# Kimi K2.5 (Reasoning) vs o3-mini

> Side-by-side benchmark comparison for Kimi K2.5 (Reasoning) and o3-mini across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/kimi-k2-5-reasoning-vs-o3-mini
- Last updated: September 10, 2026

- Shared sourced benchmarks: 2
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Kimi K2.5 (Reasoning) and o3-mini share only 2 sourced benchmark rows.

## Summary

- Only 2 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Kimi K2.5 (Reasoning) has the lower published output-token price.
- o3-mini has the larger published context window at 200K.

## Model Snapshot

| Property | Kimi K2.5 (Reasoning) | o3-mini |
|----------|----------|----------|
| Creator | Moonshot AI | OpenAI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 200K |
| Independent public score (not head-to-head) | 57 | 46.83 |
| Benchmarks Covered | 9 | 5 |
| Pricing (input/output) | $0.60 / $3.00 | $1.10 / $4.40 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 48.2 (Estimated · #65/152)
- o3-mini public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 50.8% | Coming soon | Coming soon |
| BrowseComp | 60.6% | Coming soon | Coming soon |
| Gert Labs | 32.58% | Coming soon | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 50.7 (Estimated · #53/151)
- o3-mini public-lane score: 45.3 (Estimated · #88/151)

| Benchmark | Kimi K2.5 (Reasoning) | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 76.8% | 49.3% | Kimi K2.5 (Reasoning) |
| Vibe Code Bench | 17.54% | Coming soon | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 63.2 (Unranked · 1 rankable row)
- o3-mini public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 78.5% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 50.7 (Estimated · #75/183)
- o3-mini public-lane score: 39.7 (Supported · #134/183)

| Benchmark | Kimi K2.5 (Reasoning) | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87.6% | 77.2% | Kimi K2.5 (Reasoning) |
| MMLU-Pro | 87.1% | Coming soon | Coming soon |
| MMLU | Coming soon | 86.9% | Coming soon |

### Instruction Following

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: Coming soon
- o3-mini public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| IFEval | Coming soon | 93.9% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: Coming soon
- o3-mini public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | o3-mini | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 96.1% | Coming soon | Coming soon |
| AIME 2024 | Coming soon | 87.3% | Coming soon |

## FAQ

### Is there enough evidence to pick between Kimi K2.5 (Reasoning) and o3-mini?

Not yet. The models share only 2 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

- [Kimi K2.5 (Reasoning) vs Kimi K2.5](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)
- [o3-mini vs Kimi K2.5](/compare/kimi-k2-5-vs-o3-mini)
- [Kimi K2.5 (Reasoning) vs o3](/compare/kimi-k2-5-reasoning-vs-o3)
- [o3-mini vs o3](/compare/o3-vs-o3-mini)

## Explore More

- [Kimi K2.5 (Reasoning) profile](/models/kimi-k2-5-reasoning)
- [o3-mini profile](/models/o3-mini)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)