$ diff k2-horizon longcat-2-0
K2 Horizon vs LongCat-2.0
Values come from K2 Horizon 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.
IfmK2 Horizon
- context
- 524K
- weights
- open
- $/M in
- —
- $/M out
- —
- context
- 1M
- weights
- open
- $/M in
- $0.3
- $/M out
- $1.2
What actually differs
- Context window
- LongCat-2.0 takes 1M against 524K — modestly more room in a single request.
- Weights
- Both publish weights — K2 Horizon under Apache 2.0 (weights and code), LongCat-2.0 under MIT (commercially permissive). Check the licences rather than assuming they permit the same commercial use.
- Recency
- K2 Horizon shipped 65 days after LongCat-2.0 (2026-09-03 vs 2026-06-30).
Full spec
| Attribute | K2 Horizon | LongCat-2.0 |
|---|---|---|
| Developer | Ifm | Meituan |
| Released | 2026-09-03 | 2026-06-30 |
| Context window | 524,288 (flagship 375B-A23B, native from midtraining onward) | 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 | Apache 2.0 (weights and code) | MIT (commercially permissive) |
| Availability | Hugging Face (weights, code, checkpoints, training data where redistributable) | Open-sourced 2026-06-30; previously served on OpenRouter under the codename "Owl Alpha" |