Noometry

Model comparison

GPT-5.5 Pro vs Laguna XS.2

GPT-5.5 Pro has enough public results to be ranked (#7); Laguna XS.2 does not yet, so treat this comparison as directional.

Last verified . 0 shared benchmarks.

GPT-5.5 Pro OpenAI

64.3

Rank #7 Confirmed

Laguna XS.2 Poolside

32.5

Unranked Sparse

Summary

  • The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 20.3.
  • Laguna XS.2 has downloadable open weights; the other is API-only.

Side by side

GPT-5.5 ProLaguna XS.2
ProviderOpenAIPoolside
Noometry Index64.332.5
Released2026-04-232026-04-28
WeightsProprietaryOpen
Context window1.05M—
Max output128K—
Input $ / M tokens$30—
Output $ / M tokens$180—
Results tracked142

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Category by category

Coding Not comparable

GPT-5.5 Pro: —, Laguna XS.2: 34.1

BenchmarkGPT-5.5 ProLaguna XS.2
LMArena WebDev—1302

Reasoning Not comparable

GPT-5.5 Pro: 73.6 (#7), Laguna XS.2: —

BenchmarkGPT-5.5 ProLaguna XS.2
ARC-AGI-284.6%—
SimpleBench76.9%—
ARC-AGI-196.5%—
CritPt30.6%—
Chess Puzzles64%—
DTBench96%—
LMCA53.9%—
Epoch Capabilities Index162.45—

Math GPT-5.5 Pro leads

GPT-5.5 Pro: 83.8 (#8), Laguna XS.2: 20.3

BenchmarkGPT-5.5 ProLaguna XS.2
FrontierMath (Tiers 1-3)87.7%—
FrontierMath Tier 478%—
OTIS Mock AIME 2024-2025100%—
ProofBench—0%
FrontierMath (Feb 2025 set)52.4%—
FrontierMath Tier 4 (v1)39.6%—

Knowledge Not comparable

GPT-5.5 Pro: 64.2 (#17), Laguna XS.2: —

BenchmarkGPT-5.5 ProLaguna XS.2
GPQA Diamond93.9%—

Frequently asked questions

Is GPT-5.5 Pro better than Laguna XS.2?

GPT-5.5 Pro has enough public results to be ranked (#7); Laguna XS.2 does not yet, so treat this comparison as directional.

How many benchmarks do GPT-5.5 Pro and Laguna XS.2 share?

0 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Laguna XS.2 has 2.

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