Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Sibling matchup inside the GLM-5 family.
GLM-5.1
74
GLM-5.2
94
Verified leaderboard positions: GLM-5.1 #30 · GLM-5.2 #9
GLM-5.1 makes more sense if you want this variant’s specific profile, while GLM-5.2 is the cleaner fit if agentic is the priority or you need the larger 1M context window.
Agentic
+15.7 difference
Coding
+1.2 difference
Knowledge
+14.9 difference
GLM-5.1
GLM-5.2
$1.4 / $4.4
$1.4 / $4.4
N/A
N/A
N/A
N/A
203K
1M
GLM-5.1 makes more sense if you want this variant’s specific profile, while GLM-5.2 is the cleaner fit if agentic is the priority or you need the larger 1M context window.
GLM-5.1 and GLM-5.2 sit in the same GLM-5 family. This page is less about two unrelated model lineages and more about how the siblings trade off on benchmark shape, token costs, and practical limits like context window.
GLM-5.2 is clearly ahead on the provisional aggregate, 94 to 74. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GLM-5.2's sharpest advantage is in agentic, where it averages 81 against 65.3. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 63.5% to 81%.
GLM-5.2 gives you the larger context window at 1M, compared with 203K for GLM-5.1.
GLM-5.1 and GLM-5.2 are sibling variants in the GLM-5 family, so the right pick depends on whether you value the better benchmark line, cheaper tokens, or the larger context window. GLM-5.2 is ahead on BenchLM's provisional leaderboard 94 to 74.
GLM-5.2 has the edge for knowledge tasks in this comparison, averaging 67.2 versus 52.3. Inside this category, GPQA-D is the benchmark that creates the most daylight between them.
GLM-5.2 has the edge for coding in this comparison, averaging 62.1 versus 60.9. Inside this category, NL2Repo is the benchmark that creates the most daylight between them.
GLM-5.2 has the edge for agentic tasks in this comparison, averaging 81 versus 65.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Estimates at 50,000 req/day · 1000 tokens/req average.
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