Head-to-head comparison across 4benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.2
81
Qwen3.5-27B
63
Verified leaderboard positions: GPT-5.2 unranked · Qwen3.5-27B #16
Pick GPT-5.2 if you want the stronger benchmark profile. Qwen3.5-27B only becomes the better choice if reasoning is the priority or you want the cheaper token bill.
Agentic
+3.6 difference
Coding
+1.7 difference
Reasoning
+7.7 difference
Knowledge
+11.8 difference
GPT-5.2
Qwen3.5-27B
$1.75 / $14
$0 / $0
73 t/s
N/A
130.34s
N/A
400K
262K
Pick GPT-5.2 if you want the stronger benchmark profile. Qwen3.5-27B only becomes the better choice if reasoning is the priority or you want the cheaper token bill.
GPT-5.2 is clearly ahead on the provisional aggregate, 81 to 63. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.2's sharpest advantage is in knowledge, where it averages 92.4 against 80.6. The single biggest benchmark swing on the page is OSWorld-Verified, 47.3% to 56.2%. Qwen3.5-27B does hit back in reasoning, so the answer changes if that is the part of the workload you care about most.
GPT-5.2 is also the more expensive model on tokens at $1.75 input / $14.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Qwen3.5-27B. That is roughly Infinityx on output cost alone. GPT-5.2 gives you the larger context window at 400K, compared with 262K for Qwen3.5-27B.
GPT-5.2 is ahead on BenchLM's provisional leaderboard, 81 to 63. The biggest single separator in this matchup is OSWorld-Verified, where the scores are 47.3% and 56.2%.
GPT-5.2 has the edge for knowledge tasks in this comparison, averaging 92.4 versus 80.6. Inside this category, GPQA is the benchmark that creates the most daylight between them.
GPT-5.2 has the edge for coding in this comparison, averaging 64.7 versus 63. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Qwen3.5-27B has the edge for reasoning in this comparison, averaging 60.6 versus 52.9. GPT-5.2 stays close enough that the answer can still flip depending on your workload.
GPT-5.2 has the edge for agentic tasks in this comparison, averaging 55.2 versus 51.6. Inside this category, OSWorld-Verified is the benchmark that creates the most daylight between them.
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