# Grok 4.3 vs Muse Spark 1.2

> Side-by-side benchmark comparison for Grok 4.3 and Muse Spark 1.2 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-3-vs-muse-spark-1-2
- Last updated: September 18, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: Grok 4.3 and Muse Spark 1.2 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.
- Grok 4.3 has the lower published output-token price.

## Model Snapshot

| Property | Grok 4.3 | Muse Spark 1.2 |
|----------|----------|----------|
| Creator | xAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 59.73 | 70.28 |
| Benchmarks Covered | 7 | 8 |
| Pricing (input/output) | $1.25 / $2.50 | $1.25 / $4.25 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 26.8 (Supported · #148/154)
- Muse Spark 1.2 public-lane score: 61 (Supported · #16/154)

| Benchmark | Grok 4.3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 43.86% | Coming soon | Coming soon |
| ResearchClawBench | 12.4% | Coming soon | Coming soon |
| Terminal-Bench 2.1 (Vals) | 41.9% | 69.7% | Muse Spark 1.2 |
| Terminal-Bench 2.1 | Coming soon | 82.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 33.6 (Supported · #135/154)
- Muse Spark 1.2 public-lane score: 60 (Supported · #21/154)

| Benchmark | Grok 4.3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench (Vals) | 84.5% | Coming soon | Coming soon |
| SWE-bench (Vals) | 71.4% | 86.6% | Muse Spark 1.2 |
| 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 |
| FrontierSWE v2 | Coming soon | 12.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 65.7 (#25/48)
- Muse Spark 1.2 public-lane score: Coming soon

### Reasoning

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 65.2 (Unranked · 2 rankable rows)
- Muse Spark 1.2 public-lane score: 75.3 (Unranked · 2 rankable rows)

### Knowledge

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 56.9 (Supported · #44/184)
- Muse Spark 1.2 public-lane score: 70.7 (Estimated · #10/184)

| Benchmark | Grok 4.3 | Muse Spark 1.2 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | 91.4% | Coming soon | Coming soon |
| MMLU-Pro (Vals) | 85.8% | 88.3% | Muse Spark 1.2 |

### Instruction Following

- Winner: Insufficient shared evidence
- Grok 4.3 public-lane score: 93.2 (#2/124)
- Muse Spark 1.2 public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between Grok 4.3 and Muse Spark 1.2?

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

- [Grok 4.3 vs Muse Spark 1.1](/compare/grok-4-3-vs-muse-spark-1-1)
- [Muse Spark 1.2 vs Muse Spark 1.1](/compare/muse-spark-1-1-vs-muse-spark-1-2)
- [Grok 4.3 vs Muse Spark](/compare/grok-4-3-vs-muse-spark)
- [Muse Spark 1.2 vs Muse Spark](/compare/muse-spark-vs-muse-spark-1-2)

## Explore More

- [Grok 4.3 profile](/models/grok-4-3)
- [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)