Claude Sonnet 4 vs DeepSeek R1
Detailed pricing comparison and cost analysis.
Updated September 2026
Cost Simulator
| Feature | Claude Sonnet 4 | DeepSeek R1 |
|---|---|---|
| Provider | Anthropic | DeepSeek |
| Input Price (1M) | $3.00 | $0.28 |
| Output Price (1M) | $15.00 | $0.42 |
| Context Window | 200,000 | 64,000 |
Verdict
Claude Sonnet 4 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens. DeepSeek R1 costs $0.28 per 1M input tokens and $0.42 per 1M output tokens. DeepSeek R1 is 91% cheaper on input tokens than Claude Sonnet 4. For output tokens, DeepSeek R1 is the more affordable option at $0.42/1M vs $15.00.
On context window, Claude Sonnet 4 supports 200,000 tokens — meaning it can fit more conversation history, documents, or code in a single request. This matters for RAG pipelines, long document analysis, and agentic workflows where context builds up over many turns.
When to choose Claude Sonnet 4
- ✓ You need a larger context window (200,000 tokens)
- ✓ You are already integrated with Anthropic
When to choose DeepSeek R1
- ✓ You need the lowest input token cost ($ 0.28/1M)
- ✓ Your workload is output-heavy — DeepSeek R1 generates text cheaper
- ✓ You are already integrated with DeepSeek
Use the calculator above to simulate your specific workload and find the exact break-even point. For most applications, the cheapest model is the one that minimises your total monthly bill given your input-to-output token ratio.
Frequently Asked Questions
Is Claude Sonnet 4 cheaper than DeepSeek R1? ▼
DeepSeek R1 is cheaper on input tokens at $0.28/1M vs $3.00/1M for Claude Sonnet 4 — a 91% saving.
What is the context window of Claude Sonnet 4 vs DeepSeek R1? ▼
Claude Sonnet 4 has a 200,000-token context window. DeepSeek R1 has a 64,000-token context window. Claude Sonnet 4 supports the larger context, suitable for longer documents and agentic workflows.
Which model is better: Claude Sonnet 4 or DeepSeek R1? ▼
The best choice depends on your use case. For cost efficiency on input tokens, DeepSeek R1 is the cheaper option. For maximum context length, Claude Sonnet 4 supports 200,000 tokens. Use the comparison table above to find the right fit for your workload.