# GPT-6 Luna vs Muse Ember

> Side-by-side benchmark comparison for GPT-6 Luna and Muse Ember across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-luna-vs-muse-ember
- Last updated: November 9, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-6 Luna and Muse Ember share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GPT-6 Luna has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-6 Luna | Muse Ember |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 62.38 | 56.24 |
| Benchmarks Covered | 26 | 4 |
| Pricing (input/output) | $0.10 / $0.50 | $0.10 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 53.8 (Estimated · #47/132)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.1 | 15.20% | Coming soon | Coming soon |
| Agents' Last Exam (Linux) | 57.1% | 61.6% | Muse Ember |
| ExploitGym | 11.6% | Coming soon | Coming soon |
| Hermes Index | 33.9% | Coming soon | Coming soon |
| Hermes Bench | 70.5% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 48.9% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | Coming soon | 40.90% | Coming soon |
| OSWorld 2.1 | Coming soon | 69.5% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 51.7 (Supported · #42/158)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 66.6% | Coming soon | Coming soon |
| Bug Hunt Bench | 18.3 fixes | Coming soon | Coming soon |
| FrontierCode 2.0 | 21.9% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 54.4 (Supported · #46/157)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| BioBasicsBench | 37.6% | Coming soon | Coming soon |
| ARC-AGI-1 | 86.67% | Coming soon | Coming soon |
| ARC-AGI-2 | 59.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |
| ARC-AGI-3 Provider Adapter | 0.59% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 63.8 (Supported · #29/67)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| PerceptionBench (tools) | 62.8% | 80.6% | Muse Ember |
| ExtractBench Pro | 0% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | 91.01% | Coming soon | Coming soon |
| ParseBench | 64.13% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 62.2 (Supported · #42/179)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 50.0% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 54.5% | Coming soon | Coming soon |
| HealthBench Professional | 60.8% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 61.2% | Coming soon | Coming soon |
| HealthBench Hard | 31.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-6 Luna public-lane score: 80.2 (Unranked · 2 rankable rows)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6 Luna | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 78.947% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 56.098% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-6 Luna and Muse Ember?

Not yet. The models share only 2 sourced benchmark rows, so this mirror reports the available measurements and metadata without naming a broad winner.

### What can I compare safely on this page?

Published pricing, context windows, model type, and individual shared benchmark rows are directly comparable. Independent overall scores and non-overlapping benchmark coverage are labeled separately and should not be read as a controlled head-to-head result.

## Related Comparisons

- [GPT-6 Luna vs GPT-6 Astra](/compare/gpt-6-astra-vs-gpt-6-luna)
- [Muse Ember vs GPT-6 Astra](/compare/gpt-6-astra-vs-muse-ember)
- [GPT-6 Luna vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-luna)
- [Muse Ember vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-muse-ember)

## Explore More

- [GPT-6 Luna profile](/models/gpt-6-luna)
- [Muse Ember profile](/models/muse-ember)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)