Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
DeepSeek V4 Pro
71
Qwen3.5 397B
64
Verified leaderboard positions: DeepSeek V4 Pro #22 · Qwen3.5 397B #14
Pick DeepSeek V4 Pro if you want the stronger benchmark profile. Qwen3.5 397B only becomes the better choice if knowledge is the priority.
Agentic
+2.9 difference
Coding
+1.5 difference
Knowledge
+15.8 difference
DeepSeek V4 Pro
Qwen3.5 397B
$1.74 / $3.48
$0.6 / $3.6
N/A
96 t/s
N/A
2.44s
1M
128K
Pick DeepSeek V4 Pro if you want the stronger benchmark profile. Qwen3.5 397B only becomes the better choice if knowledge is the priority.
DeepSeek V4 Pro is clearly ahead on the provisional aggregate, 71 to 64. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
DeepSeek V4 Pro's sharpest advantage is in agentic, where it averages 59.1 against 56.2. The single biggest benchmark swing on the page is HLE, 7.7% to 28.7%. Qwen3.5 397B does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
Qwen3.5 397B is also the more expensive model on tokens at $0.60 input / $3.60 output per 1M tokens, versus $1.74 input / $3.48 output per 1M tokens for DeepSeek V4 Pro. DeepSeek V4 Pro gives you the larger context window at 1M, compared with 128K for Qwen3.5 397B.
DeepSeek V4 Pro is ahead on BenchLM's provisional leaderboard, 71 to 64. The biggest single separator in this matchup is HLE, where the scores are 7.7% and 28.7%.
Qwen3.5 397B has the edge for knowledge tasks in this comparison, averaging 65.2 versus 49.4. Inside this category, HLE is the benchmark that creates the most daylight between them.
Qwen3.5 397B has the edge for coding in this comparison, averaging 60.3 versus 58.8. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
DeepSeek V4 Pro has the edge for agentic tasks in this comparison, averaging 59.1 versus 56.2. Inside this category, MCP Atlas is the benchmark that creates the most daylight between them.
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