# Claude Mythos 5 vs Laguna XS.2

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

- Canonical page: https://benchlm.ai/compare/claude-mythos-5-vs-laguna-xs-2
- Last updated: September 4, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Claude Mythos 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 Mythos 5 leads overall 85 to 1.9.
- The biggest single benchmark swing is Terminal-Bench 2.0 in Agentic, with scores of 88% and 35.7%.
- Laguna XS.2 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Claude Mythos 5 also has the larger context window at 1M+.

## Model Snapshot

| Property | Claude Mythos 5 | Laguna XS.2 |
|----------|----------|----------|
| Creator | Anthropic | Poolside |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M+ | 256K |
| Overall Score | null | 1.9 |
| Benchmarks Covered | 15 | 10 |
| Pricing (input/output) | $10.00 / $50.00 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Claude Mythos 5 public-lane score: Coming soon
- Laguna XS.2 public-lane score: 23.9 (Estimated · #148/151)

| Benchmark | Claude Mythos 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 88% | 35.7% | Claude Mythos 5 |
| OSWorld-Verified | 85% | Coming soon | Coming soon |
| BrowseComp | 88% | Coming soon | Coming soon |
| CyberGym | 83.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 25.8% | Coming soon |

### Coding

- Winner: Coming soon
- Claude Mythos 5 public-lane score: Coming soon
- Laguna XS.2 public-lane score: 25.2 (Supported · #178/183)

| Benchmark | Claude Mythos 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 95.5% | 69.9% | Claude Mythos 5 |
| SWE-bench Pro | 80.3% | 46.3% | Claude Mythos 5 |
| Terminal-Bench 2.0 | 88.0% | 35.7% | Claude Mythos 5 |
| SWE Multilingual | Coming soon | 57.7% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 67.8% | Coming soon |
| SWE-bench (Vals) | Coming soon | 55.2% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Claude Mythos 5 public-lane score: 85.1 (Unranked · 3 rankable rows)
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Multimodal | 54.9% | Coming soon | Coming soon |
| CharXiv | 93.5% | Coming soon | Coming soon |
| CharXiv w/o tools | 88.9% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Claude Mythos 5 public-lane score: Coming soon
- Laguna XS.2 public-lane score: 18.8 (Estimated · #181/181)

| Benchmark | Claude Mythos 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 94.1% | Coming soon | Coming soon |
| HLE | 64.5% | Coming soon | Coming soon |
| HLE w/o tools | 59% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 55.1% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 69.1% | Coming soon |

### Multilingual

- Winner: Coming soon
- Claude Mythos 5 public-lane score: Coming soon
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| SWE Multilingual | 92.2% | Coming soon | Coming soon |

### Mathematics

- Winner: Coming soon
- Claude Mythos 5 public-lane score: Coming soon
- Laguna XS.2 public-lane score: Coming soon

| Benchmark | Claude Mythos 5 | Laguna XS.2 | Winner |
|-----------|-----------|-----------|--------|
| USAMO 2026 | 97.6% | Coming soon | Coming soon |

## FAQ

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

Claude Mythos 5 is ahead overall on BenchLM right now.

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

Claude Mythos 5 currently has 15 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 Mythos 5 vs Claude Mythos 5.1](/compare/claude-mythos-5-vs-claude-mythos-5-1)
- [Laguna XS.2 vs Claude Mythos 5.1](/compare/claude-mythos-5-1-vs-laguna-xs-2)
- [Claude Mythos 5 vs Claude Mythos Preview](/compare/claude-mythos-5-vs-claude-mythos-preview)
- [Laguna XS.2 vs Claude Mythos Preview](/compare/claude-mythos-preview-vs-laguna-xs-2)

## Explore More

- [Claude Mythos 5 profile](/models/claude-mythos-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)