# Gemini 3.1 Pro vs Seed 2.1 Pro

> Side-by-side benchmark comparison for Gemini 3.1 Pro and Seed 2.1 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-pro-vs-seed-2-1-pro
- Last updated: September 10, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Gemini 3.1 Pro if you want the stronger benchmark profile. Seed 2.1 Pro 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 69.95 to 0.
- The biggest single benchmark swing is ZeroBench in Multimodal & Grounded, with scores of 29.0% and 18.0%.
- Seed 2.1 Pro is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3.1 Pro also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3.1 Pro | Seed 2.1 Pro |
|----------|----------|----------|
| Creator | Google | ByteDance |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 256K |
| Overall Score | 69.95 | null |
| Benchmarks Covered | 28 | 11 |
| Pricing (input/output) | $2.00 / $12.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 38.9 (Supported · #121/152)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Seed 2.1 Pro | 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% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |

### Coding

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 46.3 (Supported · #82/151)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Seed 2.1 Pro | 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% | Coming soon | Coming soon |
| SWE-bench (Vals) | 78.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |
| NL2Repo | Coming soon | 47% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 79.2 (#12/48)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 83.9% | 81.6% | Gemini 3.1 Pro |
| CharXiv | 80.2% | 85.4% | Seed 2.1 Pro |
| ERQA | 69.4% | 72.0% | Seed 2.1 Pro |
| SimpleVQA | 72.4% | Coming soon | Coming soon |
| ScreenSpot Pro | 84.4% | Coming soon | Coming soon |
| ZeroBench | 29.0% | 18.0% | Gemini 3.1 Pro |
| MedXpertQA (MM) | 81.3% | Coming soon | Coming soon |
| MathVision | Coming soon | 92.6% | Coming soon |
| BabyVision | Coming soon | 73.7% | Coming soon |
| Video-MME | Coming soon | 89.2% | Coming soon |

### Reasoning

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 50.6 (Unranked · 2 rankable rows)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 77.1% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.4% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 66.1 (Supported · #21/183)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Seed 2.1 Pro | 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% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 91.0% | Coming soon | Coming soon |
| SuperGPQA | Coming soon | 70.8% | Coming soon |

### Mathematics

- Winner: Coming soon
- Gemini 3.1 Pro public-lane score: 54.3 (Unranked · 2 rankable rows)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Gemini 3.1 Pro | Seed 2.1 Pro | 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 Seed 2.1 Pro?

Gemini 3.1 Pro is ahead overall on BenchLM right now.

### 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 Seed 2.1 Pro cover on BenchLM?

Seed 2.1 Pro currently has 11 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.1 Pro vs Seed 2.1 Turbo](/compare/gemini-3-1-pro-vs-seed-2-1-turbo)
- [Seed 2.1 Pro vs Seed 2.1 Turbo](/compare/seed-2-1-pro-vs-seed-2-1-turbo)
- [Gemini 3.1 Pro vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-1-pro)
- [Seed 2.1 Pro vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-seed-2-1-pro)

## Explore More

- [Gemini 3.1 Pro profile](/models/gemini-3-1-pro)
- [Seed 2.1 Pro profile](/models/seed-2-1-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)