Anthropic: Claude Sonnet 4.6
Analysis Summary
Claude Sonnet 4.6 is Anthropic's mid-tier flagship at the time of its release, with an intelligence index of 47.2 and a coding index of 63. It supports vision, file input, tool use, and function calling across a 1 million token context window. The LCR of 0.707 and IFBench of 0.566 confirm strong long-context and instruction-following performance, while the tau2 of 0.757 reflects reliable task completion.
For businesses, Sonnet 4.6 is a strong fit for client-facing content generation, long-document analysis, coding assistance, and agentic workflows where Anthropic's reliability and safety posture matter. The agentic index of 64.4 is solid for multi-step automation. At $3 input and $15 output per million tokens, it is more accessible than Opus-tier models while delivering near-flagship reasoning.
A well-rounded production model for teams already in the Anthropic ecosystem, offering a strong balance of reasoning depth, multimodal capability, and cost relative to the Opus tier.
Assessed June 30, 2026
Editorial notes
Claude Sonnet 4.6 from Anthropic leads on instruction following and long-context reliability, with a 47.2 intelligence index, 1M token context, vision, and strong agentic performance at $3 input.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How Anthropic: Claude Sonnet 4.6 compares
Anthropic: Claude Sonnet 4.6 ranks #12 of 385 AI models we track for overall intelligence, #13 of 129 for coding, #45 of 293 for agentic tasks. Its 1M-token context window is larger than 91% of the models we list. At $3.00 per million input tokens it is cheaper than 10% of comparable models.
About Anthropic: Claude Sonnet 4.6
Sonnet 4.6 is Anthropic's most capable Sonnet-class model yet, with frontier performance across coding, agents, and professional work. It excels at iterative development, complex codebase navigation, end-to-end project management with..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does Anthropic: Claude Sonnet 4.6 stack up?
Compare side-by-side with other frontier models.
Model Information
| OpenRouter ID |
anthropic/claude-sonnet-4.6
|
| Provider | anthropic |
| Release Date | February 17, 2026 |
| Context Length | 1,000,000 tokens |
| Max Completion | 128,000 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $3.00 | $0.003000 |
| Output | $15.00 | $0.015000 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about Anthropic: Claude Sonnet 4.6
How much does Anthropic: Claude Sonnet 4.6 cost?
Anthropic: Claude Sonnet 4.6 costs $3.00 per million input tokens and $15.00 per million output tokens.
What is the context window of Anthropic: Claude Sonnet 4.6?
Anthropic: Claude Sonnet 4.6 has a context window of 1,000,000 tokens (1M).
Is Anthropic: Claude Sonnet 4.6 good for coding?
On our coding benchmark index, Anthropic: Claude Sonnet 4.6 ranks #13 of 129 models, placing it in the top quartile of the field for code generation and debugging.
What can Anthropic: Claude Sonnet 4.6 do?
Anthropic: Claude Sonnet 4.6 supports image/vision input, tool use, and function calling.
Who created Anthropic: Claude Sonnet 4.6?
Anthropic: Claude Sonnet 4.6 is developed by Anthropic and was released on February 17, 2026.
