Noometry

Model comparison

Claude Sonnet 5 vs Laguna XS.2

Claude Sonnet 5 has enough public results to be ranked (#26); Laguna XS.2 does not yet, so treat this comparison as directional.

Last verified . 2 shared benchmarks.

Claude Sonnet 5 Anthropic

54.5

Rank #26 Confirmed

Laguna XS.2 Poolside

32.5

Unranked Sparse

Summary

  • They share 2 benchmarks with published results for both. Claude Sonnet 5 scores higher in 2 categories and Laguna XS.2 in 0 categories; 2 gaps are clear of the uncertainty.
  • The widest gap is in math, where Claude Sonnet 5 leads 66.1 to 20.3.
  • The biggest single-benchmark swing is ProofBench: 77% for Claude Sonnet 5 and 0% for Laguna XS.2.
  • Laguna XS.2 has downloadable open weights; the other is API-only.

Side by side

Claude Sonnet 5Laguna XS.2
ProviderAnthropicPoolside
Noometry Index54.532.5
Released2026-06-292026-04-28
WeightsProprietaryOpen
Context window1M—
Max output128K—
Input $ / M tokens$2—
Output $ / M tokens$10—
Results tracked512

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Category by category

Coding Claude Sonnet 5 leads

Claude Sonnet 5: 55.5 (#20), Laguna XS.2: 34.1

BenchmarkClaude Sonnet 5Laguna XS.2
LMArena WebDev15401302
DeepSWE53.8%—
FrontierCode42.7%—
CursorBench34.1%—
SciCode53.6%—
GSO37.3%—
WeirdML68.8%—
LMArena Coding1483—
ALE-Bench1,463—

Agentic & Tool Use Not comparable

Claude Sonnet 5: 42.7 (#16), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
APEX-Agents54.5%—
GBAEval65.3%—
LMArena Search1194—
Vending-Bench 26,378—

Reasoning Not comparable

Claude Sonnet 5: 48.2 (#37), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
SimpleBench60.6%—
NYT Connections (extended)75.1%—
CritPt16.9%—
Chess Puzzles35%—
LMArena Hard Prompts1461—
Mystery Game Puzzles35%—
DTBench92.5%—
LMCA50%—
Surface Evolver Bench60%—
Bench to the Future 30.14—
Epoch Capabilities Index156.34—
ForecastBench61.1—

Math Claude Sonnet 5 leads

Claude Sonnet 5: 66.1 (#21), Laguna XS.2: 20.3

BenchmarkClaude Sonnet 5Laguna XS.2
ProofBench77%0%
FrontierMath (Tiers 1-3)65.6%—
FrontierMath Tier 429.3%—
OTIS Mock AIME 2024-202594.7%—
LMArena Math1467—

Knowledge Not comparable

Claude Sonnet 5: 55.7 (#42), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
GPQA Diamond90.5%—
SimpleQA Verified33.7%—
LMArena Expert1491—

Multimodal Not comparable

Claude Sonnet 5: 42.4 (#26), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
LMArena Vision1275—
Blueprint-Bench 224.9%—
LMArena Document1466—

Multilingual Not comparable

Claude Sonnet 5: 54.0 (#55), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
LMArena Non-English1431—
LMArena Chinese1475—
LMArena French1457—
LMArena German1448—
LMArena Japanese1422—
LMArena Korean1411—
LMArena Russian1452—
LMArena Spanish1436—

Instruction Following Not comparable

Claude Sonnet 5: 76.6 (#39), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
LMArena Instruction Following1453—

Long Context Not comparable

Claude Sonnet 5: 44.8 (#53), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
LMArena Longer Query1464—

Writing & Preference Not comparable

Claude Sonnet 5: 69.4 (#24), Laguna XS.2: —

BenchmarkClaude Sonnet 5Laguna XS.2
LMArena Text1443—
LMArena Creative Writing1416—
EQ-Bench Creative Writing1794—
EQ-Bench 41236—
LMArena Multi-Turn1454—

Frequently asked questions

Is Claude Sonnet 5 better than Laguna XS.2?

Claude Sonnet 5 has enough public results to be ranked (#26); Laguna XS.2 does not yet, so treat this comparison as directional.

Is Claude Sonnet 5 or Laguna XS.2 better for coding?

Claude Sonnet 5 scores higher on coding benchmarks: 55.5 versus 34.1 in the Noometry coding category.

How many benchmarks do Claude Sonnet 5 and Laguna XS.2 share?

2 benchmarks have published results for both models. Claude Sonnet 5 has 51 scored results on Noometry and Laguna XS.2 has 2.

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