Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GLM-5.1
74
GPT-5.2
79
Verified leaderboard positions: GLM-5.1 #30 · GPT-5.2 unranked
Pick GPT-5.2 if you want the stronger benchmark profile. GLM-5.1 only becomes the better choice if agentic is the priority or you want the cheaper token bill.
Agentic
+10.1 difference
Coding
+3.8 difference
Knowledge
+40.1 difference
GLM-5.1
GPT-5.2
$1.4 / $4.4
$1.75 / $14
N/A
73 t/s
N/A
130.34s
203K
400K
Pick GPT-5.2 if you want the stronger benchmark profile. GLM-5.1 only becomes the better choice if agentic is the priority or you want the cheaper token bill.
GPT-5.2 is clearly ahead on the provisional aggregate, 79 to 74. 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 52.3. The single biggest benchmark swing on the page is SWE-bench Pro, 58.4% to 55.6%. GLM-5.1 does hit back in agentic, 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 $1.40 input / $4.40 output per 1M tokens for GLM-5.1. That is roughly 3.2x on output cost alone. GPT-5.2 gives you the larger context window at 400K, compared with 203K for GLM-5.1.
GPT-5.2 is ahead on BenchLM's provisional leaderboard, 79 to 74. The biggest single separator in this matchup is SWE-bench Pro, where the scores are 58.4% and 55.6%.
GPT-5.2 has the edge for knowledge tasks in this comparison, averaging 92.4 versus 52.3. Inside this category, AA-Omniscience Hallucination Rate 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 60.9. Inside this category, Vibe Code Bench is the benchmark that creates the most daylight between them.
GLM-5.1 has the edge for agentic tasks in this comparison, averaging 65.3 versus 55.2. Inside this category, Gert Labs is the benchmark that creates the most daylight between them.
Estimates at 50,000 req/day · 1000 tokens/req average.
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