# Laguna XS 2.1 vs LongCat-Flash-Lite-Sparse

> Side-by-side benchmark comparison for Laguna XS 2.1 and LongCat-Flash-Lite-Sparse across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/laguna-xs-2-1-vs-longcat-flash-lite-sparse
- Last updated: September 10, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Treat this as a split decision: use the category and benchmark breakdown to decide which profile better matches your workload.

## Summary

- Laguna XS 2.1 and LongCat-Flash-Lite-Sparse are tied on overall score, so the decision depends on category fit rather than the headline number.
- The biggest single benchmark swing is SWE-bench Pro in Coding, with scores of 47.6% and 40.6%.
- LongCat-Flash-Lite-Sparse is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- LongCat-Flash-Lite-Sparse also has the larger context window at 1M.

## Model Snapshot

| Property | Laguna XS 2.1 | LongCat-Flash-Lite-Sparse |
|----------|----------|----------|
| Creator | Poolside | Meituan |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 1M |
| Overall Score | null | null |
| Benchmarks Covered | 5 | 17 |
| Pricing (input/output) | $0.10 / $0.20 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Laguna XS 2.1 public-lane score: Coming soon
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | Laguna XS 2.1 | LongCat-Flash-Lite-Sparse | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 37.5% | 33.7% | Laguna XS 2.1 |
| VITA-Bench | Coming soon | 21.7% | Coming soon |
| MCP Atlas | Coming soon | 45.6% | Coming soon |
| BrowseComp | Coming soon | 48.6% | Coming soon |

### Coding

- Winner: Coming soon
- Laguna XS 2.1 public-lane score: Coming soon
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | Laguna XS 2.1 | LongCat-Flash-Lite-Sparse | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 70.9% | 68.2% | Laguna XS 2.1 |
| SWE Multilingual | 63.1% | 59.3% | Laguna XS 2.1 |
| SWE-bench Pro | 47.6% | 40.6% | Laguna XS 2.1 |
| Terminal-Bench 2.0 | 37.5% | 33.7% | Laguna XS 2.1 |

### Knowledge

- Winner: Coming soon
- Laguna XS 2.1 public-lane score: Coming soon
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | Laguna XS 2.1 | LongCat-Flash-Lite-Sparse | Winner |
|-----------|-----------|-----------|--------|
| MMLU | Coming soon | 85.3% | Coming soon |
| MMLU-Pro | Coming soon | 79.2% | Coming soon |
| CMMLU | Coming soon | 84.3% | Coming soon |
| C-Eval | Coming soon | 85.8% | Coming soon |
| GPQA-D | Coming soon | 69.5% | Coming soon |

### Mathematics

- Winner: Coming soon
- Laguna XS 2.1 public-lane score: Coming soon
- LongCat-Flash-Lite-Sparse public-lane score: Coming soon

| Benchmark | Laguna XS 2.1 | LongCat-Flash-Lite-Sparse | Winner |
|-----------|-----------|-----------|--------|
| MATH-500 | Coming soon | 95.8% | Coming soon |
| AIME26 | Coming soon | 65.7% | Coming soon |
| HMMT Feb 2026 | Coming soon | 40.5% | Coming soon |
| IMOAnswerBench | Coming soon | 49.4% | Coming soon |

## FAQ

### Which is better overall, Laguna XS 2.1 or LongCat-Flash-Lite-Sparse?

Laguna XS 2.1 and LongCat-Flash-Lite-Sparse are tied on overall score in the current BenchLM data.

### How many benchmarks does Laguna XS 2.1 cover on BenchLM?

Laguna XS 2.1 currently has 5 sourced benchmark scores on BenchLM.

### How many benchmarks does LongCat-Flash-Lite-Sparse cover on BenchLM?

LongCat-Flash-Lite-Sparse currently has 17 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Laguna XS 2.1 vs Laguna M.1](/compare/laguna-m-1-vs-laguna-xs-2-1)
- [LongCat-Flash-Lite-Sparse vs Laguna M.1](/compare/laguna-m-1-vs-longcat-flash-lite-sparse)
- [Laguna XS 2.1 vs Laguna XS.2](/compare/laguna-xs-2-vs-laguna-xs-2-1)
- [LongCat-Flash-Lite-Sparse vs Laguna XS.2](/compare/laguna-xs-2-vs-longcat-flash-lite-sparse)

## Explore More

- [Laguna XS 2.1 profile](/models/laguna-xs-2-1)
- [LongCat-Flash-Lite-Sparse profile](/models/longcat-flash-lite-sparse)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)