# Claude Haiku 5.5 vs SWE-2

> Side-by-side benchmark comparison for Claude Haiku 5.5 and SWE-2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-5-5-vs-swe-2
- Last updated: October 7, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Haiku 5.5 and SWE-2 share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- SWE-2 has the lower published output-token price.

## Model Snapshot

| Property | Claude Haiku 5.5 | SWE-2 |
|----------|----------|----------|
| Creator | Anthropic | Cognition |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 66.32 | null |
| Benchmarks Covered | 5 | 5 |
| Pricing (input/output) | $0.10 / $0.50 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 62.1 (Supported · #18/122)
- SWE-2 public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 39.20% | 27.30% | Claude Haiku 5.5 |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 92.8% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 60.9 (Supported · #20/146)
- SWE-2 public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 1.1 Main | 46.4% | 50.0% | SWE-2 |
| Terminal-Bench 2.1 | Coming soon | 92.8% | Coming soon |
| DeepSWE | Coming soon | 73.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 79.2 (Unranked · 2 rankable rows)
- SWE-2 public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: Coming soon
- SWE-2 public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 46.4% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: Coming soon
- SWE-2 public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 | Winner |
|-----------|-----------|-----------|--------|
| HLE w/o tools | 45.9% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Haiku 5.5 and SWE-2?

Not yet. The models share only 2 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

- [Claude Haiku 5.5 vs SWE-1.7](/compare/claude-haiku-5-5-vs-swe-1-7)
- [SWE-2 vs SWE-1.7](/compare/swe-1-7-vs-swe-2)
- [Claude Haiku 5.5 vs Claude Opus 5.5](/compare/claude-haiku-5-5-vs-claude-opus-5-5)
- [SWE-2 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-swe-2)

## Explore More

- [Claude Haiku 5.5 profile](/models/claude-haiku-5-5)
- [SWE-2 profile](/models/swe-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)