# Granite 4.2 8B vs Kimi K2.5 (Reasoning)

> Side-by-side benchmark comparison for Granite 4.2 8B and Kimi K2.5 (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/granite-4-2-8b-vs-kimi-k2-5-reasoning
- Last updated: October 15, 2026

- Shared sourced benchmarks: 6
- HTML indexing: indexable
- Ranking lane: BenchAlign v5.8

## Quick Verdict

Kimi K2.5 (Reasoning) leads by point estimate. Conditional score ranges do not establish rank confidence. Choose using the category evidence and your own workload tests.

## Summary

- Kimi K2.5 (Reasoning) has the higher overall point estimate 56.25 to 33.4. Conditional score ranges do not establish rank confidence.
- The clearest category separation is in agentic, where the averages are 15.7 for Granite 4.2 8B and 38.8 for Kimi K2.5 (Reasoning).
- The biggest single benchmark swing is SWE-bench Verified in Coding, with scores of 47.7% and 76.8%.
- Granite 4.2 8B is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.

## Model Snapshot

| Property | Granite 4.2 8B | Kimi K2.5 (Reasoning) |
|----------|----------|----------|
| Creator | IBM | Moonshot AI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 128K |
| Overall Score | 33.4 | 56.25 |
| Benchmarks Covered | 14 | 15 |
| Pricing (input/output) | $0.00 / $0.00 | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Directional only
- Granite 4.2 8B public-lane score: 15.7 (Estimated · #113/127)
- Kimi K2.5 (Reasoning) public-lane score: 38.8 (Estimated · #69/127)

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 20.6% | Coming soon | Coming soon |
| τ³-bench results | 58.1% | Coming soon | Coming soon |
| BFCL v4 | 52.4% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| BrowseComp | Coming soon | 60.6% | Coming soon |
| OSWorld-Verified | Coming soon | 63.3% | Coming soon |
| Gert Labs | Coming soon | 32.58% | Coming soon |

### Coding

- Winner: Not comparable
- Granite 4.2 8B public-lane score: 17.2 (Estimated · #125/150)
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 47.7% | 76.8% | Kimi K2.5 (Reasoning) |
| SWE-bench Pro | 19.1% | Coming soon | Coming soon |
| SWE Multilingual | 30.8% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 20.6% | Coming soon | Coming soon |
| LiveCodeBench v6 | 73.2% | 85.0% | Kimi K2.5 (Reasoning) |
| SciCode | 36.1% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| Vibe Code Bench | Coming soon | 17.54% | Coming soon |

### Reasoning

- Winner: Not comparable
- Granite 4.2 8B public-lane score: 56.8 (Unranked · 2 rankable rows)
- Kimi K2.5 (Reasoning) public-lane score: 67.1 (Unranked · 1 rankable row)

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | Coming soon | 61% | Coming soon |

### Multimodal & Grounded

- Winner: Not comparable
- Granite 4.2 8B public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 69 (#33/54)

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 78.5% | Coming soon |
| CharXiv | Coming soon | 77.5% | Coming soon |

### Knowledge

- Winner: Directional only
- Granite 4.2 8B public-lane score: 30.6 (Supported · #154/184)
- Kimi K2.5 (Reasoning) public-lane score: 49 (Estimated · #84/184)

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 64.1% | 87.6% | Kimi K2.5 (Reasoning) |
| MMLU-Pro | 74.0% | 87.1% | Kimi K2.5 (Reasoning) |

### Instruction Following

- Winner: Not comparable
- Granite 4.2 8B public-lane score: 86.5 (#41/146)
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 79.3% | Coming soon | Coming soon |

### Mathematics

- Winner: Not comparable
- Granite 4.2 8B public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Granite 4.2 8B | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 86.7% | 96.1% | Kimi K2.5 (Reasoning) |
| HMMT Feb 2025 | 78.3% | 95.4% | Kimi K2.5 (Reasoning) |

## FAQ

### Which is better overall, Granite 4.2 8B or Kimi K2.5 (Reasoning)?

Kimi K2.5 (Reasoning) has the higher overall point estimate. Conditional score ranges do not establish rank confidence.

### Where is the biggest gap between Granite 4.2 8B and Kimi K2.5 (Reasoning)?

The widest category gap is in agentic, where the averages are 15.7 for Granite 4.2 8B and 38.8 for Kimi K2.5 (Reasoning).

### How many benchmarks does Granite 4.2 8B cover on BenchLM?

Granite 4.2 8B currently has 14 sourced benchmark scores on BenchLM.

### How many benchmarks does Kimi K2.5 (Reasoning) cover on BenchLM?

Kimi K2.5 (Reasoning) currently has 15 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Granite 4.2 8B vs Granite 4.2 30B](/compare/granite-4-2-30b-vs-granite-4-2-8b)
- [Kimi K2.5 (Reasoning) vs Granite 4.2 30B](/compare/granite-4-2-30b-vs-kimi-k2-5-reasoning)
- [Granite 4.2 8B vs Granite 4.2 3B](/compare/granite-4-2-3b-vs-granite-4-2-8b)
- [Kimi K2.5 (Reasoning) vs Granite 4.2 3B](/compare/granite-4-2-3b-vs-kimi-k2-5-reasoning)

## Explore More

- [Granite 4.2 8B profile](/models/granite-4-2-8b)
- [Kimi K2.5 (Reasoning) profile](/models/kimi-k2-5-reasoning)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)