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 memor…
Model details →Anthropic: Claude Sonnet 4.6 vs DeepSeek: R1
Anthropic: Claude Sonnet 4.6 and DeepSeek: R1 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
DeepSeek R1 is here: Performance on par with [OpenAI o1](/openai/o1), but open-sourced and with fully open reasoning tokens. It's 671B parameters in size, with 37B active in an inference pass. Fully open-source model & [technical report](h…
Model details →Side-by-side comparison
| Capability | Anthropic: Claude Sonnet 4.6 | DeepSeek: R1 | Winner |
|---|---|---|---|
| Context window Maximum number of input tokens the model can attend to in a single request. | 1M | 64K | 🏆 Anthropic: Claude Sonnet 4.6 |
| Input price (per 1M) Cost per million input tokens billed by the provider. | $3.00 | $0.70 | 🏆 DeepSeek: R1 |
| Output price (per 1M) Cost per million output tokens billed by the provider. | $15.00 | $2.50 | 🏆 DeepSeek: R1 |
| Tool / function calling First-class support for emitting structured tool calls. | Yes | Yes | Tie |
| Vision input Accepts image inputs alongside text. | Yes | — | 🏆 Anthropic: Claude Sonnet 4.6 |
| Reasoning mode Internal chain-of-thought / extended-thinking support. | Yes | Yes | Tie |
Frequently asked questions
Is Anthropic: Claude Sonnet 4.6 better than DeepSeek: R1?
Anthropic: Claude Sonnet 4.6 and DeepSeek: R1 are evenly matched on 6 axes — pick the one whose provider, latency, or licensing fits your stack.
What's the price difference between Anthropic: Claude Sonnet 4.6 and DeepSeek: R1?
Input: $3.00 vs $0.70 per 1M tokens. Output: $15.00 vs $2.50 per 1M tokens.
What context windows do Anthropic: Claude Sonnet 4.6 and DeepSeek: R1 support?
Anthropic: Claude Sonnet 4.6 supports up to 1M tokens. DeepSeek: R1 supports up to 64K tokens.
Do both Anthropic: Claude Sonnet 4.6 and DeepSeek: R1 support tool calling?
Anthropic: Claude Sonnet 4.6: yes. DeepSeek: R1: yes.