# Grok 4.1 Fast vs MiMo-V2.5

> Side-by-side benchmark comparison for Grok 4.1 Fast and MiMo-V2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-1-fast-vs-mimo-v2-5
- Last updated: September 4, 2026

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: Grok 4.1 Fast and MiMo-V2.5 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.
- MiMo-V2.5 has the lower published output-token price.

## Model Snapshot

| Property | Grok 4.1 Fast | MiMo-V2.5 |
|----------|----------|----------|
| Creator | xAI | Xiaomi |
| Type | Proprietary | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 49.8 | 60.72 |
| Benchmarks Covered | 1 | 15 |
| Pricing (input/output) | $0.20 / $0.50 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: Coming soon
- MiMo-V2.5 public-lane score: 51.1 (Estimated · #58/151)

| Benchmark | Grok 4.1 Fast | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| Gert Labs | 47.32% | 46.89% | Grok 4.1 Fast |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| MM-ClawBench | Coming soon | 23.8% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 65.8% | Coming soon |
| ResearchClawBench | Coming soon | 16.9% | Coming soon |
| Terminal-Bench 2.1 (Vals) | Coming soon | 60.7% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 47.5 (Estimated · #88/183)
- MiMo-V2.5 public-lane score: 54.8 (Estimated · #45/183)

| Benchmark | Grok 4.1 Fast | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Pro | Coming soon | 56.1% | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 65.8% | Coming soon |
| LiveCodeBench (Vals) | Coming soon | 81.5% | Coming soon |
| SWE-bench (Vals) | Coming soon | 71.0% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 31.1 (Unranked · 1 rankable row)
- MiMo-V2.5 public-lane score: 58.5 (#29/48)

| Benchmark | Grok 4.1 Fast | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| Video-MME (with subtitle) | Coming soon | 87.7% | Coming soon |
| CharXiv | Coming soon | 81% | Coming soon |
| MMMU-Pro | Coming soon | 77.9% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 41.7 (Unranked · 2 rankable rows)
- MiMo-V2.5 public-lane score: Coming soon

### Knowledge

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 42.2 (Estimated · #129/181)
- MiMo-V2.5 public-lane score: 53.8 (Estimated · #65/181)

| Benchmark | Grok 4.1 Fast | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA Diamond (Vals) | Coming soon | 81.6% | Coming soon |
| MMLU-Pro (Vals) | Coming soon | 82.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Grok 4.1 Fast public-lane score: 41.8 (#99/120)
- MiMo-V2.5 public-lane score: Coming soon

## FAQ

### Is there enough evidence to pick between Grok 4.1 Fast and MiMo-V2.5?

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

- [Grok 4.1 Fast vs Grok 4.1 Fast (Reasoning)](/compare/grok-4-1-fast-vs-grok-4-1-fast-reasoning)
- [MiMo-V2.5 vs Grok 4.1 Fast (Reasoning)](/compare/grok-4-1-fast-reasoning-vs-mimo-v2-5)
- [Grok 4.1 Fast vs MiMo-V2.5-Pro](/compare/grok-4-1-fast-vs-mimo-v2-5-pro)
- [MiMo-V2.5 vs MiMo-V2.5-Pro](/compare/mimo-v2-5-vs-mimo-v2-5-pro)

## Explore More

- [Grok 4.1 Fast profile](/models/grok-4-1-fast)
- [MiMo-V2.5 profile](/models/mimo-v2-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)