Side-by-side comparison of pricing, 12 benchmarks, and generation speed.
| Metric | Qwen3.5 397B A17B (Reasoning) | DeepSeek V4 Pro (Reasoning, High Effort) |
|---|---|---|
| Input ($/M tokens) | $0.6 | $1.74 |
| Output ($/M tokens) | $3.6 | $3.48 |
Data from Artificial Analysis API — 12 benchmarks
Qwen3.5 397B A17B (Reasoning) is cheaper overall. Its blended price (3:1 input/output ratio) is $1.35/M tokens vs $2.17/M for DeepSeek V4 Pro (Reasoning, High Effort).
DeepSeek V4 Pro (Reasoning, High Effort) wins 6 out of 12 benchmarks compared to 1 for Qwen3.5 397B A17B (Reasoning). See the detailed benchmark chart above for per-category results.
Qwen3.5 397B A17B (Reasoning) generates tokens faster at 51 tok/s vs 31 tok/s. However, DeepSeek V4 Pro (Reasoning, High Effort) has lower time-to-first-token (1.06s vs 1.85s).
Choose based on your priorities: Qwen3.5 397B A17B (Reasoning) for lower cost, DeepSeek V4 Pro (Reasoning, High Effort) for stronger benchmark performance, and Qwen3.5 397B A17B (Reasoning) for faster generation. For latency-sensitive apps, check the TTFT comparison above.