Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.5
93
Laguna XS.2
32
Verified leaderboard positions: GPT-5.5 #3 · Laguna XS.2 unranked
Pick GPT-5.5 if you want the stronger benchmark profile. Laguna XS.2 only becomes the better choice if you want the cheaper token bill.
Agentic
+51.7 difference
Coding
+5.3 difference
GPT-5.5
Laguna XS.2
$5 / $30
$0 / $0
N/A
N/A
N/A
N/A
1M
131K
Pick GPT-5.5 if you want the stronger benchmark profile. Laguna XS.2 only becomes the better choice if you want the cheaper token bill.
GPT-5.5 is clearly ahead on the provisional aggregate, 93 to 32. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5's sharpest advantage is in agentic, where it averages 81.8 against 30.1. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 82.7% to 30.1%.
GPT-5.5 is also the more expensive model on tokens at $5.00 input / $30.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Laguna XS.2. That is roughly Infinityx on output cost alone. GPT-5.5 gives you the larger context window at 1M, compared with 131K for Laguna XS.2.
GPT-5.5 is ahead on BenchLM's provisional leaderboard, 93 to 32. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 82.7% and 30.1%.
GPT-5.5 has the edge for coding in this comparison, averaging 58.6 versus 53.3. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
GPT-5.5 has the edge for agentic tasks in this comparison, averaging 81.8 versus 30.1. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
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