# Kimi K2.5 vs Mercury 2.5

> Side-by-side benchmark comparison for Kimi K2.5 and Mercury 2.5 across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/kimi-k2-5-vs-mercury-2-5
- Last updated: September 8, 2026

- Shared sourced benchmarks: 4
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Pick Kimi K2.5 if you want the stronger benchmark profile. Mercury 2.5 only makes more sense when its price, context window, or workload-specific category wins matter more than the overall score.

## Summary

- Kimi K2.5 leads overall 54.02 to 53.
- The clearest category separation is in reasoning, where the averages are 54.1 for Kimi K2.5 and 67.7 for Mercury 2.5.
- The biggest single benchmark swing is DeepSearchQA in Agentic, with scores of 77.1% and 34.0%.
- Mercury 2.5 is the cheaper option on output tokens, which matters if you expect large responses or heavy interactive use.
- Mercury 2.5 also has the larger context window at 260K.

## Model Snapshot

| Property | Kimi K2.5 | Mercury 2.5 |
|----------|----------|----------|
| Creator | Moonshot AI | Inception |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 256K | 260K |
| Overall Score | 54.02 | null |
| Benchmarks Covered | 45 | 5 |
| Pricing (input/output) | $0.60 / $3.00 | $0.04 / $0.15 |

## Category Breakdown

### Agentic

- Winner: Coming soon
- Kimi K2.5 public-lane score: 46.4 (Estimated · #79/152)
- Mercury 2.5 public-lane score: 44.5 (Estimated · #91/152)

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| Terminal-Bench 2.0 | 50.8% | Coming soon | Coming soon |
| BrowseComp | 60.6% | Coming soon | Coming soon |
| Claw-Eval | 52.3% | Coming soon | Coming soon |
| QwenClawBench | 54.3% | Coming soon | Coming soon |
| τ³-bench results | 65.7% | 96.0% | Mercury 2.5 |
| DeepSearchQA | 77.1% | 34.0% | Kimi K2.5 |
| DeepPlanning | 14.4% | Coming soon | Coming soon |
| Toolathlon | 27.8% | Coming soon | Coming soon |
| MCP Atlas | 29.5% | Coming soon | Coming soon |
| MCP-Tasks | 59.1% | Coming soon | Coming soon |
| WideResearch | 72.7% | Coming soon | Coming soon |
| Gert Labs | 45.88% | Coming soon | Coming soon |
| ResearchClawBench | 14.0% | Coming soon | Coming soon |
| JobBench | 8.7% | Coming soon | Coming soon |

### Coding

- Winner: Coming soon
- Kimi K2.5 public-lane score: 50.6 (Estimated · #59/151)
- Mercury 2.5 public-lane score: 47.8 (Estimated · #73/151)

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 76.8% | Coming soon | Coming soon |
| SWE-bench Verified* | 70.8% | Coming soon | Coming soon |
| LiveCodeBench v6 | 85.0% | Coming soon | Coming soon |
| SWE-bench Pro | 50.7% | Coming soon | Coming soon |
| SWE Multilingual | 73% | Coming soon | Coming soon |
| SWE-Rebench | 58.5% | Coming soon | Coming soon |
| React Native Evals | 77.2% | Coming soon | Coming soon |
| SciCode | 48.7% | 38% | Kimi K2.5 |

### Multimodal & Grounded

- Winner: Coming soon
- Kimi K2.5 public-lane score: 65.7 (#24/48)
- Mercury 2.5 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 78.5% | Coming soon | Coming soon |
| Video-MME | 87.4% | Coming soon | Coming soon |
| MMVU | 80.4% | Coming soon | Coming soon |
| VideoMMMU | 86.6% | Coming soon | Coming soon |

### Reasoning

- Winner: Coming soon
- Kimi K2.5 public-lane score: 54.1 (Unranked · 3 rankable rows)
- Mercury 2.5 public-lane score: 67.7 (Unranked · 1 rankable row)

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 61% | Coming soon | Coming soon |

### Knowledge

- Winner: Coming soon
- Kimi K2.5 public-lane score: 52.2 (Estimated · #69/182)
- Mercury 2.5 public-lane score: 48.3 (Estimated · #94/182)

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87.6% | Coming soon | Coming soon |
| GPQA-D | 87.6% | 79.0% | Kimi K2.5 |
| SuperGPQA | 69.2% | Coming soon | Coming soon |
| MMLU-Pro | 87.1% | Coming soon | Coming soon |
| MMLU-Pro (Arcee) | 87.1% | Coming soon | Coming soon |
| HLE | 30.1% | Coming soon | Coming soon |

### Instruction Following

- Winner: Coming soon
- Kimi K2.5 public-lane score: 85.8 (#40/121)
- Mercury 2.5 public-lane score: 80.1 (#53/121)

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 93.9% | Coming soon | Coming soon |
| IFBench | Coming soon | 77% | Coming soon |

### Multilingual

- Winner: Coming soon
- Kimi K2.5 public-lane score: 38.2 (#8/12)
- Mercury 2.5 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 82.3% | Coming soon | Coming soon |
| NOVA-63 | 56.0% | Coming soon | Coming soon |

### Mathematics

- Winner: Coming soon
- Kimi K2.5 public-lane score: 62.4 (#5/7)
- Mercury 2.5 public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Mercury 2.5 | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 96.1% | Coming soon | Coming soon |
| AIME26 | 95.8% | Coming soon | Coming soon |
| AIME25 (Arcee) | 96.3% | Coming soon | Coming soon |
| HMMT Feb 2025 | 95.4% | Coming soon | Coming soon |
| HMMT Nov 2025 | 91.1% | Coming soon | Coming soon |
| HMMT Feb 2026 | 87.1% | Coming soon | Coming soon |
| MMAnswerBench | 81.8% | Coming soon | Coming soon |
| FrontierMath v2 (Tiers 1-3) | 27.900% | Coming soon | Coming soon |
| FrontierMath v2 (Tier 4) | 4.200% | Coming soon | Coming soon |

## FAQ

### Which is better overall, Kimi K2.5 or Mercury 2.5?

Kimi K2.5 is ahead overall on BenchLM right now.

### Where is the biggest gap between Kimi K2.5 and Mercury 2.5?

The widest category gap is in reasoning, where the averages are 54.1 for Kimi K2.5 and 67.7 for Mercury 2.5.

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

Kimi K2.5 currently has 45 sourced benchmark scores on BenchLM.

### How many benchmarks does Mercury 2.5 cover on BenchLM?

Mercury 2.5 currently has 5 sourced benchmark scores on BenchLM.

## Related Comparisons

- [Kimi K2.5 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)
- [Mercury 2.5 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-reasoning-vs-mercury-2-5)
- [Kimi K2.5 vs Mercury 2.5 Preview](/compare/kimi-k2-5-vs-mercury-2-5-preview)
- [Mercury 2.5 vs Mercury 2.5 Preview](/compare/mercury-2-5-vs-mercury-2-5-preview)

## Explore More

- [Kimi K2.5 profile](/models/kimi-k2-5)
- [Mercury 2.5 profile](/models/mercury-2-5)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)