# Gemini 3.1 Pro vs Gemini 3.5 Flash-Lite

> Side-by-side benchmark comparison for Gemini 3.1 Pro and Gemini 3.5 Flash-Lite across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-pro-vs-gemini-3-5-flash-lite
- Last updated: September 4, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Gemini 3.1 Pro if you want the stronger benchmark profile. Gemini 3.5 Flash-Lite only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemini 3.1 Pro leads overall 69.82 to 60.5.
- The clearest category separation is in knowledge, where the averages are 65.4 for Gemini 3.1 Pro and 53 for Gemini 3.5 Flash-Lite.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 70.8% and 50.2%.
- Gemini 3.5 Flash-Lite 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 3.5 Flash-Lite |
|----------|----------|----------|
| Creator | Google | Google |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Overall Score | 69.82 | 60.5 |
| Benchmarks Covered | 28 | 10 |
| Pricing (input/output) | $2.00 / $12.00 | $0.30 / $2.50 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 40.1 (Supported · #120/151)
- Gemini 3.5 Flash-Lite public-lane score: 43.4 (Estimated · #104/151)

| Benchmark | Gemini 3.1 Pro | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | 57.8% | Coming soon | Coming soon |
| DeepSearchQA | 69.7% | Coming soon | Coming soon |
| τ²-bench results | 95.6% | Coming soon | Coming soon |
| Gert Labs | 56.87% | Coming soon | Coming soon |
| ResearchClawBench | 13.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 70.8% | 50.2% | Gemini 3.1 Pro |
| Terminal-Bench 2.0 | Coming soon | 54% | Coming soon |
| OSWorld-Verified | Coming soon | 74% | Coming soon |

### Coding

- Winner: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 46.2 (Supported · #99/183)
- Gemini 3.5 Flash-Lite public-lane score: 43.6 (Supported · #121/183)

| Benchmark | Gemini 3.1 Pro | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 82.9% | Coming soon | Coming soon |
| React Native Evals | 78.9% | Coming soon | Coming soon |
| Vibe Code Bench | 32.03% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 88.5% | 79.0% | Gemini 3.1 Pro |
| SWE-bench (Vals) | 78.8% | 75.0% | Gemini 3.1 Pro |
| Terminal-Bench 2.0 | Coming soon | 54.0% | Coming soon |
| SWE-bench Pro | Coming soon | 54.2% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 79.2 (#12/48)
- Gemini 3.5 Flash-Lite public-lane score: 76.1 (#16/48)

| Benchmark | Gemini 3.1 Pro | Gemini 3.5 Flash-Lite | 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 |

### Reasoning

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 50.7 (Unranked · 2 rankable rows)
- Gemini 3.5 Flash-Lite public-lane score: 60.8 (Unranked · 3 rankable rows)

| Benchmark | Gemini 3.1 Pro | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 77.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |
| MRCRv2 | Coming soon | 72.2% | Coming soon |

### Knowledge

- Winner: Gemini 3.1 Pro
- Gemini 3.1 Pro public-lane score: 65.4 (Supported · #24/181)
- Gemini 3.5 Flash-Lite public-lane score: 53 (Supported · #71/181)

| Benchmark | Gemini 3.1 Pro | Gemini 3.5 Flash-Lite | 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% | 83.8% | Gemini 3.1 Pro |
| MMLU-Pro (Vals) | 91.0% | 85.8% | Gemini 3.1 Pro |

### Mathematics

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 54.3 (Unranked · 2 rankable rows)
- Gemini 3.5 Flash-Lite public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Gemini 3.5 Flash-Lite | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 36.900% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 16.700% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Gemini 3.1 Pro or Gemini 3.5 Flash-Lite?

Gemini 3.1 Pro is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3.1 Pro and Gemini 3.5 Flash-Lite?

The widest category gap is in knowledge, where the averages are 65.4 for Gemini 3.1 Pro and 53 for Gemini 3.5 Flash-Lite.

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

Gemini 3.1 Pro currently has 28 sourced benchmark scores on BenchLM.

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

Gemini 3.5 Flash-Lite currently has 10 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.1 Pro vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-1-pro)
- [Gemini 3.5 Flash-Lite vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-5-flash-lite)
- [Gemini 3.1 Pro vs GPT-6 Astra](/compare/gemini-3-1-pro-vs-gpt-6-astra)
- [Gemini 3.5 Flash-Lite vs GPT-6 Astra](/compare/gemini-3-5-flash-lite-vs-gpt-6-astra)

## Explore More

- [Gemini 3.1 Pro profile](/models/gemini-3-1-pro)
- [Gemini 3.5 Flash-Lite profile](/models/gemini-3-5-flash-lite)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)