# Grok 4.20 vs MiMo-V2.5

> Side-by-side benchmark comparison for Grok 4.20 and MiMo-V2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/grok-4-20-beta-vs-mimo-v2-5
- Last updated: September 4, 2026

- Shared sourced benchmarks: 10
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Grok 4.20 if you want the stronger benchmark profile. MiMo-V2.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Grok 4.20 leads overall 67.01 to 60.72.
- The clearest category separation is in coding, where the averages are 28.2 for Grok 4.20 and 54.8 for MiMo-V2.5.
- The biggest single benchmark swing is CharXiv in Multimodal & Grounded, with scores of 60.9% and 81%.
- MiMo-V2.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Grok 4.20 also has the larger context window at 2M.

## Model Snapshot

| Property | Grok 4.20 | MiMo-V2.5 |
|----------|----------|----------|
| Creator | xAI | Xiaomi |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 2M | 1M |
| Overall Score | 67.01 | 60.72 |
| Benchmarks Covered | 23 | 15 |
| Pricing (input/output) | $2.00 / $6.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Grok 4.20 public-lane score: 26.5 (Supported · #144/151)
- MiMo-V2.5 public-lane score: 51.1 (Estimated · #58/151)

| Benchmark | Grok 4.20 | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 47.1% | 65.8% | MiMo-V2.5 |
| DeepSearchQA | 62.8% | Coming soon | Coming soon |
| Gert Labs | 38.36% | 46.89% | MiMo-V2.5 |
| Terminal-Bench 2.1 (Vals) | 44.2% | 60.7% | MiMo-V2.5 |
| Claw-Eval | Coming soon | 62.3% | Coming soon |
| MM-ClawBench | Coming soon | 23.8% | Coming soon |
| ResearchClawBench | Coming soon | 16.9% | Coming soon |

### Coding

- Winner: Coming soon
- Grok 4.20 public-lane score: 28.2 (Supported · #171/183)
- MiMo-V2.5 public-lane score: 54.8 (Estimated · #45/183)

| Benchmark | Grok 4.20 | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench Pro | 74.2% | Coming soon | Coming soon |
| SWE-bench Verified | 76.7% | Coming soon | Coming soon |
| SWE-bench Pro | 51.8% | 56.1% | MiMo-V2.5 |
| Vibe Code Bench | 4.06% | Coming soon | Coming soon |
| LiveCodeBench (Vals) | 84.3% | 81.5% | Grok 4.20 |
| SWE-bench (Vals) | 72.2% | 71.0% | Grok 4.20 |
| Terminal-Bench 2.0 | Coming soon | 65.8% | Coming soon |

### Multimodal & Grounded

- Winner: MiMo-V2.5
- Grok 4.20 public-lane score: 34.1 (#43/48)
- MiMo-V2.5 public-lane score: 58.5 (#29/48)

| Benchmark | Grok 4.20 | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 75.2% | 77.9% | MiMo-V2.5 |
| CharXiv | 60.9% | 81% | MiMo-V2.5 |
| ERQA | 54.1% | Coming soon | Coming soon |
| SimpleVQA | 57.4% | Coming soon | Coming soon |
| MedXpertQA (MM) | 65.8% | Coming soon | Coming soon |
| Video-MME (with subtitle) | Coming soon | 87.7% | Coming soon |

### Reasoning

- Winner: Coming soon
- Grok 4.20 public-lane score: 34.2 (Unranked · 2 rankable rows)
- MiMo-V2.5 public-lane score: Coming soon

| Benchmark | Grok 4.20 | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| ARC-AGI-2 | 53.3% | Coming soon | Coming soon |
| ARC-AGI-3 | 0.1% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Grok 4.20 public-lane score: 48.8 (Supported · #96/181)
- MiMo-V2.5 public-lane score: 53.8 (Estimated · #65/181)

| Benchmark | Grok 4.20 | MiMo-V2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | 88.5% | Coming soon | Coming soon |
| HLE w/o tools | 31.6% | Coming soon | Coming soon |
| HealthBench Hard | 20.3% | Coming soon | Coming soon |
| MedXpertQA (Text) | 50.2% | Coming soon | Coming soon |
| GPQA Diamond (Vals) | 88.6% | 81.6% | Grok 4.20 |
| MMLU-Pro (Vals) | 86.3% | 82.9% | Grok 4.20 |

## FAQ

### Which is better overall, Grok 4.20 or MiMo-V2.5?

Grok 4.20 is ahead overall on BenchLM right now.

### Where is the biggest gap between Grok 4.20 and MiMo-V2.5?

The widest category gap is in coding, where the averages are 28.2 for Grok 4.20 and 54.8 for MiMo-V2.5.

### How many benchmarks does Grok 4.20 cover on BenchLM?

Grok 4.20 currently has 23 sourced benchmark scores on BenchLM.

### How many benchmarks does MiMo-V2.5 cover on BenchLM?

MiMo-V2.5 currently has 15 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Grok 4.20 vs Grok 4.20 Multi-agent](/compare/grok-4-20-beta-vs-grok-4-20-multi-agent-beta)
- [MiMo-V2.5 vs Grok 4.20 Multi-agent](/compare/grok-4-20-multi-agent-beta-vs-mimo-v2-5)
- [Grok 4.20 vs MiMo-V2.5-Pro](/compare/grok-4-20-beta-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 4.20 profile](/models/grok-4-20-beta)
- [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)