Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude 3.5 Sonnet
40
GLM-5.2
94
Verified leaderboard positions: Claude 3.5 Sonnet unranked · GLM-5.2 #9
Pick GLM-5.2 if you want the stronger benchmark profile. Claude 3.5 Sonnet only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Coding
+13.1 difference
Knowledge
+7.8 difference
Claude 3.5 Sonnet
GLM-5.2
$3 / $15
$1.4 / $4.4
N/A
N/A
N/A
N/A
200K
1M
Pick GLM-5.2 if you want the stronger benchmark profile. Claude 3.5 Sonnet only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
GLM-5.2 is clearly ahead on the provisional aggregate, 94 to 40. 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 coding, where it averages 62.1 against 49. The single biggest benchmark swing on the page is GPQA, 59.4% to 91.2%.
Claude 3.5 Sonnet is also the more expensive model on tokens at $3.00 input / $15.00 output per 1M tokens, versus $1.40 input / $4.40 output per 1M tokens for GLM-5.2. That is roughly 3.4x on output cost alone. GLM-5.2 is the reasoning model in the pair, while Claude 3.5 Sonnet is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. GLM-5.2 gives you the larger context window at 1M, compared with 200K for Claude 3.5 Sonnet.
GLM-5.2 is ahead on BenchLM's provisional leaderboard, 94 to 40. The biggest single separator in this matchup is GPQA, where the scores are 59.4% and 91.2%.
GLM-5.2 has the edge for knowledge tasks in this comparison, averaging 67.2 versus 59.4. Inside this category, GPQA 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 49. Claude 3.5 Sonnet stays close enough that the answer can still flip depending on your workload.
For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.