ResearchNovember 28, 20246 min read
Claude 3.5 Sonnet: A Deep Benchmark Analysis
We ran extensive benchmarks comparing Claude 3.5 Sonnet against GPT-4 and other leading models. Here are our findings.
David Park
ML Research Lead

Claude 3.5 Sonnet: A Deep Benchmark Analysis
Anthropic's Claude 3.5 Sonnet has quickly become one of our most requested models. We conducted extensive benchmarks to help our users understand where it excels.
Methodology
We tested across multiple dimensions:
- Reasoning: Complex multi-step problems
- Coding: Generation, debugging, and explanation
- Creative Writing: Style, coherence, and originality
- Instruction Following: Adherence to detailed specifications
- Speed: Tokens per second and time to first token
Key Findings
Reasoning
Claude 3.5 Sonnet shows exceptional performance on reasoning tasks, matching or exceeding GPT-4 on most benchmarks while being significantly faster.
Coding
Particularly strong in:
- Python and JavaScript generation
- Bug identification and fixing
- Code explanation and documentation
Speed
- Average: 1,100 tokens/second
- Time to first token: 12ms average
This makes it one of the fastest frontier models available.
Recommendations
Based on our analysis:
- Use Claude 3.5 Sonnet for: Code generation, document analysis, structured data extraction
- Consider GPT-4 for: Tasks requiring the latest knowledge, specific formatting requirements
- Use Gemini 1.5 Pro for: Very long context tasks (1M+ tokens)
Conclusion
Claude 3.5 Sonnet represents an excellent balance of capability and speed. For many use cases, it's now our recommended default model.