# Gemini 3.1 Flash-Lite vs GPT-6 Luna (Decisions)

> Side-by-side benchmark comparison for Gemini 3.1 Flash-Lite and GPT-6 Luna (Decisions) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-3-1-flash-lite-vs-gpt-6-luna-decisions
- Last updated: November 11, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Gemini 3.1 Flash-Lite and GPT-6 Luna (Decisions).

## Summary

- Gemini 3.1 Flash-Lite and GPT-6 Luna (Decisions) 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 3.1 Flash-Lite | GPT-6 Luna (Decisions) |
|----------|----------|----------|
| Creator | Google | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Unspecified |
| Context | 1M | 1.05M |
| Independent public score (not head-to-head) | 46.52 | null |
| Benchmarks Covered | 12 | 0 |
| Pricing (input/output) | $0.25 / $1.50 | $0.10 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 3.1 Flash-Lite public-lane score: 30.4 (Estimated · #105/132)
- GPT-6 Luna (Decisions) public-lane score: Coming soon

| Benchmark | Gemini 3.1 Flash-Lite | GPT-6 Luna (Decisions) | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 38.46% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 34.1% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Gemini 3.1 Flash-Lite public-lane score: 29.3 (Estimated · #111/158)
- GPT-6 Luna (Decisions) public-lane score: Coming soon

| Benchmark | Gemini 3.1 Flash-Lite | GPT-6 Luna (Decisions) | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 0.00% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 80.1% | Coming soon | Coming soon |
| SWE-bench (Vals) | 62.8% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 3.1 Flash-Lite public-lane score: Coming soon
- GPT-6 Luna (Decisions) public-lane score: Coming soon

| Benchmark | Gemini 3.1 Flash-Lite | GPT-6 Luna (Decisions) | Winner |
|-----------|-----------|-----------|--------|
| JevBench 1.4 | 14.26 | Coming soon | Coming soon |
| JevBench 1.5 | 19.58 | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 3.1 Flash-Lite public-lane score: 49.5 (Supported · #57/67)
- GPT-6 Luna (Decisions) public-lane score: Coming soon

| Benchmark | Gemini 3.1 Flash-Lite | GPT-6 Luna (Decisions) | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 56.66% | Coming soon | Coming soon |
| CharXiv | 73.2% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 3.1 Flash-Lite public-lane score: 45.8 (Estimated · #95/179)
- GPT-6 Luna (Decisions) public-lane score: Coming soon

| Benchmark | Gemini 3.1 Flash-Lite | GPT-6 Luna (Decisions) | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 81.1% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.2% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Gemini 3.1 Flash-Lite public-lane score: 40.2 (Unranked · 1 rankable row)
- GPT-6 Luna (Decisions) public-lane score: Coming soon

| Benchmark | Gemini 3.1 Flash-Lite | GPT-6 Luna (Decisions) | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 27.719% | Coming soon | Coming soon |

## FAQ

### Can I compare Gemini 3.1 Flash-Lite and GPT-6 Luna (Decisions) 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 3.1 Flash-Lite vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-gemini-3-1-flash-lite)
- [GPT-6 Luna (Decisions) vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-gpt-6-luna-decisions)
- [Gemini 3.1 Flash-Lite vs Gemini 4 Carbon](/compare/gemini-3-1-flash-lite-vs-gemini-4-carbon)
- [GPT-6 Luna (Decisions) vs Gemini 4 Carbon](/compare/gemini-4-carbon-vs-gpt-6-luna-decisions)

## Explore More

- [Gemini 3.1 Flash-Lite profile](/models/gemini-3-1-flash-lite)
- [GPT-6 Luna (Decisions) profile](/models/gpt-6-luna-decisions)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)