{"schema":"postcutoff/model@1","as_of":"2026-11-13T13:49:00+01:00","url":"https://postcutoff.com/m/claude-opus-4-1/","md":"https://postcutoff.com/m/claude-opus-4-1/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-4-1","name":"Claude Opus 4.1","org":"Anthropic","family":"Claude 4","released":"2025-08-05","status":"retired","type":"reasoning-llm","modality_in":["text","image","pdf"],"modality_out":["text"],"open_weights":false,"model_license":"proprietary","context_window":200000,"max_output":null,"knowledge_cutoff":null,"pricing":{"input":15,"output":75,"unit":"per 1M tokens (USD), Bedrock/Google Cloud may differ","source":"https://platform.claude.com/docs/en/about-claude/pricing"},"price_line":"$15 in, $75 out per 1M tokens","access":[{"provider":"Anthropic API (Claude API)","model_id":"claude-opus-4-1-20250805","endpoint":"https://api.anthropic.com/v1/messages","docs":"https://platform.claude.com/docs/en/about-claude/model-deprecations"},{"provider":"OpenRouter","model_id":"anthropic/claude-opus-4.1","url":"https://openrouter.ai/anthropic/claude-opus-4.1"}],"capabilities":[{"name":"SOTA SWE-bench Verified (Aug 2025)","detail":"74.5% on SWE-bench Verified at launch.","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-opus-4-1"},{"name":"Precise multi-file refactoring","detail":"GitHub and Rakuten highlighted multi-file refactoring and pinpoint fixes without unnecessary changes.","first":false,"discovered":"launch","source":"https://www.anthropic.com/news/claude-opus-4-1"}],"entry":null,"notes":"Retired on the Claude API 2026-08-05 (replacement claude-opus-4-8 / claude-opus-5-5); still available on Amazon Bedrock and Google Cloud per Anthropic pricing page. Cloud ids not re-verified today.","verified":"2026-09-29","body_md":"Retired on Anthropic-operated platforms; requests to `claude-opus-4-1-20250805` on the Claude API fail. Listed for reference because it may still be reachable via Bedrock, Google Cloud or OpenRouter.\n\nSources: https://platform.claude.com/docs/en/about-claude/model-deprecations , https://platform.claude.com/docs/en/about-claude/pricing","page_url":"https://postcutoff.com/m/claude-opus-4-1/","events_after":null,"major_after":null,"historic_after":null,"missing_at_launch":null,"events_since_release":2007,"you_url":null,"briefings":null}