$ diff kimi-k2-8-preview k2-horizon
Kimi K2.8 Preview vs K2 Horizon
Values come from Kimi K2.8 Preview and K2 Horizon, 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
- 524K
- weights
- open
- $/M in
- —
- $/M out
- —
What actually differs
- Context window
- Kimi K2.8 Preview takes 1M against 524K — modestly more room in a single request.
- Weights
- K2 Horizon publishes weights (Apache 2.0 (weights and code)); 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 8 days after K2 Horizon (2026-09-11 vs 2026-09-03).
Full spec
| Attribute | Kimi K2.8 Preview | K2 Horizon |
|---|---|---|
| Developer | Moonshot AI | Ifm |
| Released | 2026-09-11 | 2026-09-03 |
| Context window | 1,000,000 | 524,288 (flagship 375B-A23B, native from midtraining onward) |
| Pricing | not recorded | not recorded |
| License | proprietary | Apache 2.0 (weights and code) |
| Availability | Kimi API platform, Kimi Code, Kimi Work | Hugging Face (weights, code, checkpoints, training data where redistributable) |