Claude Opus 4.6
claude-opus-4-6
Anthropic · reasoning · api · seen 12m ago
Context
1M
Max output
128K
Input $/1M
$5.00
Output $/1M
$25.00
Modalities
text · image · document
Released
04 Feb 2026
AI summary
● machine-written
Claude Opus 4.6: Anthropic's 1M-token Opus model
Claude Opus 4.6 is Anthropic's upgraded Opus-class model featuring a 1M token context window and improved coding and reasoning capabilities. It is available via API, Claude Platform, and major cloud partners at standard pricing. The model excels at agentic coding, financial analysis, and complex multi-step reasoning tasks.
What's new
- 1M token context window for Opus-class models
- Improved agentic coding and long-horizon task execution
- Adaptive thinking that adjusts reasoning depth by context
- State-of-the-art performance on Terminal-Bench 2.0 and Humanity's Last Exam
- New effort parameter to control reasoning depth and cost
Best for
Agentic coding and system automationComplex financial and legal analysisMulti-step reasoning and planning tasksLong-context document and codebase work
Source: https://docs.claude.com/en/docs/about-claude/models/overview