# Gemini 3.1 Flash-Lite vs Grok 4.5

> Side-by-side benchmark comparison for Gemini 3.1 Flash-Lite and Grok 4.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-flash-lite-vs-grok-4-5
- Last updated: October 7, 2026

- Shared sourced benchmarks: 5
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Grok 4.5 leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Grok 4.5 has the higher overall point estimate 63.97 to 48.15. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in multimodal & grounded, where the averages are 38.5 for Gemini 3.1 Flash-Lite and 79.5 for Grok 4.5.
- The biggest single benchmark swing is Terminal-Bench 2.1 (Vals) in Agentic, with scores of 34.1% and 67.8%.
- Gemini 3.1 Flash-Lite is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Gemini 3.1 Flash-Lite also has the larger context window at 1M.

## Model Snapshot

| Property | Gemini 3.1 Flash-Lite | Grok 4.5 |
|----------|----------|----------|
| Creator | Google | xAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 500K |
| Overall Score | 48.15 | 63.97 |
| Benchmarks Covered | 10 | 17 |
| Pricing (input/output) | $0.25 / $1.50 | $2.00 / $6.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Gemini 3.1 Flash-Lite public-lane score: 28.6 (Estimated · #88/122)
- Grok 4.5 public-lane score: 57.6 (Supported · #29/122)

| Benchmark | Gemini 3.1 Flash-Lite | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 38.46% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 34.1% | 67.8% | Grok 4.5 |
| Terminal-Bench 3.0 | Coming soon | 15.7% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.3% | Coming soon |
| deepSwe | Coming soon | 53% | Coming soon |

### Coding

- Winner: Directional only
- Gemini 3.1 Flash-Lite public-lane score: 26.2 (Estimated · #102/146)
- Grok 4.5 public-lane score: 57.7 (Supported · #27/146)

| Benchmark | Gemini 3.1 Flash-Lite | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 0.00% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 80.1% | 87.4% | Grok 4.5 |
| SWE-bench (Vals) | 62.8% | 86.6% | Grok 4.5 |
| SWE-bench Pro | Coming soon | 64.7% | Coming soon |
| SWE Multilingual | Coming soon | 78% | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 83.3% | Coming soon |
| CursorBench 3.2 | Coming soon | 66.7% | Coming soon |
| VulcanBench v3 | Coming soon | 89.9% | Coming soon |
| PostTrainBench v1.1 | Coming soon | 23.4% | Coming soon |

### Reasoning

- Winner: Not comparable
- Gemini 3.1 Flash-Lite public-lane score: Coming soon
- Grok 4.5 public-lane score: 50.4 (#28/28)

| Benchmark | Gemini 3.1 Flash-Lite | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | 14.26 | Coming soon | Coming soon |
| JevBench 1.5 | 19.58 | Coming soon | Coming soon |
| ARC-AGI-2 | Coming soon | 52.6% | Coming soon |
| ARC-AGI-3 | Coming soon | 0.3% | Coming soon |
| ARC-AGI-1 | Coming soon | 85.67% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Gemini 3.1 Flash-Lite public-lane score: 38.5 (Unranked · 1 rankable row)
- Grok 4.5 public-lane score: 79.5 (Unranked · 1 rankable row)

| Benchmark | Gemini 3.1 Flash-Lite | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| CharXiv | 73.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Directional only
- Gemini 3.1 Flash-Lite public-lane score: 47.5 (Estimated · #81/174)
- Grok 4.5 public-lane score: 67 (Supported · #19/174)

| Benchmark | Gemini 3.1 Flash-Lite | Grok 4.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 81.1% | 92.9% | Grok 4.5 |
| MMLU-Pro (Vals) | 86.2% | 89.2% | Grok 4.5 |

## FAQ

### Which is better overall, Gemini 3.1 Flash-Lite or Grok 4.5?

Grok 4.5 has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Gemini 3.1 Flash-Lite and Grok 4.5?

The widest category gap is in multimodal & grounded, where the averages are 38.5 for Gemini 3.1 Flash-Lite and 79.5 for Grok 4.5.

### How many benchmarks does Gemini 3.1 Flash-Lite cover on BenchLM?

Gemini 3.1 Flash-Lite currently has 10 sourced benchmark scores on BenchLM.

### How many benchmarks does Grok 4.5 cover on BenchLM?

Grok 4.5 currently has 17 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Gemini 3.1 Flash-Lite vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-gemini-3-1-flash-lite)
- [Grok 4.5 vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-grok-4-5)
- [Gemini 3.1 Flash-Lite vs GPT-6 Astra](/compare/gemini-3-1-flash-lite-vs-gpt-6-astra)
- [Grok 4.5 vs GPT-6 Astra](/compare/gpt-6-astra-vs-grok-4-5)

## Explore More

- [Gemini 3.1 Flash-Lite profile](/models/gemini-3-1-flash-lite)
- [Grok 4.5 profile](/models/grok-4-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)