# Claude Haiku 5.5 vs Claude Sonnet 5

> Side-by-side benchmark comparison for Claude Haiku 5.5 and Claude Sonnet 5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-5-5-vs-claude-sonnet-5
- Last updated: October 7, 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 Claude Sonnet 5 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.
- Claude Haiku 5.5 has the lower published output-token price.

## Model Snapshot

| Property | Claude Haiku 5.5 | Claude Sonnet 5 |
|----------|----------|----------|
| Creator | Anthropic | Anthropic |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 66.32 | 65.89 |
| Benchmarks Covered | 5 | 26 |
| Pricing (input/output) | $0.10 / $0.50 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 62.1 (Supported · #18/122)
- Claude Sonnet 5 public-lane score: 64.8 (Supported · #16/122)

| Benchmark | Claude Haiku 5.5 | Claude Sonnet 5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 39.20% | Coming soon | Coming soon |
| HLE w/ tools | 57.4% | 57.4% | Tie |
| Terminal-Bench 3.0 | Coming soon | 14.6% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.4% | Coming soon |
| BrowseComp | Coming soon | 84.7% | Coming soon |
| OSWorld-Verified | Coming soon | 81.2% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 74.5% | Coming soon |
| ApprenticeBench | Coming soon | 16% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 60.9 (Supported · #20/146)
- Claude Sonnet 5 public-lane score: 59 (Supported · #24/146)

| Benchmark | Claude Haiku 5.5 | Claude Sonnet 5 | Winner |
|-----------|-----------|-----------|--------|
| FrontierCode 1.1 Main | 46.4% | 42.7% | Claude Haiku 5.5 |
| SWE-bench Verified | Coming soon | 85.2% | Coming soon |
| SWE-bench Pro | Coming soon | 63.2% | Coming soon |
| SWE Multilingual | Coming soon | 78.3% | Coming soon |
| SWE Multimodal | Coming soon | 28.1% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 80.4% | Coming soon |
| CursorBench 3.2 | Coming soon | 61.5% | Coming soon |
| VulcanBench CII v1 | Coming soon | 89.2% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 82.4% | Coming soon |
| SWE-bench (Vals) | Coming soon | 79.6% | Coming soon |
| CursorBench 4.0 | Coming soon | 34.1% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: 79.2 (Unranked · 2 rankable rows)
- Claude Sonnet 5 public-lane score: 78.7 (Unranked · 2 rankable rows)

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: Coming soon
- Claude Sonnet 5 public-lane score: 78.4 (#15/49)

| Benchmark | Claude Haiku 5.5 | Claude Sonnet 5 | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 46.4% | Coming soon | Coming soon |
| CharXiv | Coming soon | 88.3% | Coming soon |
| CharXiv w/o tools | Coming soon | 77% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 5.5 public-lane score: Coming soon
- Claude Sonnet 5 public-lane score: 64 (Supported · #29/174)

| Benchmark | Claude Haiku 5.5 | Claude Sonnet 5 | Winner |
|-----------|-----------|-----------|--------|
| HLE w/o tools | 45.9% | 43.2% | Claude Haiku 5.5 |
| HLE | Coming soon | 57.4% | Coming soon |
| HLE-Verified | Coming soon | 31.0% | Coming soon |
| LABBench2 | Coming soon | 80.1% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 88.9% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 87.5% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Haiku 5.5 and Claude Sonnet 5?

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 Claude Opus 5.5](/compare/claude-haiku-5-5-vs-claude-opus-5-5)
- [Claude Sonnet 5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-claude-sonnet-5)
- [Claude Haiku 5.5 vs GPT-6 Astra](/compare/claude-haiku-5-5-vs-gpt-6-astra)
- [Claude Sonnet 5 vs GPT-6 Astra](/compare/claude-sonnet-5-vs-gpt-6-astra)

## Explore More

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