Grok 4.3 vs Muse Spark 1.2
Grok 4.3 
Muse Spark 1.2 Verdict
- Muse Spark 1.2 leads on quality: 62.7 vs 60.7.
- Grok 4.3 (medium) is stronger in agents & tools, instruction following, multimodal.
- Muse Spark 1.2 is stronger in composite, knowledge, long context, coding, maths, reasoning.
- Grok 4.3 (medium) is 1.3× cheaper ($1.56 vs $2.00 per 1M blended).
- Muse Spark 1.2 streams 1.7× faster (193 vs 112 tokens per second).
| Metric | Grok 4.3 (medium) | Muse Spark 1.2 |
|---|---|---|
| BenchLeader Index | 60.7 | 62.7 |
| Agents & tools score | 60.1 | – |
| Composite score | 60.3 | 79.3 |
| Instruction following score | 80.0 | – |
| Knowledge score | 72.1 | 77.1 |
| Long context score | 64.0 | 66.0 |
| Multimodal score | 60.2 | – |
| Coding score | – | 66.5 |
| Maths score | – | 54.3 |
| Reasoning score | – | 70.7 |
| Blended price $/M | $1.56 | $2.00 |
| Output speed | 112 tok/s | 193 tok/s |
| Time to first answer | 12.1 s | 23.4 s |
| Context window | 1M | 1.0M |
| SimpleBench | – | 74.5% |
| ProofBench | – | 43.0% |
| Epoch Capabilities Index | – | 155.5 |
| AA Intelligence Index | 24.8 | 39.8 |
| IFBench | 83.3% | – |
| AA-LCR | 75.0% | 79.0% |
| MMMU-Pro | 75.8% | – |
| AA-Omniscience | 16.7 | 27.2 |
| Terminal-Bench Hard | 30.3% | – |
| GPQA Diamond (AA) | 89.0% | 90.4% |
| Humanity's Last Exam (AA) | 30.0% | 45.5% |
| SciCode (AA) | – | 57.4% |
| τ²-Bench Telecom (AA) | 91.2% | – |
| IOI | – | 49.5% |
Data as of 2026-09-10. Best configuration of each model; every score links to its source on the model pages.
Grok 4.3 vs Muse Spark 1.2: questions
- Is Grok 4.3 better than Muse Spark 1.2?
- Muse Spark 1.2 leads on quality: 62.7 vs 60.7. The BenchLeader Index combines every independent quality benchmark; Muse Spark 1.2 is ahead overall as of 2026-09-10, but check the category scores for your use.
- Which is cheaper, Grok 4.3 or Muse Spark 1.2?
- Grok 4.3 is cheaper: $1.56 against $2.00 per million tokens, blended at three input tokens per output token.
- Which is faster, Grok 4.3 or Muse Spark 1.2?
- Muse Spark 1.2 streams faster: 193 against 112 output tokens per second.
- Which has the larger context window?
- Muse Spark 1.2 accepts more context: 1.0M against 1M tokens.