# GPT-5.6 Luna vs Beam

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

- Canonical page: https://benchlm.ai/compare/gpt-5-6-luna-vs-reflection-beam
- Last updated: October 5, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

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

## Summary

- GPT-5.6 Luna leads overall 66.03 to 0.
- The biggest single benchmark swing is DeepSWE in Coding, with scores of 67.2% and 44.4%.
- Beam is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- GPT-5.6 Luna also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.6 Luna | Beam |
|----------|----------|----------|
| Creator | OpenAI | Reflection AI |
| Type | Proprietary | Pending |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | null |
| Overall Score | 66.03 | null |
| Benchmarks Covered | 31 | 16 |
| Pricing (input/output) | $0.20 / $1.20 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 55 (Supported · #34/119)
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 14.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 84.7% | 80.1% | GPT-5.6 Luna |
| BrowseComp | 83.3% | 77.4% | GPT-5.6 Luna |
| OSWorld 2.0 | 45.6% | Coming soon | Coming soon |
| CyberGym | 77.9% | Coming soon | Coming soon |
| ExploitGym | 12.4% | Coming soon | Coming soon |
| Toolathlon | 53.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 79.0% | Coming soon | Coming soon |
| ApprenticeBench | 7% | Coming soon | Coming soon |
| MCP Atlas | Coming soon | 78.7% | Coming soon |
| DeepSearchQA | Coming soon | 80.1% | Coming soon |

### Coding

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 63.4 (Supported · #13/144)
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 62.7% | 65.5% | Beam |
| Terminal-Bench 2.1 | 84.7% | 80.1% | GPT-5.6 Luna |
| DeepSWE | 67.2% | 44.4% | GPT-5.6 Luna |
| 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 |
| SWE-Atlas Codebase QnA | Coming soon | 34.6% | Coming soon |
| SWE Multilingual | Coming soon | 78% | Coming soon |
| SWE-bench Verified | Coming soon | 80.9% | Coming soon |
| SciCode | Coming soon | 49.7% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 54.5 (#25/27)
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | 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 |
| LongBench v2 | Coming soon | 65.5% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 68.1 (#21/49)
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 78.4% | Coming soon | Coming soon |
| MMMU-Pro w/ Python | 79.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 64.7 (Supported · #25/171)
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.3% | Coming soon | Coming soon |
| GPQA-D | 92.3% | 90.5% | GPT-5.6 Luna |
| 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 w/o tools | Coming soon | 36.2% | Coming soon |

### Instruction Following

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: Coming soon
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | Winner |
|-----------|-----------|-----------|--------|
| IFBench | Coming soon | 79.7% | Coming soon |

### Mathematics

- Winner: Not comparable
- GPT-5.6 Luna public-lane score: 94.2 (Unranked · 3 rankable rows)
- Beam public-lane score: Coming soon

| Benchmark | GPT-5.6 Luna | Beam | 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 |
| AIME26 | Coming soon | 97.8% | Coming soon |

## FAQ

### Which is better overall, GPT-5.6 Luna or Beam?

GPT-5.6 Luna is ahead overall on BenchLM right now.

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

GPT-5.6 Luna currently has 31 sourced benchmark scores on BenchLM.

### How many benchmarks does Beam cover on BenchLM?

Beam currently has 16 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)
- [Beam vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-reflection-beam)
- [GPT-5.6 Luna vs GPT-5.6 Terra](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)
- [Beam vs GPT-5.6 Terra](/compare/gpt-5-6-terra-vs-reflection-beam)

## Explore More

- [GPT-5.6 Luna profile](/models/gpt-5-6-luna)
- [Beam profile](/models/reflection-beam)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)