# Mercury 3 vs Muse Spark 1.2

> Side-by-side benchmark comparison for Mercury 3 and Muse Spark 1.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/mercury-3-vs-muse-spark-1-2
- Last updated: October 19, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Evidence is too thin for a benchmark verdict: Mercury 3 and Muse Spark 1.2 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.
- Mercury 3 has the lower published output-token price.

## Model Snapshot

| Property | Mercury 3 | Muse Spark 1.2 |
|----------|----------|----------|
| Creator | Inception | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | null | 65.9 |
| Benchmarks Covered | 8 | 9 |
| Pricing (input/output) | $0.10 / $0.35 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Mercury 3 public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: 60.8 (Supported · #26/130)

| Benchmark | Mercury 3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| τ³-bench results | 30.2% | Coming soon | Coming soon |
| BrowseComp+ | 55.18% | Coming soon | Coming soon |
| DeepSearchQA | 71.3% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 82.9% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 69.7% | Coming soon |
| MazeBench | Coming soon | 0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Mercury 3 public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: 52.6 (Supported · #40/151)

| Benchmark | Mercury 3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 46.3% | 59.3% | Muse Spark 1.2 |
| Terminal-Bench 2.1 | Coming soon | 82.9% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| FrontierSWE v2 | Coming soon | 12.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 86.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Mercury 3 public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: 79.3 (Unranked · 2 rankable rows)

| Benchmark | Mercury 3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| MRCRv2 | 75.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Mercury 3 public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: 65.2 (Supported · #35/186)

| Benchmark | Mercury 3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 89.2% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 88.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Mercury 3 public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: Coming soon

| Benchmark | Mercury 3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 76.8% | Coming soon | Coming soon |
| MultiChallenge (provider reports) | 60.35% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Mercury 3 and Muse Spark 1.2?

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

- [Mercury 3 vs Muse Spark 1.1](/compare/mercury-3-vs-muse-spark-1-1)
- [Muse Spark 1.2 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-2)
- [Mercury 3 vs Muse Spark](/compare/mercury-3-vs-muse-spark)
- [Muse Spark 1.2 vs Muse Spark](/compare/muse-spark-vs-muse-spark-1-2)

## Explore More

- [Mercury 3 profile](/models/mercury-3)
- [Muse Spark 1.2 profile](/models/muse-spark-1-2)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)