# Gemini 3.6 Flash vs GPT-5.1

> Side-by-side benchmark comparison for Gemini 3.6 Flash and GPT-5.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-6-flash-vs-gpt-5-1
- Last updated: September 4, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Gemini 3.6 Flash and GPT-5.1.

## Summary

- Gemini 3.6 Flash and GPT-5.1 do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Gemini 3.6 Flash | GPT-5.1 |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 200K |
| Independent public score (not head-to-head) | 70.11 | 63.69 |
| Benchmarks Covered | 8 | 4 |
| Pricing (input/output) | $1.50 / $7.50 | $1.25 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: 50.7 (Supported · #60/151)
- GPT-5.1 public-lane score: 56.3 (Estimated · #36/151)

| Benchmark | Gemini 3.6 Flash | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| OSWorld-Verified | 83% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 73.8% | Coming soon | Coming soon |
| Gert Labs | Coming soon | 41.24% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: 58.9 (Supported · #30/183)
- GPT-5.1 public-lane score: 45.2 (Supported · #109/183)

| Benchmark | Gemini 3.6 Flash | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| deepSwe | 49% | Coming soon | Coming soon |
| cursorBench32 | 53.5% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 88.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 79.6% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 24.61% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: 82.3 (Unranked · 1 rankable row)
- GPT-5.1 public-lane score: 70.9 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: 77.8 (Unranked · 2 rankable rows)
- GPT-5.1 public-lane score: 76.2 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: 68.6 (Supported · #18/181)
- GPT-5.1 public-lane score: 58.8 (Estimated · #43/181)

| Benchmark | Gemini 3.6 Flash | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 93.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 89.3% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: Coming soon
- GPT-5.1 public-lane score: 89.1 (#26/120)

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 3.6 Flash public-lane score: Coming soon
- GPT-5.1 public-lane score: 49.2 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.6 Flash | GPT-5.1 | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 31.034% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 12.500% | Coming soon |

## FAQ

### Can I compare Gemini 3.6 Flash and GPT-5.1 on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Gemini 3.6 Flash vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-6-flash)
- [GPT-5.1 vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gpt-5-1)
- [Gemini 3.6 Flash vs GPT-6 Astra](/compare/gemini-3-6-flash-vs-gpt-6-astra)
- [GPT-5.1 vs GPT-6 Astra](/compare/gpt-5-1-vs-gpt-6-astra)

## Explore More

- [Gemini 3.6 Flash profile](/models/gemini-3-6-flash)
- [GPT-5.1 profile](/models/gpt-5-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)