# Grok 4.1 Fast (Reasoning) vs Muse Ember

> Side-by-side benchmark comparison for Grok 4.1 Fast (Reasoning) and Muse Ember across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-1-fast-reasoning-vs-muse-ember
- Last updated: November 9, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for Grok 4.1 Fast (Reasoning) and Muse Ember.

## Summary

- Grok 4.1 Fast (Reasoning) and Muse Ember do not currently share a sourced benchmark row. The mirror therefore compares metadata, pricing, context windows, and each model's separately reported coverage without naming a benchmark winner.

## Model Snapshot

| Property | Grok 4.1 Fast (Reasoning) | Muse Ember |
|----------|----------|----------|
| Creator | xAI | Meta |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 1M |
| Independent public score (not head-to-head) | 45.34 | 56.24 |
| Benchmarks Covered | 1 | 4 |
| Pricing (input/output) | N/A | $0.10 / $0.50 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Grok 4.1 Fast (Reasoning) public-lane score: Coming soon
- Muse Ember public-lane score: Coming soon

| Benchmark | Grok 4.1 Fast (Reasoning) | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 4.0 | Coming soon | 40.90% | Coming soon |
| OSWorld 2.1 | Coming soon | 69.5% | Coming soon |
| Agents' Last Exam (Linux) | Coming soon | 61.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Grok 4.1 Fast (Reasoning) public-lane score: 27.3 (Estimated · #120/158)
- Muse Ember public-lane score: Coming soon

| Benchmark | Grok 4.1 Fast (Reasoning) | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 1.20% | Coming soon | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Grok 4.1 Fast (Reasoning) public-lane score: 36 (Estimated · #100/157)
- Muse Ember public-lane score: Coming soon

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Grok 4.1 Fast (Reasoning) public-lane score: Coming soon
- Muse Ember public-lane score: Coming soon

| Benchmark | Grok 4.1 Fast (Reasoning) | Muse Ember | Winner |
|-----------|-----------|-----------|--------|
| PerceptionBench (tools) | Coming soon | 80.6% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Grok 4.1 Fast (Reasoning) public-lane score: 42 (Estimated · #109/179)
- Muse Ember public-lane score: Coming soon

### Instruction Following

- Winner: Insufficient shared evidence
- Grok 4.1 Fast (Reasoning) public-lane score: 63 (#86/157)
- Muse Ember public-lane score: Coming soon

## FAQ

### Can I compare Grok 4.1 Fast (Reasoning) and Muse Ember on BenchLM yet?

Not fully yet. BenchLM is tracking both models, but sourced benchmark coverage is still incomplete for a fair score-level comparison.

### Why does this page show "coming soon" values?

BenchLM only calls winners when public benchmark coverage is available on both sides of the comparison.

## Related Comparisons

- [Grok 4.1 Fast (Reasoning) vs Grok 4.1 Fast](/compare/grok-4-1-fast-vs-grok-4-1-fast-reasoning)
- [Muse Ember vs Grok 4.1 Fast](/compare/grok-4-1-fast-vs-muse-ember)
- [Grok 4.1 Fast (Reasoning) vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-grok-4-1-fast-reasoning)
- [Muse Ember vs Claude Fable 5.2](/compare/claude-fable-5-2-vs-muse-ember)

## Explore More

- [Grok 4.1 Fast (Reasoning) profile](/models/grok-4-1-fast-reasoning)
- [Muse Ember profile](/models/muse-ember)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)