$ diff k2-horizon hy4-preview
K2 Horizon vs Hy4 preview
Values come from K2 Horizon and Hy4 preview, 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
- $0.834
- $/M out
- $2.501
What actually differs
- Context window
- Hy4 preview takes 1M against 524K — modestly more room in a single request.
- Weights
- Both publish weights — K2 Horizon under Apache 2.0 (weights and code), Hy4 preview under Apache-2.0. Check the licences rather than assuming they permit the same commercial use.
- Recency
- K2 Horizon shipped 6 days after Hy4 preview (2026-09-03 vs 2026-08-28).
Full spec
| Attribute | K2 Horizon | Hy4 preview |
|---|---|---|
| Developer | Ifm | Tencent |
| Released | 2026-09-03 | 2026-08-28 |
| Context window | 524,288 (flagship 375B-A23B, native from midtraining onward) | over 1,000,000 |
| Pricing | not recorded | $0.834/M input · $2.501/M output |
| License | Apache 2.0 (weights and code) | Apache-2.0 |
| Availability | Hugging Face (weights, code, checkpoints, training data where redistributable) | Hugging Face (BF16 + FP8), ModelScope, GitCode, CNB, Tencent Cloud TokenHub, OpenRouter, WorkBuddy, CodeBuddy, Yuanbao, ima |