# Gemini 3 Flash vs GPT-5.4 mini

> Side-by-side benchmark comparison for Gemini 3 Flash and GPT-5.4 mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-flash-vs-gpt-5-4-mini
- Last updated: September 10, 2026

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

## Quick Verdict

Pick Gemini 3 Flash if you want the stronger benchmark profile. GPT-5.4 mini only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Gemini 3 Flash leads overall 62.2 to 61.11.
- The clearest category separation is in instruction following, where the averages are 66.2 for Gemini 3 Flash and 89.8 for GPT-5.4 mini.
- The biggest single benchmark swing is Vibe Code Bench in Coding, with scores of 20.20% and 47.97%.
- Gemini 3 Flash is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3 Flash also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3 Flash | GPT-5.4 mini |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 62.2 | 61.11 |
| Benchmarks Covered | 11 | 19 |
| Pricing (input/output) | $0.50 / $3.00 | $0.75 / $4.50 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemini 3 Flash public-lane score: 34 (Supported · #134/152)
- GPT-5.4 mini public-lane score: 39.1 (Estimated · #119/152)

| Benchmark | Gemini 3 Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Claw-Eval | 49.2% | Coming soon | Coming soon |
| Gert Labs | 56.63% | Coming soon | Coming soon |
| JobBench | 11.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 53.9% | 54.7% | GPT-5.4 mini |
| Terminal-Bench 2.0 | Coming soon | 60% | Coming soon |
| OSWorld-Verified | Coming soon | 72.1% | Coming soon |
| MCP Atlas | Coming soon | 57.7% | Coming soon |
| Toolathlon | Coming soon | 42.9% | Coming soon |
| τ²-bench results | Coming soon | 93.4% | Coming soon |

### Coding

- Winner: GPT-5.4 mini
- Gemini 3 Flash public-lane score: 41.5 (Supported · #108/151)
- GPT-5.4 mini public-lane score: 42.7 (Supported · #104/151)

| Benchmark | Gemini 3 Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 20.20% | 47.97% | GPT-5.4 mini |
| LiveCodeBench (Vals) | 85.6% | 81.5% | Gemini 3 Flash |
| SWE-bench (Vals) | 75.0% | 73.0% | Gemini 3 Flash |
| FrontierCode 1.1 Main | Coming soon | 27.0% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Gemini 3 Flash public-lane score: 75.8 (Unranked · 1 rankable row)
- GPT-5.4 mini public-lane score: 57.2 (#31/48)

| Benchmark | Gemini 3 Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 76.6% | Coming soon |
| MMMU-Pro w/ Python | Coming soon | 78% | Coming soon |

### Reasoning

- Winner: Coming soon
- Gemini 3 Flash public-lane score: 59 (Unranked · 2 rankable rows)
- GPT-5.4 mini public-lane score: 73.9 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Gemini 3 Flash
- Gemini 3 Flash public-lane score: 56.9 (Supported · #45/183)
- GPT-5.4 mini public-lane score: 55.6 (Supported · #52/183)

| Benchmark | Gemini 3 Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 87.9% | 83.1% | Gemini 3 Flash |
| MMLU-Pro (Vals) | 88.6% | 84.6% | Gemini 3 Flash |
| GPQA | Coming soon | 88% | Coming soon |
| HLE | Coming soon | 41.5% | Coming soon |
| HLE w/o tools | Coming soon | 28.2% | Coming soon |

### Instruction Following

- Winner: Coming soon
- Gemini 3 Flash public-lane score: 66.2 (#68/123)
- GPT-5.4 mini public-lane score: 89.8 (#23/123)

### Mathematics

- Winner: Coming soon
- Gemini 3 Flash public-lane score: 50.2 (Unranked · 2 rankable rows)
- GPT-5.4 mini public-lane score: 44.5 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3 Flash | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 35.640% | 28.280% | Gemini 3 Flash |
| FrontierMath v2 (Tier 4) | 4.167% | 2.080% | Gemini 3 Flash |

## FAQ

### Which is better overall, Gemini 3 Flash or GPT-5.4 mini?

Gemini 3 Flash is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3 Flash and GPT-5.4 mini?

The widest category gap is in instruction following, where the averages are 66.2 for Gemini 3 Flash and 89.8 for GPT-5.4 mini.

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

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

### How many benchmarks does GPT-5.4 mini cover on BenchLM?

GPT-5.4 mini currently has 19 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3 Flash vs GPT-5.4](/compare/gemini-3-flash-vs-gpt-5-4)
- [GPT-5.4 mini vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Gemini 3 Flash vs GPT-5.4 Pro](/compare/gemini-3-flash-vs-gpt-5-4-pro)
- [GPT-5.4 mini vs GPT-5.4 Pro](/compare/gpt-5-4-mini-vs-gpt-5-4-pro)

## Explore More

- [Gemini 3 Flash profile](/models/gemini-3-flash)
- [GPT-5.4 mini profile](/models/gpt-5-4-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)