# Kimi K2.5 (Reasoning) vs Seed 2.1 Turbo

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

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

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

## Quick Verdict

Evidence is too thin for a benchmark verdict: Kimi K2.5 (Reasoning) and Seed 2.1 Turbo 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.
- Seed 2.1 Turbo has the lower published output-token price.
- Seed 2.1 Turbo has the larger published context window at 256K.

## Model Snapshot

| Property | Kimi K2.5 (Reasoning) | Seed 2.1 Turbo |
|----------|----------|----------|
| Creator | Moonshot AI | ByteDance |
| Type | Proprietary | Proprietary |
| Reasoning | Reasoning | Reasoning |
| Context | 128K | 256K |
| Independent public score (not head-to-head) | 57 | null |
| Benchmarks Covered | 9 | 11 |
| Pricing (input/output) | $0.60 / $3.00 | Pricing unavailable / Pricing unavailable |

## Category Breakdown

### Agentic

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 48.2 (Estimated · #65/152)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | Seed 2.1 Turbo | 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 |
| Terminal-Bench 2.1 | Coming soon | 67.6% | Coming soon |

### Coding

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 50.7 (Estimated · #53/151)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| SWE-bench Verified | 76.8% | Coming soon | Coming soon |
| Vibe Code Bench | 17.54% | Coming soon | Coming soon |
| Terminal-Bench 2.1 | Coming soon | 67.6% | Coming soon |
| NL2Repo | Coming soon | 43.7% | Coming soon |

### Multimodal & Grounded

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 63.2 (Unranked · 1 rankable row)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| MMMU-Pro | 78.5% | 80.1% | Seed 2.1 Turbo |
| MathVision | Coming soon | 90.1% | Coming soon |
| ZeroBench | Coming soon | 11.0% | Coming soon |
| BabyVision | Coming soon | 62.9% | Coming soon |
| CharXiv | Coming soon | 82.5% | Coming soon |
| ERQA | Coming soon | 71.3% | Coming soon |
| Video-MME | Coming soon | 89.0% | Coming soon |

### Knowledge

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: 50.7 (Estimated · #75/183)
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| GPQA | 87.6% | Coming soon | Coming soon |
| MMLU-Pro | 87.1% | Coming soon | Coming soon |
| SuperGPQA | Coming soon | 67.4% | Coming soon |

### Mathematics

- Winner: Insufficient shared evidence
- Kimi K2.5 (Reasoning) public-lane score: Coming soon
- Seed 2.1 Turbo public-lane score: Coming soon

| Benchmark | Kimi K2.5 (Reasoning) | Seed 2.1 Turbo | Winner |
|-----------|-----------|-----------|--------|
| AIME 2025 | 96.1% | Coming soon | Coming soon |

## FAQ

### Is there enough evidence to pick between Kimi K2.5 (Reasoning) and Seed 2.1 Turbo?

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

- [Kimi K2.5 (Reasoning) vs Kimi K2.5](/compare/kimi-k2-5-vs-kimi-k2-5-reasoning)
- [Seed 2.1 Turbo vs Kimi K2.5](/compare/kimi-k2-5-vs-seed-2-1-turbo)
- [Kimi K2.5 (Reasoning) vs Seed 2.1 Pro](/compare/kimi-k2-5-reasoning-vs-seed-2-1-pro)
- [Seed 2.1 Turbo vs Seed 2.1 Pro](/compare/seed-2-1-pro-vs-seed-2-1-turbo)

## Explore More

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