$ diff kimi-k2-8-preview longcat-2-0
Kimi K2.8 Preview vs LongCat-2.0
Values come from Kimi K2.8 Preview and LongCat-2.0, where each is cited to its source. This page states no benchmark result and ranks neither model — it puts two published specifications next to each other. Where a lab has not published a figure, the row says so rather than guessing.
Moonshot AIKimi K2.8 Preview
- context
- 1M
- weights
- closed
- $/M in
- —
- $/M out
- —
- context
- 1M
- weights
- open
- $/M in
- $0.3
- $/M out
- $1.2
What actually differs
- Context window
- Identical — both accept 1M tokens, so context length is not a reason to pick either.
- Weights
- LongCat-2.0 publishes weights (MIT (commercially permissive)); Kimi K2.8 Preview is API-only. That decides self-hosting, air-gapped deployment and fine-tuning before any capability question does.
- Recency
- Kimi K2.8 Preview shipped 73 days after LongCat-2.0 (2026-09-11 vs 2026-06-30).
Full spec
| Attribute | Kimi K2.8 Preview | LongCat-2.0 |
|---|---|---|
| Developer | Moonshot AI | Meituan |
| Released | 2026-09-11 | 2026-06-30 |
| Context window | 1,000,000 | 1 million tokens (LongCat Sparse Attention / LSA) |
| Pricing | not recorded | $0.30/M input · $1.20/M output ($0.006/M cached input) — OpenRouter catalogue, read 2026-07-28. Open weights, so this is hosted-inference pricing rather than a licence fee. |
| License | proprietary | MIT (commercially permissive) |
| Availability | Kimi API platform, Kimi Code, Kimi Work | Open-sourced 2026-06-30; previously served on OpenRouter under the codename "Owl Alpha" |