# Muse Spark 1.2 vs Quasar 438B

> Side-by-side benchmark comparison for Muse Spark 1.2 and Quasar 438B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/muse-spark-1-2-vs-quasar-438b
- Last updated: October 17, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Muse Spark 1.2 and Quasar 438B share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Quasar 438B has the lower published output-token price.

## Model Snapshot

| Property | Muse Spark 1.2 | Quasar 438B |
|----------|----------|----------|
| Creator | Meta | Multiverse Computing |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 65.84 | 48.46 |
| Benchmarks Covered | 9 | 2 |
| Pricing (input/output) | $1.25 / $4.25 | $0.60 / $1.80 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 60.9 (Supported · #25/128)
- Quasar 438B public-lane score: 40 (Estimated · #67/128)

| Benchmark | Muse Spark 1.2 | Quasar 438B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 82.9% | 69.3% | Muse Spark 1.2 |
| Terminal-Bench 2.1 (Vals) | 69.7% | Coming soon | Coming soon |
| MazeBench | 0% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 52.6 (Supported · #40/150)
- Quasar 438B public-lane score: 41.2 (Estimated · #63/150)

| Benchmark | Muse Spark 1.2 | Quasar 438B | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 82.9% | 69.3% | Muse Spark 1.2 |
| DeepSWE | 59.3% | Coming soon | Coming soon |
| 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)
- Quasar 438B public-lane score: 78.3 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Muse Spark 1.2 public-lane score: 65.4 (Supported · #35/184)
- Quasar 438B public-lane score: 46.7 (Estimated · #92/184)

| Benchmark | Muse Spark 1.2 | Quasar 438B | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro (Vals) | 88.3% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Muse Spark 1.2 and Quasar 438B?

Not yet. The models share only 2 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)
- [Quasar 438B vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-quasar-438b)
- [Muse Spark 1.2 vs Muse Spark](/compare/muse-spark-vs-muse-spark-1-2)
- [Quasar 438B vs Muse Spark](/compare/muse-spark-vs-quasar-438b)

## Explore More

- [Muse Spark 1.2 profile](/models/muse-spark-1-2)
- [Quasar 438B profile](/models/quasar-438b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)