# GPT-6.1 Terra vs Muse Ember

> Side-by-side benchmark comparison for GPT-6.1 Terra and Muse Ember across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-1-terra-vs-muse-ember
- Last updated: November 9, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: GPT-6.1 Terra and Muse Ember share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Muse Ember has the lower published output-token price.
- GPT-6.1 Terra has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-6.1 Terra | Muse Ember |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 80.22 | 56.24 |
| Benchmarks Covered | 16 | 4 |
| Pricing (input/output) | $1.00 / $5.00 | $0.10 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 76 (Estimated · #6/132)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 50.30% | 40.90% | GPT-6.1 Terra |
| Terminal-Bench-Science 0.1 | 58.3% | Coming soon | Coming soon |
| Agents' Last Exam | 60.0% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 74.2% | Coming soon | Coming soon |
| MazeBench | 16% | Coming soon | Coming soon |
| OSWorld 2.1 | Coming soon | 69.5% | Coming soon |
| Agents' Last Exam (Linux) | Coming soon | 61.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 75.4 (Supported · #9/157)
- Muse Ember public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 77.2 (Supported · #8/67)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| ParseBench | 73.64% | Coming soon | Coming soon |
| ExtractBench Pro | 27% | Coming soon | Coming soon |
| ExtractBench (LlamaIndex) | 94.28% | Coming soon | Coming soon |
| MMMU-Pro | 85.5% | Coming soon | Coming soon |
| PerceptionBench (tools) | Coming soon | 80.6% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 76.4 (Supported · #11/179)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 51.1% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 55.1% | Coming soon | Coming soon |
| HealthBench Professional | 62.7% | Coming soon | Coming soon |
| HealthBench Professional (raw) | 64.2% | Coming soon | Coming soon |
| HealthBench Hard | 31.4% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 93.8 (Unranked · 2 rankable rows)
- Muse Ember public-lane score: Coming soon

| Benchmark | GPT-6.1 Terra | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath v2 (Tiers 1-3) | 90.877% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 92.683% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-6.1 Terra and Muse Ember?

Not yet. The models share only 1 sourced benchmark row, 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-6.1 Terra vs GPT-6 Astra](/compare/gpt-6-1-terra-vs-gpt-6-astra)
- [Muse Ember vs GPT-6 Astra](/compare/gpt-6-astra-vs-muse-ember)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)
- [Muse Ember vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-muse-ember)

## Explore More

- [GPT-6.1 Terra profile](/models/gpt-6-1-terra)
- [Muse Ember profile](/models/muse-ember)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)