# Kimi K2.5 vs Seed 2.1 Pro

> Side-by-side benchmark comparison for Kimi K2.5 and Seed 2.1 Pro across agentic, coding, multimodal, knowledge, reasoning, multilingual, and math tasks.

- Canonical page: https://benchlm.ai/compare/kimi-k2-5-vs-seed-2-1-pro
- Last updated: September 10, 2026

- Shared sourced benchmarks: 3
- HTML indexing: indexable
- Ranking lane: BenchAlign v5

## Quick Verdict

Evidence is too thin for a benchmark verdict: Kimi K2.5 and Seed 2.1 Pro share only 3 sourced benchmark rows.

## Summary

- Only 3 shared sourced benchmark rows are available. That is not enough for a broad capability verdict, so this mirror does not name an overall winner.
- Seed 2.1 Pro has the lower published output-token price.

## Model Snapshot

| Property | Kimi K2.5 | Seed 2.1 Pro |
|----------|----------|----------|
| Creator | Moonshot AI | ByteDance |
| Type | Open Weight | Proprietary |
| Reasoning | Non-Reasoning | Reasoning |
| Context | 256K | 256K |
| Independent public score (not head-to-head) | 54.01 | null |
| Benchmarks Covered | 45 | 11 |
| Pricing (input/output) | $0.60 / $3.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 46.4 (Estimated · #77/152)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | 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% | Coming soon | Coming soon |
| DeepSearchQA | 77.1% | Coming soon | Coming soon |
| 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 |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 50.6 (Estimated · #55/151)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | 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% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 71.0% | Coming soon |
| NL2Repo | Coming soon | 47% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 65.7 (#24/48)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 78.5% | 81.6% | Seed 2.1 Pro |
| Video-MME | 87.4% | 89.2% | Seed 2.1 Pro |
| MMVU | 80.4% | Coming soon | Coming soon |
| VideoMMMU | 86.6% | Coming soon | Coming soon |
| MathVision | Coming soon | 92.6% | Coming soon |
| ZeroBench | Coming soon | 18.0% | Coming soon |
| BabyVision | Coming soon | 73.7% | Coming soon |
| CharXiv | Coming soon | 85.4% | Coming soon |
| ERQA | Coming soon | 72.0% | Coming soon |

### Reasoning

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 54.1 (Unranked · 3 rankable rows)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| LongBench v2 | 61% | Coming soon | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 52 (Estimated · #69/183)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87.6% | Coming soon | Coming soon |
| GPQA-D | 87.6% | Coming soon | Coming soon |
| SuperGPQA | 69.2% | 70.8% | Seed 2.1 Pro |
| 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: Insufficient shared evidence
- Kimi K2.5 public-lane score: 85.8 (#41/123)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| IFEval | 93.9% | Coming soon | Coming soon |

### Multilingual

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 38.2 (#8/12)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | Winner |
|-----------|-----------|-----------|--------|
| MMLU-ProX | 82.3% | Coming soon | Coming soon |
| NOVA-63 | 56.0% | Coming soon | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Kimi K2.5 public-lane score: 62.4 (#5/7)
- Seed 2.1 Pro public-lane score: Coming soon

| Benchmark | Kimi K2.5 | Seed 2.1 Pro | 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

### Is there enough evidence to pick between Kimi K2.5 and Seed 2.1 Pro?

Not yet. The models share only 3 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 vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)
- [Seed 2.1 Pro vs Kimi K2.5 (Reasoning)](/compare/kimi-k2-5-reasoning-vs-seed-2-1-pro)
- [Kimi K2.5 vs Seed 2.1 Turbo](/compare/kimi-k2-5-vs-seed-2-1-turbo)
- [Seed 2.1 Pro vs Seed 2.1 Turbo](/compare/seed-2-1-pro-vs-seed-2-1-turbo)

## Explore More

- [Kimi K2.5 profile](/models/kimi-k2-5)
- [Seed 2.1 Pro profile](/models/seed-2-1-pro)
- [Compare Pricing](/llm-pricing)
- [Alternative Finder](/tools/alternative-finder)
- [LLM Selector](/tools/llm-selector)
- [Overall Rankings](/best/overall)