# Gemini 4 Carbon vs Muse Spark 1.2

> Side-by-side benchmark comparison for Gemini 4 Carbon and Muse Spark 1.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/gemini-4-carbon-vs-muse-spark-1-2
- Last updated: October 28, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: Gemini 4 Carbon 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.
- Muse Spark 1.2 has the lower published output-token price.
- Muse Spark 1.2 has the larger published context window at 1M.

## Model Snapshot

| Property | Gemini 4 Carbon | Muse Spark 1.2 |
|----------|----------|----------|
| Creator | Google | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | null | 1M |
| Independent public score (not head-to-head) | 88.42 | 65.46 |
| Benchmarks Covered | 9 | 9 |
| Pricing (input/output) | $2.00 / $10.00 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: 59.9 (Supported · #29/134)

| Benchmark | Gemini 4 Carbon | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| AutomationBench | 53.9% | Coming soon | Coming soon |
| OSWorld 2.1 Offline | 81.5% | Coming soon | Coming soon |
| CWE-bench v1 | 71.0% | Coming soon | Coming soon |
| ExploitGym | 53.5% | 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
- Gemini 4 Carbon public-lane score: 82.2 (Supported · #3/156)
- Muse Spark 1.2 public-lane score: 53.2 (Supported · #38/156)

| Benchmark | Gemini 4 Carbon | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| FrontierSWE v2 | 61.2% | 12.0% | Gemini 4 Carbon |
| Terminal-Bench 2.1 | Coming soon | 82.9% | Coming soon |
| DeepSWE | Coming soon | 59.3% | Coming soon |
| VulcanBench v3 | Coming soon | 87.0% | Coming soon |
| SWE-bench (Vals) | Coming soon | 86.6% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 79.5 (Unranked · 2 rankable rows)
- Muse Spark 1.2 public-lane score: 79.3 (Unranked · 2 rankable rows)

| Benchmark | Gemini 4 Carbon | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| GraphWalks BFS 256K–1M | 96.2% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| Chartography (no tools) | 72.5% | Coming soon | Coming soon |
| Blueprint-Bench 2 | 58.6% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: 88.2 (Supported · #2/178)
- Muse Spark 1.2 public-lane score: 64.6 (Supported · #32/178)

| Benchmark | Gemini 4 Carbon | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-Pro (Vals) | Coming soon | 88.3% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Gemini 4 Carbon public-lane score: Coming soon
- Muse Spark 1.2 public-lane score: Coming soon

| Benchmark | Gemini 4 Carbon | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| Gray Swan IPI (15 attempts) | 0.0% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Gemini 4 Carbon 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

- [Gemini 4 Carbon vs Gemini 4 Argon](/compare/gemini-4-argon-vs-gemini-4-carbon)
- [Muse Spark 1.2 vs Gemini 4 Argon](/compare/gemini-4-argon-vs-muse-spark-1-2)
- [Gemini 4 Carbon vs Muse Spark 1.1](/compare/gemini-4-carbon-vs-muse-spark-1-1)
- [Muse Spark 1.2 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-2)

## Explore More

- [Gemini 4 Carbon profile](/models/gemini-4-carbon)
- [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)