Claude Opus 4.6
Flagshipby Anthropic
Claude Opus 4.6 was Anthropic's flagship until April 17, 2026, when Opus 4.7 succeeded it with a 1 million token context window at the same price. 4.6 remains available on the API and still leads on many reasoning and code benchmarks. It ships with a 200K context window, full tool use, and vision, and is a solid choice for workloads that do not need the larger context.
Input Price
$15.00
per 1M tokens
Output Price
$75.00
per 1M tokens
Context Window
200K
tokens
Released
2026-03
API access
Capabilities
Key Strengths
- ✓Previous-gen flagship, still strong
- ✓Top-tier reasoning
- ✓Best-in-class code generation
- ✓200K context window
Best For
- ▸Complex analysis and research
- ▸Large codebase refactoring
- ▸Multi-step agent workflows
- ▸Long document processing
Benchmark Scores
| Benchmark | Score | Description |
|---|---|---|
| MMLU-Pro | 92.4 | General knowledge and reasoning across 57 subjects |
| HumanEval | 95.1 | Python code generation and problem solving |
| GPQA Diamond | 74.2 | Graduate-level science questions verified by domain experts |
| MATH | 91.8 | Competition-level mathematics problems |
| SWE-bench | 62.3 | Real-world software engineering tasks from GitHub issues |
Scores sourced from public benchmark datasets. See full benchmark leaderboard for all models.
Pricing Details
Input tokens
$15.00
per 1M tokens
Output tokens
$75.00
per 1M tokens
Estimated cost per 1K requests
$52.50
~1K input + ~500 output tokens avg
Prices are subject to change. Check the official documentation for current pricing. See the cost calculator for detailed estimates.
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