# Gemini 3.5 Flash-Lite vs GPT-5.4 mini

> Side-by-side benchmark comparison for Gemini 3.5 Flash-Lite and GPT-5.4 mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

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

- Shared sourced benchmarks: 7
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick GPT-5.4 mini 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

- GPT-5.4 mini leads overall 62.63 to 60.5.
- The clearest category separation is in multimodal & grounded, where the averages are 76.3 for Gemini 3.5 Flash-Lite and 57.2 for GPT-5.4 mini.
- The biggest single benchmark swing is Terminal-Bench 2.0 in Agentic, with scores of 54% and 60%.
- Gemini 3.5 Flash-Lite is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3.5 Flash-Lite also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3.5 Flash-Lite | GPT-5.4 mini |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 400K |
| Overall Score | 60.5 | 62.63 |
| Benchmarks Covered | 10 | 19 |
| Pricing (input/output) | $0.30 / $2.50 | $0.75 / $4.50 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Gemini 3.5 Flash-Lite public-lane score: 43.4 (Estimated · #104/151)
- GPT-5.4 mini public-lane score: 42.4 (Estimated · #113/151)

| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 54% | 60% | GPT-5.4 mini |
| OSWorld-Verified | 74% | 72.1% | Gemini 3.5 Flash-Lite |
| Terminal-Bench 2.1 (Vals) | 50.2% | 54.7% | GPT-5.4 mini |
| 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: Gemini 3.5 Flash-Lite
- Gemini 3.5 Flash-Lite public-lane score: 43.6 (Supported · #121/183)
- GPT-5.4 mini public-lane score: 42.9 (Supported · #125/183)

| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 54.0% | Coming soon | Coming soon |
| SWE-bench Pro | 54.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 79.0% | 81.5% | GPT-5.4 mini |
| SWE-bench (Vals) | 75.0% | 73.0% | Gemini 3.5 Flash-Lite |
| Vibe Code Bench | Coming soon | 47.97% | Coming soon |
| FrontierCode 1.1 Main | Coming soon | 27.0% | Coming soon |

### Multimodal & Grounded

- Winner: Coming soon
- Gemini 3.5 Flash-Lite public-lane score: 76.3 (#16/48)
- GPT-5.4 mini public-lane score: 57.2 (#31/48)

| Benchmark | Gemini 3.5 Flash-Lite | 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 3.5 Flash-Lite public-lane score: 60.8 (Unranked · 3 rankable rows)
- GPT-5.4 mini public-lane score: 73.5 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | 72.2% | Coming soon | Coming soon |

### Knowledge

- Winner: GPT-5.4 mini
- Gemini 3.5 Flash-Lite public-lane score: 53.1 (Supported · #71/181)
- GPT-5.4 mini public-lane score: 56.3 (Supported · #53/181)

| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 83.8% | 83.1% | Gemini 3.5 Flash-Lite |
| MMLU-Pro (Vals) | 85.8% | 84.6% | Gemini 3.5 Flash-Lite |
| 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 3.5 Flash-Lite public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 89.6 (#23/120)

### Mathematics

- Winner: Coming soon
- Gemini 3.5 Flash-Lite public-lane score: Coming soon
- GPT-5.4 mini public-lane score: 44.5 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.5 Flash-Lite | GPT-5.4 mini | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | Coming soon | 28.280% | Coming soon |
| FrontierMath v2 (Tier 4) | Coming soon | 2.080% | Coming soon |

## FAQ

### Which is better overall, Gemini 3.5 Flash-Lite or GPT-5.4 mini?

GPT-5.4 mini is ahead overall on BenchLM right now.

### Where is the biggest gap between Gemini 3.5 Flash-Lite and GPT-5.4 mini?

The widest category gap is in multimodal & grounded, where the averages are 76.3 for Gemini 3.5 Flash-Lite and 57.2 for GPT-5.4 mini.

### 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.

### 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 3.5 Flash-Lite vs GPT-5.4](/compare/gemini-3-5-flash-lite-vs-gpt-5-4)
- [GPT-5.4 mini vs GPT-5.4](/compare/gpt-5-4-vs-gpt-5-4-mini)
- [Gemini 3.5 Flash-Lite vs GPT-5.4 nano](/compare/gemini-3-5-flash-lite-vs-gpt-5-4-nano)
- [GPT-5.4 mini vs GPT-5.4 nano](/compare/gpt-5-4-mini-vs-gpt-5-4-nano)

## Explore More

- [Gemini 3.5 Flash-Lite profile](/models/gemini-3-5-flash-lite)
- [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)