# MiMo-V2.6-Pro vs Spark-X2.6-4B

> Side-by-side benchmark comparison for MiMo-V2.6-Pro and Spark-X2.6-4B across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/mimo-v2-6-pro-vs-spark-x2-6-4b
- Last updated: October 20, 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 MiMo-V2.6-Pro and Spark-X2.6-4B.

## Summary

- MiMo-V2.6-Pro and Spark-X2.6-4B 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 | MiMo-V2.6-Pro | Spark-X2.6-4B |
|----------|----------|----------|
| Creator | Xiaomi | SparkLLM |
| Type | Open Weight | Open Weight |
| Reasoning | Reasoning | Reasoning |
| Context | 1M | 1M |
| Independent public score (not head-to-head) | 73.66 | 40.14 |
| Benchmarks Covered | 14 | 20 |
| Pricing (input/output) | $0.435 / $0.87 | $0.00 / $0.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- MiMo-V2.6-Pro public-lane score: 67.9 (Estimated · #13/131)
- Spark-X2.6-4B public-lane score: 33 (Estimated · #89/131)

| Benchmark | MiMo-V2.6-Pro | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| Toolathlon-Verified | 76.9% | Coming soon | Coming soon |
| AutomationBench | 53.1% | Coming soon | Coming soon |
| Agents' Last Exam | 31.6% | Coming soon | Coming soon |
| Terminal-Bench 4.0 | 34.90% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 89.9% | Coming soon | Coming soon |
| OSWorld-Verified | 82% | Coming soon | Coming soon |
| JobBench | 62.0% | Coming soon | Coming soon |
| CyberGym | 94.0% | Coming soon | Coming soon |
| ExploitGym | 17.8% | Coming soon | Coming soon |
| BFCL v4 | Coming soon | 71.8% | Coming soon |
| τ²-bench results | Coming soon | 86.9% | Coming soon |
| MCP Atlas | Coming soon | 62.4% | Coming soon |
| BrowseComp | Coming soon | 53.1% | Coming soon |
| HLE w/ tools | Coming soon | 36.9% | Coming soon |
| τ³-bench results | Coming soon | 34.7% | Coming soon |
| Claw-Eval | Coming soon | 69.9% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- MiMo-V2.6-Pro public-lane score: 63.3 (Supported · #13/152)
- Spark-X2.6-4B public-lane score: 30.6 (Estimated · #95/152)

| Benchmark | MiMo-V2.6-Pro | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| DeepSWE | 71.9% | Coming soon | Coming soon |
| ProgramBench | 26.5% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 89.9% | Coming soon | Coming soon |
| Bug Hunt Bench | 22.7 fixes | Coming soon | Coming soon |
| SWE-bench Pro | Coming soon | 54.3% | Coming soon |
| SWE-bench Verified | Coming soon | 62.8% | Coming soon |
| SWE Multilingual | Coming soon | 64.7% | Coming soon |
| SciCode | Coming soon | 36.8% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- MiMo-V2.6-Pro public-lane score: 82.5 (Unranked · 2 rankable rows)
- Spark-X2.6-4B public-lane score: 48.8 (Unranked · 2 rankable rows)

| Benchmark | MiMo-V2.6-Pro | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| STEMBench | 2.17 | Coming soon | Coming soon |
| LongBench v2 | Coming soon | 53.3% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- MiMo-V2.6-Pro public-lane score: 69.4 (Supported · #19/187)
- Spark-X2.6-4B public-lane score: 43 (Estimated · #109/187)

| Benchmark | MiMo-V2.6-Pro | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| GPQA-D | Coming soon | 77.1% | Coming soon |
| HLE w/o tools | Coming soon | 17.9% | Coming soon |
| GPQA | Coming soon | 69.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- MiMo-V2.6-Pro public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 78.2 (#62/149)

| Benchmark | MiMo-V2.6-Pro | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 93.6% | Coming soon |
| IFBench | Coming soon | 75.8% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- MiMo-V2.6-Pro public-lane score: Coming soon
- Spark-X2.6-4B public-lane score: 76.4 (Unranked · 3 rankable rows)

| Benchmark | MiMo-V2.6-Pro | Spark-X2.6-4B | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | Coming soon | 91.2% | Coming soon |
| HMMT Feb 2026 | Coming soon | 81.3% | Coming soon |
| IMOAnswerBench | Coming soon | 75.2% | Coming soon |

## FAQ

### Can I compare MiMo-V2.6-Pro and Spark-X2.6-4B 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

- [MiMo-V2.6-Pro vs MiMo-V2.6-Flash](/compare/mimo-v2-6-flash-vs-mimo-v2-6-pro)
- [Spark-X2.6-4B vs MiMo-V2.6-Flash](/compare/mimo-v2-6-flash-vs-spark-x2-6-4b)
- [MiMo-V2.6-Pro vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-mimo-v2-6-pro)
- [Spark-X2.6-4B vs Claude Opus 5.5](/compare/claude-opus-5-5-vs-spark-x2-6-4b)

## Explore More

- [MiMo-V2.6-Pro profile](/models/mimo-v2-6-pro)
- [Spark-X2.6-4B profile](/models/spark-x2-6-4b)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)