# A.X K2 vs Kimi K2.5 (Reasoning)

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

- Canonical page: https://benchlm.ai/compare/a-x-k2-vs-kimi-k2-5-reasoning
- Last updated: September 10, 2026

- Shared sourced benchmarks: 0
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

No benchmark verdict yet: there is no shared sourced benchmark row for A.X K2 and Kimi K2.5 (Reasoning).

## Summary

- A.X K2 and Kimi K2.5 (Reasoning) 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 | A.X K2 | Kimi K2.5 (Reasoning) |
|----------|----------|----------|
| Creator | SK Telecom | Moonshot AI |
| Type | Open Weight | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 262K | 128K |
| Independent public score (not head-to-head) | null | 57 |
| Benchmarks Covered | 10 | 9 |
| Pricing (input/output) | $0.00 / $0.00 | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- A.X K2 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 48.2 (Estimated · #65/152)

| Benchmark | A.X K2 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.1 | 36.0% | Coming soon | Coming soon |
| Terminal-Bench 2.0 | Coming soon | 50.8% | Coming soon |
| BrowseComp | Coming soon | 60.6% | Coming soon |
| Gert Labs | Coming soon | 32.58% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- A.X K2 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 50.7 (Estimated · #53/151)

| Benchmark | A.X K2 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| LiveCodeBench v6 | 84.0% | Coming soon | Coming soon |
| SciCode | 41% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | 36.0% | Coming soon | Coming soon |
| SWE-bench Verified | Coming soon | 76.8% | Coming soon |
| Vibe Code Bench | Coming soon | 17.54% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- A.X K2 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 63.2 (Unranked · 1 rankable row)

| Benchmark | A.X K2 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 78.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- A.X K2 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 50.7 (Estimated · #75/183)

| Benchmark | A.X K2 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| HLE | 27.8% | Coming soon | Coming soon |
| GPQA-D | 85.6% | Coming soon | Coming soon |
| GPQA | Coming soon | 87.6% | Coming soon |
| MMLU-Pro | Coming soon | 87.1% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- A.X K2 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | A.X K2 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| IFBench | 75.9% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- A.X K2 public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | A.X K2 | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| AIME26 | 97.1% | Coming soon | Coming soon |
| Apex | 45.8% | Coming soon | Coming soon |
| Apex Shortlist | 88.6% | Coming soon | Coming soon |
| AIME 2025 | Coming soon | 96.1% | Coming soon |

## FAQ

### Can I compare A.X K2 and Kimi K2.5 (Reasoning) 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

- [A.X K2 vs A.X series](/compare/a-x-k2-vs-skt-ax)
- [Kimi K2.5 (Reasoning) vs A.X series](/compare/kimi-k2-5-reasoning-vs-skt-ax)
- [A.X K2 vs Kimi K2.5](/compare/a-x-k2-vs-kimi-k2-5)
- [Kimi K2.5 (Reasoning) vs Kimi K2.5](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)

## Explore More

- [A.X K2 profile](/models/a-x-k2)
- [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)