# Claude Haiku 4.5 Thinking vs Kimi K2.5 (Reasoning)

> Side-by-side benchmark comparison for Claude Haiku 4.5 Thinking and Kimi K2.5 (Reasoning) across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/claude-haiku-4-5-thinking-vs-kimi-k2-5-reasoning
- Last updated: September 4, 2026

- Shared sourced benchmarks: 1
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Claude Haiku 4.5 Thinking and Kimi K2.5 (Reasoning) share only 1 sourced benchmark row.

## Summary

- Only 1 shared sourced benchmark row is available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Claude Haiku 4.5 Thinking has the larger published context window at 200K.

## Model Snapshot

| Property | Claude Haiku 4.5 Thinking | Kimi K2.5 (Reasoning) |
|----------|----------|----------|
| Creator | Anthropic | Moonshot AI |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 200K | 128K |
| Independent public score (not head-to-head) | null | 58.74 |
| Benchmarks Covered | 1 | 9 |
| Pricing (input/output) | N/A | $0.60 / $3.00 |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 49.9 (Estimated · #67/151)

| Benchmark | Claude Haiku 4.5 Thinking | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| 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
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 52.9 (Estimated · #52/183)

| Benchmark | Claude Haiku 4.5 Thinking | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| Vibe Code Bench | 11.39% | 17.54% | Kimi K2.5 (Reasoning) |
| SWE-bench Verified | Coming soon | 76.8% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 63.2 (Unranked · 1 rankable row)

| Benchmark | Claude Haiku 4.5 Thinking | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | Coming soon | 78.5% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: 52.4 (Estimated · #78/181)

| Benchmark | Claude Haiku 4.5 Thinking | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| GPQA | Coming soon | 87.6% | Coming soon |
| MMLU-Pro | Coming soon | 87.1% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Claude Haiku 4.5 Thinking public-lane score: Coming soon
- Kimi K2.5 (Reasoning) public-lane score: Coming soon

| Benchmark | Claude Haiku 4.5 Thinking | Kimi K2.5 (Reasoning) | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | Coming soon | 96.1% | Coming soon |

## FAQ

### Is there enough evidence to pick between Claude Haiku 4.5 Thinking and Kimi K2.5 (Reasoning)?

Not yet. The models share only 1 sourced benchmark row, 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

- [Claude Haiku 4.5 Thinking vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-claude-haiku-4-5-thinking)
- [Kimi K2.5 (Reasoning) vs Claude Haiku 4.5](/compare/claude-haiku-4-5-vs-kimi-k2-5-reasoning)
- [Claude Haiku 4.5 Thinking vs Kimi K2.5](/compare/claude-haiku-4-5-thinking-vs-kimi-k2-5)
- [Kimi K2.5 (Reasoning) vs Kimi K2.5](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)

## Explore More

- [Claude Haiku 4.5 Thinking profile](/models/claude-haiku-4-5-thinking)
- [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)