Head-to-head comparison across 4benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Opus 4.6
91
Qwen3.5 397B
66
Verified leaderboard positions: Claude Opus 4.6 #3 · Qwen3.5 397B #10
Pick Claude Opus 4.6 if you want the stronger benchmark profile. Qwen3.5 397B only becomes the better choice if multimodal & grounded is the priority or you want the cheaper token bill.
Agentic
+16.4 difference
Coding
+4.1 difference
Knowledge
+11.0 difference
Multimodal
+1.7 difference
Claude Opus 4.6
Qwen3.5 397B
$5 / $25
$0 / $0
40 t/s
96 t/s
1.78s
2.44s
1M
128K
Pick Claude Opus 4.6 if you want the stronger benchmark profile. Qwen3.5 397B only becomes the better choice if multimodal & grounded is the priority or you want the cheaper token bill.
Claude Opus 4.6 is clearly ahead on the provisional aggregate, 91 to 66. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude Opus 4.6's sharpest advantage is in agentic, where it averages 72.6 against 56.2. The single biggest benchmark swing on the page is SuperGPQA, 95% to 70.4%. Qwen3.5 397B does hit back in multimodal & grounded, so the answer changes if that is the part of the workload you care about most.
Claude Opus 4.6 is also the more expensive model on tokens at $5.00 input / $25.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Qwen3.5 397B. That is roughly Infinityx on output cost alone. Claude Opus 4.6 gives you the larger context window at 1M, compared with 128K for Qwen3.5 397B.
Claude Opus 4.6 is ahead on BenchLM's provisional leaderboard, 91 to 66. The biggest single separator in this matchup is SuperGPQA, where the scores are 95% and 70.4%.
Claude Opus 4.6 has the edge for knowledge tasks in this comparison, averaging 76.2 versus 65.2. Inside this category, SuperGPQA is the benchmark that creates the most daylight between them.
Claude Opus 4.6 has the edge for coding in this comparison, averaging 64.4 versus 60.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Claude Opus 4.6 has the edge for agentic tasks in this comparison, averaging 72.6 versus 56.2. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
Qwen3.5 397B has the edge for multimodal and grounded tasks in this comparison, averaging 79 versus 77.3. Inside this category, ScreenSpot Pro is the benchmark that creates the most daylight between them.
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