# Claude Haiku 5.5 vs SWE-2 Flash

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

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

- Shared sourced benchmarks: 3
- 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 Flash 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.
- SWE-2 Flash has the lower published output-token price.

## Model Snapshot

| Property | Claude Haiku 5.5 | SWE-2 Flash |
|----------|----------|----------|
| Creator | Anthropic | Cognition |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 66.56 | null |
| Benchmarks Covered | 19 | 7 |
| 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: 61.8 (Supported · #22/135)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 39.20% | 20.00% | Claude Haiku 5.5 |
| HLE w/ tools | 57.4% | Coming soon | Coming soon |
| MazeBench | 1% | Coming soon | Coming soon |
| Hermes Index | 37.0% | Coming soon | Coming soon |
| Hermes Bench | 71.0% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 72.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 89.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 52.3 (Supported · #40/156)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 1.1 Main | 46.4% | 45.5% | Claude Haiku 5.5 |
| Bug Hunt Bench | 21.5 fixes | Coming soon | Coming soon |
| FrontierSWE v2 | 43.8% | Coming soon | Coming soon |
| FrontierCode 2.0 | 27.7% | 24.0% | Claude Haiku 5.5 |
| Terminal-Bench 2.1 | Coming soon | 89.2% | Coming soon |
| DeepSWE | Coming soon | 60.1% | Coming soon |
| SWE-Atlas Codebase QnA | Coming soon | 50.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 59.8 (#22/26)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-1 | 89.00% | Coming soon | Coming soon |
| ARC-AGI-2 | 61.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.5% | Coming soon | Coming soon |
| ARC-AGI-3 Provider Adapter | 2.82% | Coming soon | Coming soon |

### Multimodal & Grounded

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

| Benchmark | Claude Haiku 5.5 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 56.02% | Coming soon | Coming soon |
| Chartography (no tools) | 46.4% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 65.3 (Supported · #30/177)
- SWE-2 Flash public-lane score: Coming soon

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

### Mathematics

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 79.1 (Unranked · 2 rankable rows)
- SWE-2 Flash public-lane score: Coming soon

| Benchmark | Claude Haiku 5.5 | SWE-2 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 75.088% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 46.341% | Coming soon | Coming soon |

## FAQ

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

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

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

## Explore More

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