# Muse Spark Open vs Ornith-1.5-397B

> Side-by-side benchmark comparison for Muse Spark Open and Ornith-1.5-397B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/muse-spark-open-vs-ornith-1-5-397b
- Last updated: October 15, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Muse Spark Open and Ornith-1.5-397B share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Ornith-1.5-397B has the lower published output-token price.
- Muse Spark Open has the larger published context window at 1M.

## Model Snapshot

| Property | Muse Spark Open | Ornith-1.5-397B |
|----------|----------|----------|
| Creator | Meta | Ornith AI |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 262K |
| Independent public score (not head-to-head) | 62.66 | 62.4 |
| Benchmarks Covered | 7 | 18 |
| Pricing (input/output) | Pricing unavailable / Pricing unavailable | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Muse Spark Open public-lane score: 60.2 (Estimated · #27/127)
- Ornith-1.5-397B public-lane score: 58.8 (Estimated · #32/127)

| Benchmark | Muse Spark Open | Ornith-1.5-397B | Winner |
|-----------|-----------|-----------|--------|
| JobBench | 61.8% | Coming soon | Coming soon |
| MCP Atlas | 89.2% | 80% | Muse Spark Open |
| HLE w/ tools | 61.0% | 56.1% | Muse Spark Open |
| Toolathlon-Verified | 72.8% | 71.2% | Muse Spark Open |
| Terminal-Bench 2.1 | Coming soon | 86.1% | Coming soon |
| WideResearch | Coming soon | 80.8% | Coming soon |
| BrowseComp | Coming soon | 86.6% | Coming soon |
| Claw-Eval | Coming soon | 81.4% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Muse Spark Open public-lane score: 56.1 (Supported · #29/150)
- Ornith-1.5-397B public-lane score: 53.4 (Estimated · #36/150)

| Benchmark | Muse Spark Open | Ornith-1.5-397B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | Coming soon | 86.1% | Coming soon |
| SWE-bench Verified | Coming soon | 86% | Coming soon |
| SWE-bench Pro | Coming soon | 65.1% | Coming soon |
| SWE Multilingual | Coming soon | 79.6% | Coming soon |
| DeepSWE | Coming soon | 56.0% | Coming soon |
| frontierBench | Coming soon | 13.5% | Coming soon |
| NL2Repo | Coming soon | 59.5% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Muse Spark Open public-lane score: 79.6 (Unranked · 2 rankable rows)
- Ornith-1.5-397B public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Muse Spark Open public-lane score: 83.6 (Unranked · 4 rankable rows)
- Ornith-1.5-397B public-lane score: Coming soon

| Benchmark | Muse Spark Open | Ornith-1.5-397B | Winner |
|-----------|-----------|-----------|--------|
| ZeroBench | 50.0% | Coming soon | Coming soon |
| BabyVision | 80.2% | Coming soon | Coming soon |
| SimpleVQA | 73.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Muse Spark Open public-lane score: 64.6 (Supported · #38/184)
- Ornith-1.5-397B public-lane score: 64.6 (Estimated · #39/184)

| Benchmark | Muse Spark Open | Ornith-1.5-397B | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 92.8% | Coming soon |
| GPQA-D | Coming soon | 92.8% | Coming soon |
| HLE | Coming soon | 44.6% | Coming soon |
| HLE w/o tools | Coming soon | 44.6% | Coming soon |

## FAQ

### Is there enough evidence to pick between Muse Spark Open and Ornith-1.5-397B?

Not yet. The models share only 3 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

- [Muse Spark Open vs Ornith-1.5-35B-A3B](/compare/muse-spark-open-vs-ornith-1-5-35b-a3b)
- [Ornith-1.5-397B vs Ornith-1.5-35B-A3B](/compare/ornith-1-5-35b-a3b-vs-ornith-1-5-397b)
- [Muse Spark Open vs Ornith-1.5-9B](/compare/muse-spark-open-vs-ornith-1-5-9b)
- [Ornith-1.5-397B vs Ornith-1.5-9B](/compare/ornith-1-5-397b-vs-ornith-1-5-9b)

## Explore More

- [Muse Spark Open profile](/models/muse-spark-open)
- [Ornith-1.5-397B profile](/models/ornith-1-5-397b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)