Claude Opus 4.6
First dateless-ID Opus; adaptive thinking (budget_tokens deprecated). Training data cutoff Aug 2025. Bedrock via InvokeModel only. Retirement not sooner than 2027-02-05.
- Context window
- 1,000,000 tokens
- Max output
- 128,000 tokens
- Knowledge cutoff
- 2025-05
- Input
- text, image, pdf
- Output
- text
- License
- proprietary
- Pricing
- input: $5 · output: $25 · cache read: $0.5 (per 1M tokens (USD); Batch API 50% off) source
- Verified
- 2026-09-29
How to call it
| Provider | Model id | Endpoint / URL | Docs |
|---|---|---|---|
| Anthropic API (Claude API) | claude-opus-4-6 | https://api.anthropic.com/v1/messages | docs |
| AWS Bedrock (InvokeModel) | anthropic.claude-opus-4-6-v1 | — | docs |
| Google Cloud Vertex AI | claude-opus-4-6 | — | docs |
| Microsoft Foundry (Azure) | claude-opus-4-6 | — | docs |
| Claude Platform on AWS | claude-opus-4-6 | — | docs |
| OpenRouter | anthropic/claude-opus-4.6 | openrouter.ai/anthropic/claude-opus-4.6 | — |
| Web app | — | claude.ai | — |
Notable capabilities (4)
- FIRST 1M-token context for Opus: First Opus with a 1M-token context window (launched in beta). Scored 76% on MRCR v2 long-context retrieval versus 18.5% for Sonnet 4.5. source
- FIRST Adaptive thinking: Introduced adaptive thinking: the model decides when and how much to think, steered by effort. source
- FIRST Agent teams: Research preview of multiple Claude instances coordinating in parallel (in Claude Code). source
- Knowledge work (GDPval-AA): About 144 Elo above GPT-5.2 on GDPval-AA. Also led Terminal-Bench 2.0 at launch. source
Legacy Opus; migrate to claude-opus-5-5.
curl https://api.anthropic.com/v1/messages \
-H "x-api-key: $ANTHROPIC_API_KEY" -H "anthropic-version: 2023-06-01" -H "content-type: application/json" \
-d '{"model":"claude-opus-4-6","max_tokens":16000,"messages":[{"role":"user","content":"Hello"}]}'
Sources:
- Model page: https://platform.claude.com/docs/en/models/opus-4-6/overview
- Announcement: https://www.anthropic.com/news/claude-opus-4-6
- Pricing: https://platform.claude.com/docs/en/about-claude/pricing
- Models overview: https://platform.claude.com/docs/en/about-claude/models/overview
- Deprecations: https://platform.claude.com/docs/en/about-claude/model-deprecations
Other Anthropic models
Claude Sonnet 5.5 · Claude Opus 5.5 · Claude Fable 5.1 · Claude Mythos 5.1 · Claude Haiku 4.5 · Claude Opus 5 · Claude Sonnet 5 · Claude Fable 5 · Claude Opus 4.8 · Claude Opus 4.7 · Claude Sonnet 4.6 · Claude Opus 4.5 · Claude Sonnet 4.5 · Claude Opus 4.1 · Claude Sonnet 4