# Claude Haiku 4.5 vs Gemini 3.5 Flash

> Side-by-side benchmark comparison for Claude Haiku 4.5 and Gemini 3.5 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-4-5-vs-gemini-3-5-flash
- Last updated: October 2, 2026

- Shared sourced benchmarks: 7
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Gemini 3.5 Flash leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Gemini 3.5 Flash has the higher overall point estimate 63.95 to 42.41. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in coding, where the averages are 19.5 for Claude Haiku 4.5 and 52.3 for Gemini 3.5 Flash.
- The biggest single benchmark swing is LiveCodeBench (Vals) in Coding, with scores of 41.2% and 87.6%.
- Claude Haiku 4.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3.5 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Claude Haiku 4.5 | Gemini 3.5 Flash |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 200K | 1M |
| Overall Score | 42.41 | 63.95 |
| Benchmarks Covered | 10 | 27 |
| Pricing (input/output) | $1.00 / $5.00 | $1.50 / $9.00 |

## Category Breakdown

### Agentic

- Winner: Gemini 3.5 Flash
- Claude Haiku 4.5 public-lane score: 21.8 (Supported · #97/119)
- Gemini 3.5 Flash public-lane score: 50.7 (Supported · #42/119)

| Benchmark | Claude Haiku 4.5 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 16.0% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 43.8% | 74.2% | Gemini 3.5 Flash |
| Terminal-Bench 2.1 | Coming soon | 76.2% | Coming soon |
| MCP Atlas | Coming soon | 83.6% | Coming soon |
| Toolathlon | Coming soon | 56.5% | Coming soon |
| OSWorld-Verified | Coming soon | 78.4% | Coming soon |
| Finance Agent v2 | Coming soon | 57.9% | Coming soon |
| Gert Labs | Coming soon | 61.85% | Coming soon |
| ResearchClawBench | Coming soon | 18.0% | Coming soon |

### Coding

- Winner: Gemini 3.5 Flash
- Claude Haiku 4.5 public-lane score: 19.5 (Supported · #120/144)
- Gemini 3.5 Flash public-lane score: 52.3 (Supported · #39/144)

| Benchmark | Claude Haiku 4.5 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 73.3% | Coming soon | Coming soon |
| VulcanBench v3 | 76.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 41.2% | 87.6% | Gemini 3.5 Flash |
| SWE-bench (Vals) | 66.6% | 78.8% | Gemini 3.5 Flash |
| Terminal-Bench 2.1 | Coming soon | 76.2% | Coming soon |
| SWE-bench Pro | Coming soon | 55.1% | Coming soon |
| Vibe Code Bench | Coming soon | 48.68% | Coming soon |
| cursorBench31 | Coming soon | 49.8% | Coming soon |
| CursorBench 3.2 | Coming soon | 48.8% | Coming soon |

### Reasoning

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 62.8 (#20/27)

| Benchmark | Claude Haiku 4.5 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | Coming soon | 77.3% | Coming soon |
| MRCR 1M | Coming soon | 26.6% | Coming soon |
| ARC-AGI-2 | Coming soon | 72.1% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 87.8 (#6/49)

| Benchmark | Claude Haiku 4.5 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | Coming soon | 84.2% | Coming soon |
| MMMU-Pro | Coming soon | 83.6% | Coming soon |
| Blueprint-Bench 2 | Coming soon | 33.6% | Coming soon |

### Knowledge

- Winner: Directional only
- Claude Haiku 4.5 public-lane score: 35.2 (Estimated · #116/171)
- Gemini 3.5 Flash public-lane score: 64 (Supported · #30/171)

| Benchmark | Claude Haiku 4.5 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 72.2% | 92.7% | Gemini 3.5 Flash |
| MMLU-Pro (Vals) | 78.7% | 89.5% | Gemini 3.5 Flash |
| GPQA-D | Coming soon | 92.7% | Coming soon |
| HLE | Coming soon | 40.2% | Coming soon |

### Instruction Following

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: Coming soon
- Gemini 3.5 Flash public-lane score: 84.1 (#43/125)

### Mathematics

- Winner: Not comparable
- Claude Haiku 4.5 public-lane score: 28.8 (Unranked · 2 rankable rows)
- Gemini 3.5 Flash public-lane score: 55.1 (Unranked · 2 rankable rows)

| Benchmark | Claude Haiku 4.5 | Gemini 3.5 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 5.903% | 38.966% | Gemini 3.5 Flash |
| FrontierMath v2 (Tier 4) | 2.083% | 14.583% | Gemini 3.5 Flash |

## FAQ

### Which is better overall, Claude Haiku 4.5 or Gemini 3.5 Flash?

Gemini 3.5 Flash has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Claude Haiku 4.5 and Gemini 3.5 Flash?

The widest category gap is in coding, where the averages are 19.5 for Claude Haiku 4.5 and 52.3 for Gemini 3.5 Flash.

### How many benchmarks does Claude Haiku 4.5 cover on BenchLM?

Claude Haiku 4.5 currently has 10 sourced benchmark scores on BenchLM.

### How many benchmarks does Gemini 3.5 Flash cover on BenchLM?

Gemini 3.5 Flash currently has 27 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Claude Haiku 4.5 vs Claude Haiku 4.5 Thinking](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [Gemini 3.5 Flash vs Claude Haiku 4.5 Thinking](/compare/claude-haiku-4-5-thinking-vs-gemini-3-5-flash)
- [Claude Haiku 4.5 vs Gemini 3.5 Flash Cyber](/compare/claude-haiku-4-5-vs-gemini-3-5-flash-cyber)
- [Gemini 3.5 Flash vs Gemini 3.5 Flash Cyber](/compare/gemini-3-5-flash-vs-gemini-3-5-flash-cyber)

## Explore More

- [Claude Haiku 4.5 profile](/models/claude-haiku-4-5)
- [Gemini 3.5 Flash profile](/models/gemini-3-5-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)