# GLM-5 vs Mellum2-12B-A2.5B-Instruct

> Side-by-side benchmark comparison for GLM-5 and Mellum2-12B-A2.5B-Instruct across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/glm-5-vs-mellum2-12b-a2-5b-instruct
- Last updated: September 4, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: GLM-5 and Mellum2-12B-A2.5B-Instruct share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- GLM-5 has the larger published context window at 200K.

## Model Snapshot

| Property | GLM-5 | Mellum2-12B-A2.5B-Instruct |
|----------|----------|----------|
| Creator | Z.AI | JetBrains |
| Type | Open Weight | Open Weight |
| Reasoning | Non-Reasoning | Non-Reasoning |
| Context | 200K | 128K |
| Independent public score (not head-to-head) | 62.16 | null |
| Benchmarks Covered | 36 | 6 |
| Pricing (input/output) | $1.00 / $3.20 | N/A |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 50 (Estimated · #65/151)
- Mellum2-12B-A2.5B-Instruct public-lane score: 47.8 (Estimated · #82/151)

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 56.2% | Coming soon | Coming soon |
| Claw-Eval | 57.7% | Coming soon | Coming soon |
| QwenClawBench | 54.1% | Coming soon | Coming soon |
| τ³-bench results | 65.6% | Coming soon | Coming soon |
| DeepPlanning | 14.6% | Coming soon | Coming soon |
| Toolathlon | 38% | Coming soon | Coming soon |
| MCP Atlas | 31.1% | Coming soon | Coming soon |
| MCP-Tasks | 60.8% | Coming soon | Coming soon |
| WideResearch | 69.8% | Coming soon | Coming soon |
| CyberGym | 43.2% | Coming soon | Coming soon |
| Gert Labs | 50.99% | Coming soon | Coming soon |
| BFCL v4 | Coming soon | 44.2% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 49.1 (Supported · #80/183)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 77.8% | Coming soon | Coming soon |
| SWE-bench Verified* | 72.8% | Coming soon | Coming soon |
| SWE-bench Pro | 55.1% | Coming soon | Coming soon |
| SWE Multilingual | 73.3% | Coming soon | Coming soon |
| SWE-Rebench | 62.8% | Coming soon | Coming soon |
| React Native Evals | 74.8% | Coming soon | Coming soon |
| LiveCodeBench v6 | Coming soon | 37.2% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 51.6 (Unranked · 4 rankable rows)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 60.8% | Coming soon | Coming soon |
| AI-Needle | 63.3% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 54.9 (Estimated · #62/181)
- Mellum2-12B-A2.5B-Instruct public-lane score: 48.1 (Estimated · #103/181)

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 86% | 40.9% | GLM-5 |
| GPQA-D | 86.0% | 40.9% | GLM-5 |
| SuperGPQA | 66.8% | Coming soon | Coming soon |
| MMLU-Pro | 85.7% | Coming soon | Coming soon |
| MMLU-Pro (Arcee) | 85.8% | Coming soon | Coming soon |
| HLE | 50.4% | Coming soon | Coming soon |
| MMLU-Redux | Coming soon | 78.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 88.3 (#31/120)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 92.6% | 75.8% | GLM-5 |

### Multilingual

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 48.7 (#6/12)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 83.1% | Coming soon | Coming soon |
| NOVA-63 | 55.1% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- GLM-5 public-lane score: 56.9 (#7/7)
- Mellum2-12B-A2.5B-Instruct public-lane score: Coming soon

| Benchmark | GLM-5 | Mellum2-12B-A2.5B-Instruct | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 95.8% | Coming soon | Coming soon |
| AIME25 (Arcee) | 93.3% | Coming soon | Coming soon |
| HMMT Feb 2025 | 97.5% | Coming soon | Coming soon |
| HMMT Nov 2025 | 96.9% | Coming soon | Coming soon |
| HMMT Feb 2026 | 86.4% | Coming soon | Coming soon |
| MMAnswerBench | 82.5% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 16.434% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 2.100% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between GLM-5 and Mellum2-12B-A2.5B-Instruct?

Not yet. The models share only 3 sourced benchmark rows, 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

- [GLM-5 vs GLM-5.3](/compare/glm-5-vs-glm-5-3)
- [Mellum2-12B-A2.5B-Instruct vs GLM-5.3](/compare/glm-5-3-vs-mellum2-12b-a2-5b-instruct)
- [GLM-5 vs GLM-5.2](/compare/glm-5-vs-glm-5-2)
- [Mellum2-12B-A2.5B-Instruct vs GLM-5.2](/compare/glm-5-2-vs-mellum2-12b-a2-5b-instruct)

## Explore More

- [GLM-5 profile](/models/glm-5)
- [Mellum2-12B-A2.5B-Instruct profile](/models/mellum2-12b-a2-5b-instruct)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)