# GPT-5.6 Terra vs Muse Spark

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

- Canonical page: https://benchlm.ai/compare/gpt-5-6-terra-vs-muse-spark
- Last updated: September 24, 2026

- Shared sourced benchmarks: 11
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.7

## Quick Verdict

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

## Summary

- GPT-5.6 Terra leads overall 72.58 to 60.81.
- The clearest category separation is in mathematics, where the averages are 96.8 for GPT-5.6 Terra and 55.1 for Muse Spark.
- The biggest single benchmark swing is FrontierMath v2 (Tier 4) in Mathematics, with scores of 68.300% and 14.600%.
- GPT-5.6 Terra also has the larger context window at 1.05M.

## Model Snapshot

| Property | GPT-5.6 Terra | Muse Spark |
|----------|----------|----------|
| Creator | OpenAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1.05M | 262K |
| Overall Score | 72.58 | 60.81 |
| Benchmarks Covered | 32 | 27 |
| Pricing (input/output) | $2.00 / $12.00 | N/A |

## Category Breakdown

### Agentic

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 59.5 (Supported · #18/105)
- Muse Spark public-lane score: 53 (Supported · #33/105)

| Benchmark | GPT-5.6 Terra | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 3.0 | 20.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 87.4% | Coming soon | Coming soon |
| BrowseComp | 87.5% | Coming soon | Coming soon |
| OSWorld 2.0 | 50.2% | Coming soon | Coming soon |
| CyberGym | 81.8% | 43.5% | GPT-5.6 Terra |
| ExploitGym | 23.2% | Coming soon | Coming soon |
| Toolathlon | 53.1% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 77.5% | Coming soon | Coming soon |
| ApprenticeBench | 16% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 59% | Coming soon |
| τ²-bench results | Coming soon | 91.5% | Coming soon |
| DeepSearchQA | Coming soon | 74.8% | Coming soon |
| Claw-Eval | Coming soon | 63.8% | Coming soon |

### Coding

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 64.7 (Supported · #8/135)
- Muse Spark public-lane score: 53.4 (Supported · #32/135)

| Benchmark | GPT-5.6 Terra | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | 63.4% | 52.4% | GPT-5.6 Terra |
| Terminal-Bench 2.1 | 87.4% | Coming soon | Coming soon |
| DeepSWE | 69.6% | Coming soon | Coming soon |
| FrontierCode 1.1 Extended | 55.8% | Coming soon | Coming soon |
| cursorBench32 | 64.9% | Coming soon | Coming soon |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 85.9% | Coming soon | Coming soon |
| SWE-bench (Vals) | 95.4% | 74.4% | GPT-5.6 Terra |
| SWE-bench Verified | Coming soon | 77.4% | Coming soon |
| LiveCodeBench Pro | Coming soon | 80.0% | Coming soon |
| Vibe Code Bench | Coming soon | 19.67% | Coming soon |

### Reasoning

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 65.4 (#12/19)
- Muse Spark public-lane score: 53.3 (Unranked · 3 rankable rows)

| Benchmark | GPT-5.6 Terra | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 83.9% | 42.5% | GPT-5.6 Terra |
| ARC-AGI-3 | 0.8% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Directional only
- GPT-5.6 Terra public-lane score: 77.2 (#16/50)
- Muse Spark public-lane score: 77.5 (#14/50)

| Benchmark | GPT-5.6 Terra | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 80.7% | 80.4% | GPT-5.6 Terra |
| MMMU-Pro w/ Python | 82% | Coming soon | Coming soon |
| CharXiv | Coming soon | 86.4% | Coming soon |
| ERQA | Coming soon | 64.7% | Coming soon |
| SimpleVQA | Coming soon | 71.3% | Coming soon |
| ScreenSpot Pro | Coming soon | 84.1% | Coming soon |
| ZeroBench | Coming soon | 33.0% | Coming soon |
| MedXpertQA (MM) | Coming soon | 78.4% | Coming soon |

### Knowledge

- Winner: GPT-5.6 Terra
- GPT-5.6 Terra public-lane score: 71.1 (Supported · #9/158)
- Muse Spark public-lane score: 60.8 (Supported · #33/158)

| Benchmark | GPT-5.6 Terra | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 92.9% | Coming soon | Coming soon |
| GPQA-D | 92.9% | 89.5% | GPT-5.6 Terra |
| HLE-Verified | 51.1% | Coming soon | Coming soon |
| LABBench2 | 81.2% | Coming soon | Coming soon |
| HealthBench Professional | 57.7% | Coming soon | Coming soon |
| HealthBench Hard | 32.7% | 42.8% | Muse Spark |
| GPQA Diamond (Vals) | 90.9% | 89.6% | GPT-5.6 Terra |
| MMLU-Pro (Vals) | 86.7% | 87.3% | Muse Spark |
| HLE | Coming soon | 50.4% | Coming soon |
| HLE w/o tools | Coming soon | 42.8% | Coming soon |
| MedXpertQA (Text) | Coming soon | 52.6% | Coming soon |

### Instruction Following

- Winner: Directional only
- GPT-5.6 Terra public-lane score: 85.7 (#35/124)
- Muse Spark public-lane score: 91.9 (#8/124)

### Mathematics

- Winner: Not comparable
- GPT-5.6 Terra public-lane score: 96.8 (Unranked · 3 rankable rows)
- Muse Spark public-lane score: 55.1 (Unranked · 2 rankable rows)

| Benchmark | GPT-5.6 Terra | Muse Spark | Winner |
|-----------|-----------|-----------|--------|
| FrontierMath (legacy) | 84.9% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 84.900% | 39.000% | GPT-5.6 Terra |
| FrontierMath v2 (Tier 4) | 68.300% | 14.600% | GPT-5.6 Terra |

## FAQ

### Which is better overall, GPT-5.6 Terra or Muse Spark?

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

### Where is the biggest gap between GPT-5.6 Terra and Muse Spark?

The widest category gap is in mathematics, where the averages are 96.8 for GPT-5.6 Terra and 55.1 for Muse Spark.

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

GPT-5.6 Terra currently has 32 sourced benchmark scores on BenchLM.

### How many benchmarks does Muse Spark cover on BenchLM?

Muse Spark currently has 27 sourced benchmark scores on BenchLM.

## Related Comparisons

- [GPT-5.6 Terra vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-gpt-5-6-terra)
- [Muse Spark vs GPT-5.6 Sol](/compare/gpt-5-6-sol-vs-muse-spark)
- [GPT-5.6 Terra vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-gpt-5-6-terra)
- [Muse Spark vs GPT-5.6 Luna](/compare/gpt-5-6-luna-vs-muse-spark)

## Explore More

- [GPT-5.6 Terra profile](/models/gpt-5-6-terra)
- [Muse Spark profile](/models/muse-spark)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)