Claude Sonnet 5.5 vs DeepSeek V4 Pro
Compare Claude Sonnet 5.5 vs DeepSeek V4 Pro API pricing, token costs, context windows, and latency. See which model is cheaper and better for your stack.
Claude Sonnet 5.5 charges $2.00/1M input and $10.00/1M output tokens, compared to DeepSeek V4 Pro at $0.66/1M input and $1.98/1M output. DeepSeek V4 Pro is 3.0x cheaper on input tokens. In reasoning benchmarks, Claude Sonnet 5.5 holds the higher AA Intelligence Index rating (55/100). For latency-critical streaming, Claude Sonnet 5.5 delivers 156 t/s (247.0s TTFT) while DeepSeek V4 Pro provides 80 t/s (59.0s TTFT).
Full Metric & Specification Comparison
| Metric | Claude Sonnet 5.5 | DeepSeek V4 Pro | Advantage |
|---|---|---|---|
| Provider | Anthropic | DeepSeek | - |
| Input Token Cost (1M) | $2.000 | $0.660 | DeepSeek V4 Pro |
| Output Token Cost (1M) | $10.000 | $1.980 | DeepSeek V4 Pro |
| Context Window | 1,000k tokens | 1,000k tokens | Tie |
| AA Intelligence Index | 55/100 | 23/100 | Claude Sonnet 5.5 |
| Streaming Latency | Fast | Moderate | - |
Key Architectural Takeaways
- Input Token Cost: Claude Sonnet 5.5 is $2.00/1M vs DeepSeek V4 Pro at $0.66/1M
- Output Token Cost: Claude Sonnet 5.5 is $10.00/1M vs DeepSeek V4 Pro at $1.98/1M
- Context Window: Claude Sonnet 5.5 supports 1,000k tokens vs DeepSeek V4 Pro with 1,000k tokens
- Benchmark Intelligence Rating: Claude Sonnet 5.5 scores 55/100 vs DeepSeek V4 Pro at 23/100 (AA Index v5)
- Inference Latency: Claude Sonnet 5.5 is rated Fast vs DeepSeek V4 Pro rated Moderate
Calculate Your Team's Exact Bill Difference
Drag the sliders below to see real-time cost divergences based on your daily token consumption.
Deploying DeepSeek V4 Pro over Claude Sonnet 5.5 saves $80.25/mo ($963/yr) at this volume.
Frequently Asked Questions
Is Claude Sonnet 5.5 cheaper than DeepSeek V4 Pro?
DeepSeek V4 Pro is significantly more economical, charging $0.66/1M input compared to $2.00/1M for Claude Sonnet 5.5.
Which model should I choose for production?
If your primary constraint is API cost and high query throughput, choose DeepSeek V4 Pro. If you require peak reasoning accuracy and complex tool use, Claude Sonnet 5.5 is recommended.
How does context window compare between Claude Sonnet 5.5 and DeepSeek V4 Pro?
Claude Sonnet 5.5 offers the larger context window (1,000k tokens), allowing you to pass significantly larger codebases or documents without chunking.
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