DeepSeek V3 vs Qwen3.5 397B (Reasoning)

Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.

Qwen3.5 397B (Reasoning) is clearly ahead on the aggregate, 46 to 25. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

Qwen3.5 397B (Reasoning)'s sharpest advantage is in reasoning, where it averages 85.9 against 24.9. The single biggest benchmark swing on the page is SimpleQA, 24.9% to 87%.

Qwen3.5 397B (Reasoning) is the reasoning model in the pair, while DeepSeek V3 is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use.

Quick Verdict

Pick Qwen3.5 397B (Reasoning) if you want the stronger benchmark profile. DeepSeek V3 only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.

Agentic

Coming soon

Benchmark data for this category is coming soon.

Coding

Qwen3.5 397B (Reasoning)

DeepSeek V3

42

Qwen3.5 397B (Reasoning)

83

42%
SWE-bench Verified
Coming soon
Coming soon
HumanEval
83%

Multimodal & Grounded

Coming soon

Benchmark data for this category is coming soon.

Reasoning

Qwen3.5 397B (Reasoning)

DeepSeek V3

24.9

Qwen3.5 397B (Reasoning)

85.9

24.9%
SimpleQA
87%
Coming soon
MuSR
85%

Knowledge

Qwen3.5 397B (Reasoning)

DeepSeek V3

69.6

Qwen3.5 397B (Reasoning)

88

59.1%
GPQA
89%
88.5%
MMLU
91%
75.9%
MMLU-Pro
Coming soon
Coming soon
SuperGPQA
87%
Coming soon
OpenBookQA
85%

Instruction Following

Coming soon

Benchmark data for this category is coming soon.

Multilingual

Coming soon

Benchmark data for this category is coming soon.

Mathematics

Qwen3.5 397B (Reasoning)

DeepSeek V3

90.2

Qwen3.5 397B (Reasoning)

92

39.2%
AIME 2024
95%
90.2%
MATH-500
Coming soon
Coming soon
AIME 2023
93%
Coming soon
AIME 2025
94%
Coming soon
HMMT Feb 2023
89%
Coming soon
HMMT Feb 2024
91%
Coming soon
HMMT Feb 2025
90%
Coming soon
BRUMO 2025
92%

Frequently Asked Questions

Which is better, DeepSeek V3 or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) is ahead overall, 46 to 25. The biggest single separator in this matchup is SimpleQA, where the scores are 24.9% and 87%.

Which is better for knowledge tasks, DeepSeek V3 or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) has the edge for knowledge tasks in this comparison, averaging 88 versus 69.6. Inside this category, GPQA is the benchmark that creates the most daylight between them.

Which is better for coding, DeepSeek V3 or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) has the edge for coding in this comparison, averaging 83 versus 42. DeepSeek V3 stays close enough that the answer can still flip depending on your workload.

Which is better for math, DeepSeek V3 or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) has the edge for math in this comparison, averaging 92 versus 90.2. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.

Which is better for reasoning, DeepSeek V3 or Qwen3.5 397B (Reasoning)?

Qwen3.5 397B (Reasoning) has the edge for reasoning in this comparison, averaging 85.9 versus 24.9. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.

Last updated: March 17, 2026

Weekly LLM Benchmark Digest

Get notified when new models drop, benchmark scores change, or the leaderboard shifts. One email per week.

Free. No spam. Unsubscribe anytime. We only store derived location metadata for consent routing.