Claude 3.5 Sonnet vs DeepSeek R1
Performance benchmarks + pricing comparison — updated April 2026
Claude 3.5 Sonnet
AnthropicPrevious generation Sonnet. Still excellent for coding tasks at the same price point.
| Input | $3.00/M |
| Output | $15.00/M |
| Context | 200K tokens |
| Best For | Coding assistants, web development, data analysis |
| Benchmark | 72/100 |
DeepSeek R1
DeepSeekDeepSeek's reasoning model. Open-weight model that rivals o1 for complex reasoning tasks.
| Input | $0.140/M |
| Output | $0.550/M |
| Context | 128K tokens |
| Best For | Math, coding, science reasoning at low cost |
Cost Comparison by Scenario
Estimated cost per project with 30% cache hit rate. Actual costs may vary based on usage patterns.
| Scenario | Claude 3.5 Sonnet | DeepSeek R1 | Savings |
|---|---|---|---|
| Small Script (1K lines) | $0.62 | $0.02 | DeepSeek R1 saves $0.59 (97%) |
| Medium Feature (10K lines) | $4.66 | $0.16 | DeepSeek R1 saves $4.50 (97%) |
| Large Project (50K lines) | $23.29 | $0.80 | DeepSeek R1 saves $22.49 (97%) |
| Code Review (5K lines) | $1.20 | $0.04 | DeepSeek R1 saves $1.17 (97%) |
Verdict
DeepSeek R1 wins on both price and performance — $0.140/M input with a benchmark score of N/A/100.
For most developers, this is the clear choice between these two models.
Compare with Other Models
Claude Sonnet 4
AnthropicAnthropic's balanced model for coding and general tasks. Best price-performance ratio in the Claude family.
Claude Opus 4
AnthropicAnthropic's most powerful model. Best for complex reasoning and challenging coding tasks.
Claude 3.5 Haiku
AnthropicFast, cost-effective model for high-volume tasks. Great for code review and simple queries.
Claude 3 Opus
AnthropicFirst generation Opus. Highest reasoning capability in the Claude 3 family.
Claude 3 Sonnet
AnthropicFirst generation Sonnet. Balanced performance for general tasks.
Claude 3 Haiku
AnthropicCheapest Claude model. Fast responses for simple tasks and basic coding.