briefings/cutoff-2026-05-m.md","full":"https://postcutoff.com/briefings/cutoff-2026-05.md"}}