Model comparison
Claude Sonnet 5.5 vs Laguna XS.2
Claude Sonnet 5.5 has enough public results to be ranked (#10); Laguna XS.2 does not yet, so treat this comparison as directional.
Last verified . 2 shared benchmarks.
PoolsideSummary
- They share 2 benchmarks with published results for both. Claude Sonnet 5.5 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 5.5 leads 88.7 to 20.3.
- The biggest single-benchmark swing is ProofBench: 100% for Claude Sonnet 5.5 and 0% for Laguna XS.2.
- Laguna XS.2 has downloadable open weights; the other is API-only.
Side by side
| Claude Sonnet 5.5 | Laguna XS.2 | |
|---|---|---|
| Provider | Anthropic | Poolside |
| Noometry Index | 60.5 | 32.5 |
| Released | 2026-09-28 | 2026-04-28 |
| Weights | Proprietary | Open |
| Context window | 1M | — |
| Max output | 128K | — |
| Input $ / M tokens | $2 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 16 | 2 |
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Category by category
Coding Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 65.5 (#6), Laguna XS.2: 34.1
| Benchmark | Claude Sonnet 5.5 | Laguna XS.2 |
|---|---|---|
| LMArena WebDev | 1699 | 1302 |
| FrontierCode | 52.1% | — |
| CursorBench | 55.5% | — |
| FrontierSWE | 61.9% | — |
| SciCode | 61% | — |
| ALE-Bench | 1,819 | — |
Agentic & Tool Use Not comparable
Claude Sonnet 5.5: 44.9 (#14), Laguna XS.2: —
| Benchmark | Claude Sonnet 5.5 | Laguna XS.2 |
|---|---|---|
| APEX-Agents | 75.5% | — |
Reasoning Not comparable
Claude Sonnet 5.5: 52.4 (#29), Laguna XS.2: —
| Benchmark | Claude Sonnet 5.5 | Laguna XS.2 |
|---|---|---|
| CritPt | 31.4% | — |
| Mystery Game Puzzles | 65% | — |
Math Claude Sonnet 5.5 leads
Claude Sonnet 5.5: 88.7 (#4), Laguna XS.2: 20.3
| Benchmark | Claude Sonnet 5.5 | Laguna XS.2 |
|---|---|---|
| ProofBench | 100% | 0% |
| FrontierMath (Tiers 1-3) | 88.8% | — |
| FrontierMath Tier 4 | 80.5% | — |
| OTIS Mock AIME 2024-2025 | 100% | — |
Knowledge Not comparable
Claude Sonnet 5.5: 66.0 (#11), Laguna XS.2: —
| Benchmark | Claude Sonnet 5.5 | Laguna XS.2 |
|---|---|---|
| GPQA Diamond | 95.6% | — |
| SimpleQA Verified | 46.5% | — |
Multimodal Not comparable
Claude Sonnet 5.5: 53.2 (#5), Laguna XS.2: —
| Benchmark | Claude Sonnet 5.5 | Laguna XS.2 |
|---|---|---|
| Furniture Assembly | 75% | — |
Frequently asked questions
Is Claude Sonnet 5.5 better than Laguna XS.2?
Claude Sonnet 5.5 has enough public results to be ranked (#10); Laguna XS.2 does not yet, so treat this comparison as directional.
Is Claude Sonnet 5.5 or Laguna XS.2 better for coding?
Claude Sonnet 5.5 scores higher on coding benchmarks: 65.5 versus 34.1 in the Noometry coding category.
How many benchmarks do Claude Sonnet 5.5 and Laguna XS.2 share?
2 benchmarks have published results for both models. Claude Sonnet 5.5 has 16 scored results on Noometry and Laguna XS.2 has 2.