# Muse Spark 1.2 vs Ultramarine 1 Flash

> Side-by-side benchmark comparison for Muse Spark 1.2 and Ultramarine 1 Flash across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/muse-spark-1-2-vs-ultramarine-1-flash
- 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 1.2 and Ultramarine 1 Flash 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.
- Ultramarine 1 Flash has the lower published output-token price.
- Muse Spark 1.2 has the larger published context window at 1M.

## Model Snapshot

| Property | Muse Spark 1.2 | Ultramarine 1 Flash |
|----------|----------|----------|
| Creator | Meta | Paper Instruments |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | Not disclosed |
| Independent public score (not head-to-head) | 65.77 | null |
| Benchmarks Covered | 8 | 5 |
| Pricing (input/output) | $1.25 / $4.25 | $0.15 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 60.9 (Supported · #25/126)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Muse Spark 1.2 | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 82.9% | 83.2% | Ultramarine 1 Flash |
| Terminal-Bench 2.1 (Vals) | 69.7% | Coming soon | Coming soon |
| JobBench | Coming soon | 62.9% | Coming soon |
| AutomationBench | Coming soon | 50.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 52.7 (Supported · #39/149)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Muse Spark 1.2 | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 82.9% | 83.2% | Ultramarine 1 Flash |
| DeepSWE | 59.3% | 61.5% | Ultramarine 1 Flash |
| VulcanBench v3 | 87.0% | Coming soon | Coming soon |
| FrontierSWE v2 | 12.0% | Coming soon | Coming soon |
| SWE-bench (Vals) | 86.6% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 80.1 (Unranked · 2 rankable rows)
- Ultramarine 1 Flash public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 65.1 (Supported · #35/182)
- Ultramarine 1 Flash public-lane score: Coming soon

| Benchmark | Muse Spark 1.2 | Ultramarine 1 Flash | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro (Vals) | 88.3% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Muse Spark 1.2 and Ultramarine 1 Flash?

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 1.2 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-2)
- [Ultramarine 1 Flash vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-ultramarine-1-flash)
- [Muse Spark 1.2 vs Muse Spark](/compare/muse-spark-vs-muse-spark-1-2)
- [Ultramarine 1 Flash vs Muse Spark](/compare/muse-spark-vs-ultramarine-1-flash)

## Explore More

- [Muse Spark 1.2 profile](/models/muse-spark-1-2)
- [Ultramarine 1 Flash profile](/models/ultramarine-1-flash)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)