Grok 4.3 Beta vs Muse Spark
Grok 4.3 Beta (xAI) and Muse Spark (Meta AI) compared on benchmarks, pricing, context window, and use-case rankings.
- Muse Spark leads on overall intelligence (ECI 154 vs 149).
- Muse Spark ranks higher for coding (79th vs 31th percentile).
| Attribute | Grok 4.3 Beta | Muse Spark |
|---|---|---|
| Scores | ||
| Intelligence (ECI) | 149 | 154 |
| Coding | 31 | 79 |
| Math | 69 | 66 |
| Reasoning & Knowledge | 50 | 84 |
| Agentic & Tools | — | 64 |
| Specifications | ||
| Developer | xAI | Meta AI |
| Family | Grok | — |
| Released | Apr 17, 2026 | Apr 8, 2026 |
| Parameters | — | — |
| Availability | Hosted access (no API) | API access |
| Context window | — | — |
| Price — $/M input | — | — |
| Price — $/M output | — | — |
| Inputs | — | — |
| Outputs | — | — |
| Benchmarks | ||
| AIME 2024/2025 | 93% | 89% |
| GPQA Diamond | 89% | 90% |
| SimpleQA Verified | 38% | 66% |
| WebDev Arena | 1377 | 1513 |
| WeirdML | 50% | — |
| FrontierMath | — | 39% |
| FrontierMath Tier 4 | — | 15% |
| Humanity's Last Exam | — | 41% |
| SciCode | — | 52% |
| τ²-bench | — | 92% |
Use-case scores are 0–100 percentile composites across each area’s benchmarks, ranked against every model from the past year. Highlighted cells lead each row. Open a model for the full picture.
Frequently asked questions
Is Grok 4.3 Beta better than Muse Spark?
On Epoch AI's Capabilities Index, Muse Spark scores higher (154) than Grok 4.3 Beta (149). The right pick depends on your task — compare their coding, math, and reasoning scores in the table above.
Which is better for coding, Grok 4.3 Beta or Muse Spark?
Across coding benchmarks like SWE-bench Verified and Terminal-Bench, Muse Spark ranks higher — 79th vs 31th percentile among the models tracked on Model Beat.
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Benchmarks & model data from Epoch AI (CC BY); pricing & specs from OpenRouter. ECI = Epoch Capabilities Index.