Noometry

Model comparison

Claude Opus 4.5 vs Laguna XS.2

Claude Opus 4.5 has enough public results to be ranked (#39); Laguna XS.2 does not yet, so treat this comparison as directional.

Last verified . 2 shared benchmarks.

Claude Opus 4.5 Anthropic

50.5

Rank #39 Confirmed

Laguna XS.2 Poolside

32.5

Unranked Sparse

Summary

  • They share 2 benchmarks with published results for both. Claude Opus 4.5 scores higher in 2 categories and Laguna XS.2 in 0 categories; 2 gaps are clear of the uncertainty.
  • The widest gap is in coding, where Claude Opus 4.5 leads 55.4 to 34.1.
  • The biggest single-benchmark swing is ProofBench: 36% for Claude Opus 4.5 and 0% for Laguna XS.2.
  • Laguna XS.2 has downloadable open weights; the other is API-only.

Side by side

Claude Opus 4.5Laguna XS.2
ProviderAnthropicPoolside
Noometry Index50.532.5
Released2025-11-012026-04-28
WeightsProprietaryOpen
Context window200K—
Max output64K—
Input $ / M tokens$5—
Output $ / M tokens$25—
Results tracked692

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Category by category

Coding Claude Opus 4.5 leads

Claude Opus 4.5: 55.4 (#21), Laguna XS.2: 34.1

BenchmarkClaude Opus 4.5Laguna XS.2
LMArena WebDev14931302
SWE-bench Verified76.7%—
SWE-bench Verified (bash only)76.8%—
SWE-bench Multilingual70.7%—
GSO26.5%—
WeirdML63.7%—
LMArena Coding1504—
ALE-Bench1,025—
AlgoTune1.77—

Agentic & Tool Use Not comparable

Claude Opus 4.5: 47.2 (#11), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
Terminal-Bench63.1%—
Berkeley Function Calling Leaderboard77.5%—
GDPval45.5%—
Remote Labor Index3.8%—
τ²-bench Airline84%—
τ²-bench Banking24.7%—
τ²-bench Retail79.6%—
τ²-bench Telecom92.3%—
Cybench82%—
DeepResearch Bench54.8%—
OSWorld66.3%—
BALROG43.5%—
LMArena Search1180—
METR Time Horizons75%—
Vending-Bench 24,967—

Reasoning Not comparable

Claude Opus 4.5: 42.5 (#43), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
ARC-AGI-237.6%—
SimpleBench62%—
Kagi LLM Benchmark80.2%—
NYT Connections (extended)52.5%—
ARC-AGI-180%—
Chess Puzzles12%—
EnigmaEval11.9%—
EBR-Bench14.3%—
LMArena Hard Prompts1476—
Mystery Game Puzzles22%—
DTBench89.9%—
LMCA44.5%—
Epoch Capabilities Index150.1—
ForecastBench60.7—

Math Claude Opus 4.5 leads

Claude Opus 4.5: 38.5 (#85), Laguna XS.2: 20.3

BenchmarkClaude Opus 4.5Laguna XS.2
ProofBench36%0%
FrontierMath (Tiers 1-3)34.4%—
FrontierMath Tier 44.9%—
OTIS Mock AIME 2024-202586.1%—
LMArena Math1463—
FrontierMath (Feb 2025 set)20.7%—
FrontierMath Tier 4 (v1)4.2%—

Knowledge Not comparable

Claude Opus 4.5: 56.4 (#38), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
GPQA Diamond86%—
Humanity's Last Exam25.2%—
SimpleQA Verified45.7%—
Vectara Hallucination Rate10.9%—
LMArena Expert1488—

Multimodal Not comparable

Claude Opus 4.5: 31.1 (#99), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
GeoBench75%—
VPCT40%—
Furniture Assembly28.3%—
LMArena Document1462—

Multilingual Not comparable

Claude Opus 4.5: 54.5 (#45), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
LMArena Non-English1438—
LMArena Chinese1470—
LMArena French1471—
LMArena German1449—
LMArena Japanese1415—
LMArena Korean1424—
LMArena Russian1448—
LMArena Spanish1455—

Instruction Following Not comparable

Claude Opus 4.5: 77.7 (#20), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
LMArena Instruction Following1478—

Long Context Not comparable

Claude Opus 4.5: 46.4 (#21), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
CL-bench21.1%—
LMArena Longer Query1480—

Writing & Preference Not comparable

Claude Opus 4.5: 68.2 (#28), Laguna XS.2: —

BenchmarkClaude Opus 4.5Laguna XS.2
LMArena Text1451—
LMArena Creative Writing1445—
EQ-Bench Creative Writing1687—
LMArena Multi-Turn1466—

Frequently asked questions

Is Claude Opus 4.5 better than Laguna XS.2?

Claude Opus 4.5 has enough public results to be ranked (#39); Laguna XS.2 does not yet, so treat this comparison as directional.

Is Claude Opus 4.5 or Laguna XS.2 better for coding?

Claude Opus 4.5 scores higher on coding benchmarks: 55.4 versus 34.1 in the Noometry coding category.

How many benchmarks do Claude Opus 4.5 and Laguna XS.2 share?

2 benchmarks have published results for both models. Claude Opus 4.5 has 69 scored results on Noometry and Laguna XS.2 has 2.

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