Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Composer 2
71
LongCat-2.0
80
Pick LongCat-2.0 if you want the stronger benchmark profile. Composer 2 only becomes the better choice if you want the cheaper token bill.
Agentic
+9.1 difference
Coding
+1.5 difference
Composer 2
LongCat-2.0
$0.5 / $2.5
$0.75 / $2.95
N/A
N/A
N/A
N/A
200K
1M
Pick LongCat-2.0 if you want the stronger benchmark profile. Composer 2 only becomes the better choice if you want the cheaper token bill.
LongCat-2.0 is clearly ahead on the provisional aggregate, 80 to 71. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
LongCat-2.0's sharpest advantage is in agentic, where it averages 70.8 against 61.7. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 61.7% to 70.8%.
LongCat-2.0 is also the more expensive model on tokens at $0.75 input / $2.95 output per 1M tokens, versus $0.50 input / $2.50 output per 1M tokens for Composer 2. LongCat-2.0 gives you the larger context window at 1M, compared with 200K for Composer 2.
LongCat-2.0 is ahead on BenchLM's provisional leaderboard, 80 to 71. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 61.7% and 70.8%.
LongCat-2.0 has the edge for coding in this comparison, averaging 59.5 versus 58. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
LongCat-2.0 has the edge for agentic tasks in this comparison, averaging 70.8 versus 61.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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