# Claude Haiku 4.5 Thinking vs Gemini 3 Pro

> Side-by-side benchmark comparison for Claude Haiku 4.5 Thinking and Gemini 3 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-4-5-thinking-vs-gemini-3-pro
- Last updated: September 4, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Haiku 4.5 Thinking and Gemini 3 Pro share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Gemini 3 Pro has the larger published context window at 2M.

## Model Snapshot

| Property | Claude Haiku 4.5 Thinking | Gemini 3 Pro |
|----------|----------|----------|
| Creator | Anthropic | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 200K | 2M |
| Independent public score (not head-to-head) | null | 67.23 |
| Benchmarks Covered | 1 | 12 |
| Pricing (input/output) | N/A | $2.00 / $12.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 59.7 (Estimated · #30/151)

| Benchmark | Claude Haiku 4.5 Thinking | Gemini 3 Pro | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | Coming soon | 63.23% | Coming soon |
| JobBench | Coming soon | 11.4% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 60.9 (Estimated · #21/183)

| Benchmark | Claude Haiku 4.5 Thinking | Gemini 3 Pro | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 11.39% | 14.30% | Gemini 3 Pro |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 74.2 (#17/48)

| Benchmark | Claude Haiku 4.5 Thinking | Gemini 3 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 81% | Coming soon |
| MathVision | Coming soon | 86.6% | Coming soon |
| VideoMMMU | Coming soon | 87.6% | Coming soon |
| ScreenSpot Pro | Coming soon | 72.7% | Coming soon |
| CharXiv | Coming soon | 81.4% | Coming soon |
| V* | Coming soon | 88.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 36.8 (Unranked · 3 rankable rows)

| Benchmark | Claude Haiku 4.5 Thinking | Gemini 3 Pro | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | Coming soon | 31.1% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 65.3 (Estimated · #25/181)

### Instruction Following

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 85.8 (#38/120)

### Mathematics

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Gemini 3 Pro public-lane score: 55.4 (Unranked · 2 rankable rows)

| Benchmark | Claude Haiku 4.5 Thinking | Gemini 3 Pro | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 37.600% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 18.750% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Haiku 4.5 Thinking and Gemini 3 Pro?

Not yet. The models share only 1 sourced benchmark row, 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 4.5 Thinking vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [Gemini 3 Pro vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-gemini-3-pro)
- [Claude Haiku 4.5 Thinking vs Gemini 3 Pro Deep Think](/compare/claude-haiku-4-5-thinking-vs-gemini-3-pro-deep-think)
- [Gemini 3 Pro vs Gemini 3 Pro Deep Think](/compare/gemini-3-pro-vs-gemini-3-pro-deep-think)

## Explore More

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