Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude 4 Sonnet
52
Qwen3.5 397B
66
Verified leaderboard positions: Claude 4 Sonnet unranked · Qwen3.5 397B #11
Pick Qwen3.5 397B if you want the stronger benchmark profile. Claude 4 Sonnet only becomes the better choice if coding is the priority or you need the larger 200K context window.
Coding
+12.4 difference
Claude 4 Sonnet
Qwen3.5 397B
$null / $null
$0 / $0
40 t/s
96 t/s
1.33s
2.44s
200K
128K
Pick Qwen3.5 397B if you want the stronger benchmark profile. Claude 4 Sonnet only becomes the better choice if coding is the priority or you need the larger 200K context window.
Qwen3.5 397B is clearly ahead on the provisional aggregate, 66 to 52. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Claude 4 Sonnet gives you the larger context window at 200K, compared with 128K for Qwen3.5 397B.
Qwen3.5 397B is ahead on BenchLM's provisional leaderboard, 66 to 52. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 72.7% and 76.2%.
Claude 4 Sonnet has the edge for coding in this comparison, averaging 72.7 versus 60.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
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