# GPT-5.6 Luna vs Kimi K3.1 Pro

> Side-by-side benchmark comparison for GPT-5.6 Luna and Kimi K3.1 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-5-6-luna-vs-kimi-3-1-pro
- Last updated: October 23, 2026

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

## Quick Verdict

Pick Kimi K3.1 Pro if you want the stronger benchmark profile. GPT-5.6 Luna only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Kimi K3.1 Pro leads overall 82 to 64.33.
- The clearest category separation is in multimodal & grounded, where the averages are 80 for GPT-5.6 Luna and 98 for Kimi K3.1 Pro.
- The biggest single benchmark swing is OSWorld 2.0 in Agentic, with scores of 45.6% and 79.6%.
- GPT-5.6 Luna is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | GPT-5.6 Luna | Kimi K3.1 Pro |
|----------|----------|----------|
| Creator | OpenAI | Moonshot AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1.05M |
| Overall Score | 64.33 | null |
| Benchmarks Covered | 34 | 42 |
| Pricing (input/output) | $0.20 / $1.20 | $2.00 / $10.00 |

## Category Breakdown

### Agentic

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 56 (Supported · #41/132)
- Kimi K3.1 Pro public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Kimi K3.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 84.7% | Coming soon | Coming soon |
| BrowseComp | 83.3% | 92.1% | Kimi K3.1 Pro |
| OSWorld 2.0 | 45.6% | 79.6% | Kimi K3.1 Pro |
| CyberGym | 77.9% | Coming soon | Coming soon |
| ExploitGym | 12.4% | 20.7% | Kimi K3.1 Pro |
| Toolathlon | 53.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 79.0% | Coming soon | Coming soon |
| ApprenticeBench | 7% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 65.70% | Coming soon |
| Terminal-Bench-Science 0.1 | Coming soon | 38.1% | Coming soon |
| HLE w/ tools | Coming soon | 70.0% | Coming soon |
| BioMysteryBench | Coming soon | 80.6% | Coming soon |
| Agents' Last Exam | Coming soon | 43.2% | Coming soon |
| Agents' Last Exam (CLI) | Coming soon | 44.2% | Coming soon |
| APEX-Agents | Coming soon | 67.2% | Coming soon |
| Frontier Finance | Coming soon | 58.6% | Coming soon |
| HANDBOOK.md | Coming soon | 44.6% | Coming soon |
| Business Operation | Coming soon | 37.8% | Coming soon |
| Financial Modeling | Coming soon | 57.6% | Coming soon |
| Financial Research | Coming soon | 70.4% | Coming soon |
| Kimi Hallu Bench Hard (tools) | Coming soon | 8.3% | Coming soon |

### Coding

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 61.6 (Supported · #16/153)
- Kimi K3.1 Pro public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Kimi K3.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 62.7% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 84.7% | Coming soon | Coming soon |
| DeepSWE | 67.2% | 75.5% | Kimi K3.1 Pro |
| FrontierCode 1.1 Extended | 55.1% | Coming soon | Coming soon |
| CursorBench 3.2 | 61.1% | Coming soon | Coming soon |
| VulcanBench v3 | 85.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 93.0% | Coming soon | Coming soon |
| CursorBench 4.0 | 35.9% | Coming soon | Coming soon |
| ProgramBench (binary) | Coming soon | 31.5% | Coming soon |
| Kimi Code Bench v2 | Coming soon | 77.1% | Coming soon |
| Kimi Code Bench 3.0 Long-horizon | Coming soon | 61.2% | Coming soon |
| sweMarathon | Coming soon | 51.7% | Coming soon |
| PostTrainBench v1.2 | Coming soon | 36.5% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 58.2 (#26/27)
- Kimi K3.1 Pro public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Kimi K3.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 59.5% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.2% | Coming soon | Coming soon |
| ARC-AGI-1 | 88.00% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.6 Luna public-lane score: 80 (#19/56)
- Kimi K3.1 Pro public-lane score: 98 (#1/56)

| Benchmark | GPT-5.6 Luna | Kimi K3.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| ExtractBench (LlamaIndex) | 91.16% | Coming soon | Coming soon |
| ParseBench | 68.34% | Coming soon | Coming soon |
| MMMU-Pro | 78.4% | 84.1% | Kimi K3.1 Pro |
| MMMU-Pro w/ Python | 79.5% | 90% | Kimi K3.1 Pro |
| OfficeQA Pro | Coming soon | 67.4% | Coming soon |
| OfficeQA Pro v2 | Coming soon | 64.4% | Coming soon |
| BenchCAD Vision2Code (no tools) | Coming soon | 0.728 | Coming soon |
| BenchCAD Vision2Code (tools) | Coming soon | 0.927 | Coming soon |
| CharXiv | Coming soon | 93.4% | Coming soon |
| CharXiv w/o tools | Coming soon | 89% | Coming soon |
| Chartography (tools) | Coming soon | 90.2% | Coming soon |
| BabyVision w/ Python | Coming soon | 95.4% | Coming soon |
| ZeroBench | Coming soon | 39.0% | Coming soon |
| ZeroBench w/ Python | Coming soon | 63.0% | Coming soon |
| GDP.pdf (Gemini judge) | Coming soon | 34.6% | Coming soon |
| GDP.pdf w/ Python (Gemini judge) | Coming soon | 85.7% | Coming soon |
| PerceptionBench | Coming soon | 68.3% | Coming soon |

### Knowledge

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 64.2 (Supported · #39/187)
- Kimi K3.1 Pro public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Kimi K3.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.3% | 94.2% | Kimi K3.1 Pro |
| GPQA-D | 92.3% | 94.2% | Kimi K3.1 Pro |
| HealthBench Professional | 55.7% | Coming soon | Coming soon |
| HealthBench Hard | 32.0% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 91.7% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 86.0% | Coming soon | Coming soon |
| HLE | Coming soon | 70% | Coming soon |
| HLE w/o tools | Coming soon | 51.1% | Coming soon |
| Kimi Hallu Bench | Coming soon | 5.4% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 84 (Unranked · 3 rankable rows)
- Kimi K3.1 Pro public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Kimi K3.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 78.6% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 78.600% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 58.500% | Coming soon | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Luna or Kimi K3.1 Pro?

Kimi K3.1 Pro is ahead overall on BenchLM right now.

### Where is the biggest gap between GPT-5.6 Luna and Kimi K3.1 Pro?

The widest category gap is in multimodal & grounded, where the averages are 80 for GPT-5.6 Luna and 98 for Kimi K3.1 Pro.

### How many benchmarks does GPT-5.6 Luna cover on BenchLM?

GPT-5.6 Luna currently has 34 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K3.1 Pro cover on BenchLM?

Kimi K3.1 Pro currently has 42 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.6 Luna vs GPT-5.6 Sol](/compare/gpt-5-6-luna-vs-gpt-5-6-sol)
- [Kimi K3.1 Pro vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-kimi-3-1-pro)
- [GPT-5.6 Luna vs GPT-5.6 Terra](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)
- [Kimi K3.1 Pro vs GPT-5.6 Terra](/compare/gpt-5-6-terra-vs-kimi-3-1-pro)

## Explore More

- [GPT-5.6 Luna profile](/models/gpt-5-6-luna)
- [Kimi K3.1 Pro profile](/models/kimi-3-1-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)