# GPT-6.1 Terra vs Muse Spark 1.1

> Side-by-side benchmark comparison for GPT-6.1 Terra and Muse Spark 1.1 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gpt-6-1-terra-vs-muse-spark-1-1
- Last updated: October 26, 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 Spark 1.1 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.
- GPT-6.1 Terra has the larger published context window at 1.05M.

## Model Snapshot

| Property | GPT-6.1 Terra | Muse Spark 1.1 |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 1M |
| Independent public score (not head-to-head) | 75.87 | 66.24 |
| Benchmarks Covered | 10 | 26 |
| Pricing (input/output) | $1.00 / $5.00 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 72.4 (Estimated · #8/133)
- Muse Spark 1.1 public-lane score: 58.5 (Supported · #35/133)

| Benchmark | GPT-6.1 Terra | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | 50.30% | Coming soon | Coming soon |
| 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 |
| Terminal-Bench 2.1 | Coming soon | 80.0% | Coming soon |
| MCP Atlas | Coming soon | 88.1% | Coming soon |
| Toolathlon | Coming soon | 75.6% | Coming soon |
| OSWorld-Verified | Coming soon | 80.8% | Coming soon |
| WebArena-Verified | Coming soon | 69% | Coming soon |
| DeepSearchQA | Coming soon | 84.9% | Coming soon |
| CyberGym | Coming soon | 59.0% | Coming soon |
| Finance Agent v2 | Coming soon | 57.2% | Coming soon |
| deepSwe | Coming soon | 53.3% | Coming soon |
| OSWorld 2.0 | Coming soon | 14.2% | Coming soon |
| JobBench | Coming soon | 54.7% | Coming soon |
| Cybench | Coming soon | 92.9% | Coming soon |
| ExploitGym | Coming soon | 0.8% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 69.3% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: Coming soon
- Muse Spark 1.1 public-lane score: 53 (Supported · #40/154)

| Benchmark | GPT-6.1 Terra | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 80.0% | Coming soon |
| SWE-bench Pro | Coming soon | 61.5% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 85.9% | Coming soon |
| SWE-bench (Vals) | Coming soon | 82.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 81.8 (Unranked · 2 rankable rows)
- Muse Spark 1.1 public-lane score: 78.4 (Unranked · 3 rankable rows)

| Benchmark | GPT-6.1 Terra | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| MRCR 1M | Coming soon | 54.1% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 91.6 (#4/58)
- Muse Spark 1.1 public-lane score: 79 (Unranked · 2 rankable rows)

| Benchmark | GPT-6.1 Terra | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 85.5% | Coming soon | Coming soon |
| CharXiv | Coming soon | 88.4% | Coming soon |
| BabyVision | Coming soon | 76.3% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GPT-6.1 Terra public-lane score: 74.9 (Supported · #12/188)
- Muse Spark 1.1 public-lane score: 67.8 (Supported · #24/188)

| Benchmark | GPT-6.1 Terra | Muse Spark 1.1 | Winner |
|-----------|-----------|-----------|--------|
| HealthBench (raw) | 51.1% | Coming soon | Coming soon |
| HealthBench (length-adjusted) | 55.1% | Coming soon | Coming soon |
| HealthBench Professional | 62.7% | 59.3% | GPT-6.1 Terra |
| HealthBench Professional (raw) | 64.2% | Coming soon | Coming soon |
| HealthBench Hard | 31.4% | Coming soon | Coming soon |
| HLE | Coming soon | 62.1% | Coming soon |
| HLE w/o tools | Coming soon | 52.2% | Coming soon |
| GPQA Diamond (Vals) | Coming soon | 91.2% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.7% | Coming soon |

## FAQ

### Is there enough evidence to pick between GPT-6.1 Terra and Muse Spark 1.1?

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 Spark 1.1 vs GPT-6 Astra](/compare/gpt-6-astra-vs-muse-spark-1-1)
- [GPT-6.1 Terra vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-gpt-6-1-terra)
- [Muse Spark 1.1 vs GPT-6.1 Sol](/compare/gpt-6-1-sol-vs-muse-spark-1-1)

## Explore More

- [GPT-6.1 Terra profile](/models/gpt-6-1-terra)
- [Muse Spark 1.1 profile](/models/muse-spark-1-1)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)