# Gemini 3.5 Flash-Lite vs Grok 4.1 Fast (Reasoning)

> Side-by-side benchmark comparison for Gemini 3.5 Flash-Lite and Grok 4.1 Fast (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-5-flash-lite-vs-grok-4-1-fast-reasoning
- 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 3.5 Flash-Lite and Grok 4.1 Fast (Reasoning).

## Summary

- Gemini 3.5 Flash-Lite and Grok 4.1 Fast (Reasoning) 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 3.5 Flash-Lite | Grok 4.1 Fast (Reasoning) |
|----------|----------|----------|
| Creator | Google | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 2M |
| Independent public score (not head-to-head) | 60.5 | 58.18 |
| Benchmarks Covered | 10 | 1 |
| Pricing (input/output) | $0.30 / $2.50 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash-Lite public-lane score: 43.4 (Estimated · #104/151)
- Grok 4.1 Fast (Reasoning) public-lane score: Coming soon

| Benchmark | Gemini 3.5 Flash-Lite | Grok 4.1 Fast (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 54% | Coming soon | Coming soon |
| OSWorld-Verified | 74% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 50.2% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash-Lite public-lane score: 43.6 (Supported · #121/183)
- Grok 4.1 Fast (Reasoning) public-lane score: 48.7 (Estimated · #85/183)

| Benchmark | Gemini 3.5 Flash-Lite | Grok 4.1 Fast (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 54.0% | Coming soon | Coming soon |
| SWE-bench Pro | 54.2% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 79.0% | Coming soon | Coming soon |
| SWE-bench (Vals) | 75.0% | Coming soon | Coming soon |
| Vibe Code Bench | Coming soon | 1.20% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash-Lite public-lane score: 76.1 (#16/48)
- Grok 4.1 Fast (Reasoning) public-lane score: 53 (Unranked · 1 rankable row)

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash-Lite public-lane score: 60.8 (Unranked · 3 rankable rows)
- Grok 4.1 Fast (Reasoning) public-lane score: 71.6 (Unranked · 2 rankable rows)

| Benchmark | Gemini 3.5 Flash-Lite | Grok 4.1 Fast (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | 72.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash-Lite public-lane score: 53 (Supported · #71/181)
- Grok 4.1 Fast (Reasoning) public-lane score: 51.6 (Estimated · #80/181)

| Benchmark | Gemini 3.5 Flash-Lite | Grok 4.1 Fast (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 83.8% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 85.8% | Coming soon | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 3.5 Flash-Lite public-lane score: Coming soon
- Grok 4.1 Fast (Reasoning) public-lane score: 62.8 (#69/120)

## FAQ

### Can I compare Gemini 3.5 Flash-Lite and Grok 4.1 Fast (Reasoning) 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 3.5 Flash-Lite vs Grok 4.1 Fast](/compare/gemini-3-5-flash-lite-vs-grok-4-1-fast)
- [Grok 4.1 Fast (Reasoning) vs Grok 4.1 Fast](/compare/grok-4-1-fast-vs-grok-4-1-fast-reasoning)
- [Gemini 3.5 Flash-Lite vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-gemini-3-5-flash-lite)
- [Grok 4.1 Fast (Reasoning) vs Claude Fable 5.1](/compare/claude-fable-5-1-vs-grok-4-1-fast-reasoning)

## Explore More

- [Gemini 3.5 Flash-Lite profile](/models/gemini-3-5-flash-lite)
- [Grok 4.1 Fast (Reasoning) profile](/models/grok-4-1-fast-reasoning)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)