# Composer 2.5 vs Laguna S 2.1

> Side-by-side benchmark comparison for Composer 2.5 and Laguna S 2.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/composer-2-5-vs-laguna-s-2-1
- Last updated: September 4, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Composer 2.5 and Laguna S 2.1 share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Laguna S 2.1 has the lower published output-token price.
- Laguna S 2.1 has the larger published context window at 1M.

## Model Snapshot

| Property | Composer 2.5 | Laguna S 2.1 |
|----------|----------|----------|
| Creator | Cursor | Poolside |
| Type | Proprietary | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 1M |
| Independent public score (not head-to-head) | null | null |
| Benchmarks Covered | 5 | 6 |
| Pricing (input/output) | $0.50 / $2.50 | $0.10 / $0.20 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: 52 (Estimated · #52/151)
- Laguna S 2.1 public-lane score: 48.2 (Estimated · #77/151)

| Benchmark | Composer 2.5 | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | 70.2% | Laguna S 2.1 |
| Toolathlon-Verified | Coming soon | 49.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Composer 2.5 public-lane score: 51.6 (Supported · #63/183)
- Laguna S 2.1 public-lane score: 47.8 (Estimated · #87/183)

| Benchmark | Composer 2.5 | Laguna S 2.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 69.3% | 70.2% | Laguna S 2.1 |
| SWE Multilingual | 79.8% | 78.5% | Composer 2.5 |
| cursorBench31 | 63.2% | Coming soon | Coming soon |
| cursorBench32 | 56.1% | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 59.4% | Coming soon |
| deepSwe | Coming soon | 40.4% | Coming soon |

## FAQ

### Is there enough evidence to pick between Composer 2.5 and Laguna S 2.1?

Not yet. The models share only 3 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [Composer 2.5 vs Composer 2](/compare/composer-2-vs-composer-2-5)
- [Laguna S 2.1 vs Composer 2](/compare/composer-2-vs-laguna-s-2-1)
- [Composer 2.5 vs Composer 2 Fast](/compare/composer-2-5-vs-composer-2-fast)
- [Laguna S 2.1 vs Composer 2 Fast](/compare/composer-2-fast-vs-laguna-s-2-1)

## Explore More

- [Composer 2.5 profile](/models/composer-2-5)
- [Laguna S 2.1 profile](/models/laguna-s-2-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)