# Gemini 3.1 Pro vs Gemini 3 Flash

> Side-by-side benchmark comparison for Gemini 3.1 Pro and Gemini 3 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-pro-vs-gemini-3-flash
- Last updated: October 17, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Gemini 3.1 Pro leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Gemini 3.1 Pro has the higher overall point estimate 64.7 to 54.28. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in knowledge, where the averages are 67.6 for Gemini 3.1 Pro and 55.7 for Gemini 3 Flash.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 70.8% and 53.9%.
- Gemini 3 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Gemini 3.1 Pro | Gemini 3 Flash |
|----------|----------|----------|
| Creator | Google | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Non-Reasoning |
| Context | 1M | 1M |
| Overall Score | 64.7 | 54.28 |
| Benchmarks Covered | 30 | 11 |
| Pricing (input/output) | $2.00 / $12.00 | $0.50 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 38.4 (Supported · #70/128)
- Gemini 3 Flash public-lane score: 32.4 (Supported · #88/128)

| Benchmark | Gemini 3.1 Pro | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | 57.8% | 49.2% | Gemini 3.1 Pro |
| DeepSearchQA | 69.7% | Coming soon | Coming soon |
| τ²-bench results | 95.6% | Coming soon | Coming soon |
| Gert Labs | 56.87% | 56.63% | Gemini 3.1 Pro |
| ResearchClawBench | 13.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 70.8% | 53.9% | Gemini 3.1 Pro |
| MazeBench | 1% | Coming soon | Coming soon |
| JobBench | Coming soon | 11.4% | Coming soon |

### Coding

- Winner: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 39.2 (Supported · #67/150)
- Gemini 3 Flash public-lane score: 32.1 (Supported · #88/150)

| Benchmark | Gemini 3.1 Pro | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 82.9% | Coming soon | Coming soon |
| React Native Evals | 78.9% | Coming soon | Coming soon |
| Vibe Code Bench | 32.03% | 20.20% | Gemini 3.1 Pro |
| LiveCodeBench (Vals) | 88.5% | 85.6% | Gemini 3.1 Pro |
| SWE-bench (Vals) | 78.8% | 75.0% | Gemini 3.1 Pro |
| PostTrainBench v1.1 | 22.0% | Coming soon | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 58.2 (Unranked · 2 rankable rows)
- Gemini 3 Flash public-lane score: 63.8 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.1 Pro | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 77.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 80.1 (#17/54)
- Gemini 3 Flash public-lane score: 80.3 (Unranked · 1 rankable row)

| Benchmark | Gemini 3.1 Pro | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 83.9% | Coming soon | Coming soon |
| CharXiv | 80.2% | Coming soon | Coming soon |
| ERQA | 69.4% | Coming soon | Coming soon |
| SimpleVQA | 72.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 84.4% | Coming soon | Coming soon |
| ZeroBench | 29.0% | Coming soon | Coming soon |
| MedXpertQA (MM) | 81.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 67.6 (Supported · #26/184)
- Gemini 3 Flash public-lane score: 55.7 (Supported · #55/184)

| Benchmark | Gemini 3.1 Pro | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 94.3% | Coming soon | Coming soon |
| HLE w/o tools | 45.4% | Coming soon | Coming soon |
| HealthBench Hard | 20.6% | Coming soon | Coming soon |
| MedXpertQA (Text) | 71.5% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 95.5% | 87.9% | Gemini 3.1 Pro |
| MMLU-Pro (Vals) | 91.0% | 88.6% | Gemini 3.1 Pro |

### Instruction Following

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: Coming soon
- Gemini 3 Flash public-lane score: 66.1 (#76/148)

### Mathematics

- Winner: Not comparable
- Gemini 3.1 Pro public-lane score: 65 (Unranked · 2 rankable rows)
- Gemini 3 Flash public-lane score: 57.4 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.1 Pro | Gemini 3 Flash | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 59.649% | 51.228% | Gemini 3.1 Pro |
| FrontierMath v2 (Tier 4) | 26.829% | 17.073% | Gemini 3.1 Pro |

## FAQ

### Which is better overall, Gemini 3.1 Pro or Gemini 3 Flash?

Gemini 3.1 Pro has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Gemini 3.1 Pro and Gemini 3 Flash?

The widest category gap is in knowledge, where the averages are 67.6 for Gemini 3.1 Pro and 55.7 for Gemini 3 Flash.

### How many benchmarks does Gemini 3.1 Pro cover on BenchLM?

Gemini 3.1 Pro currently has 30 sourced benchmark scores on BenchLM.

### How many benchmarks does Gemini 3 Flash cover on BenchLM?

Gemini 3 Flash currently has 11 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.1 Pro vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-1-pro)
- [Gemini 3 Flash vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-flash)
- [Gemini 3.1 Pro vs GPT-6.1 Sol](/compare/gemini-3-1-pro-vs-gpt-6-1-sol)
- [Gemini 3 Flash vs GPT-6.1 Sol](/compare/gemini-3-flash-vs-gpt-6-1-sol)

## Explore More

- [Gemini 3.1 Pro profile](/models/gemini-3-1-pro)
- [Gemini 3 Flash profile](/models/gemini-3-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)