# Claude Sonnet 5 vs Laguna XS.2

> Side-by-side benchmark comparison for Claude Sonnet 5 and Laguna XS.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-sonnet-5-vs-laguna-xs-2
- Last updated: September 29, 2026

- Shared sourced benchmarks: 8
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

Pick Claude Sonnet 5 if you want the stronger benchmark profile. Laguna XS.2 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Claude Sonnet 5 leads overall 66.99 to 31.
- The clearest category separation is in coding, where the averages are 59.8 for Claude Sonnet 5 and 24.3 for Laguna XS.2.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 74.5% and 25.8%.
- Laguna XS.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Sonnet 5 also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Sonnet 5 | Laguna XS.2 |
|----------|----------|----------|
| Creator | Anthropic | Poolside |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 256K |
| Overall Score | 66.99 | null |
| Benchmarks Covered | 26 | 10 |
| Pricing (input/output) | $2.00 / $10.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- Claude Sonnet 5 public-lane score: 64.6 (Supported · #12/117)
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.6% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 80.4% | Coming soon | Coming soon |
| BrowseComp | 84.7% | Coming soon | Coming soon |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| OSWorld-Verified | 81.2% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 74.5% | 25.8% | Claude Sonnet 5 |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 35.7% | Coming soon |

### Coding

- Winner: Claude Sonnet 5
- Claude Sonnet 5 public-lane score: 59.8 (Supported · #19/142)
- Laguna XS.2 public-lane score: 24.3 (Supported · #108/142)

| Benchmark | Claude Sonnet 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 85.2% | 69.9% | Claude Sonnet 5 |
| SWE-bench Pro | 63.2% | 46.3% | Claude Sonnet 5 |
| SWE Multilingual | 78.3% | 57.7% | Claude Sonnet 5 |
| SWE Multimodal | 28.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 80.4% | Coming soon | Coming soon |
| FrontierCode 1.1 Main | 42.7% | Coming soon | Coming soon |
| cursorBench32 | 61.5% | Coming soon | Coming soon |
| VulcanBench CII v1 | 89.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 82.4% | 67.8% | Claude Sonnet 5 |
| SWE-bench (Vals) | 79.6% | 55.2% | Claude Sonnet 5 |
| cursorBench40 | 34.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 35.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Sonnet 5 public-lane score: 78.7 (Unranked · 2 rankable rows)
- Laguna XS.2 public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Not comparable
- Claude Sonnet 5 public-lane score: 78.4 (#15/50)
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 88.3% | Coming soon | Coming soon |
| CharXiv w/o tools | 77% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- Claude Sonnet 5 public-lane score: 64.5 (Supported · #26/168)
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | Claude Sonnet 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| HLE | 57.4% | Coming soon | Coming soon |
| HLE w/o tools | 43.2% | Coming soon | Coming soon |
| HLE-Verified | 31.0% | Coming soon | Coming soon |
| LABBench2 | 80.1% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.9% | 55.1% | Claude Sonnet 5 |
| MMLU-Pro (Vals) | 87.5% | 69.1% | Claude Sonnet 5 |

## FAQ

### Which is better overall, Claude Sonnet 5 or Laguna XS.2?

Claude Sonnet 5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Claude Sonnet 5 and Laguna XS.2?

The widest category gap is in coding, where the averages are 59.8 for Claude Sonnet 5 and 24.3 for Laguna XS.2.

### How many benchmarks does Claude Sonnet 5 cover on BenchLM?

Claude Sonnet 5 currently has 26 sourced benchmark scores on BenchLM.

### How many benchmarks does Laguna XS.2 cover on BenchLM?

Laguna XS.2 currently has 10 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Sonnet 5 vs Laguna S 2.1](/compare/claude-sonnet-5-vs-laguna-s-2-1)
- [Laguna XS.2 vs Laguna S 2.1](/compare/laguna-s-2-1-vs-laguna-xs-2)
- [Claude Sonnet 5 vs Laguna M.1](/compare/claude-sonnet-5-vs-laguna-m-1)
- [Laguna XS.2 vs Laguna M.1](/compare/laguna-m-1-vs-laguna-xs-2)

## Explore More

- [Claude Sonnet 5 profile](/models/claude-sonnet-5)
- [Laguna XS.2 profile](/models/laguna-xs-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)