K2 Horizon 375B A23B
Active Parameters
375B
Context Length
524K
Modality
Text
Architecture
Mixture of Experts
KV Cache Rate
244 KB/tok
License
Apache 2.0
Release Date
1 Sept 2026
Knowledge Cutoff
-
API Pricing (per 1M)
Input: $0.00 · Output: $0.00
Hardware Sizing
Precision
Context
Workload Memory: 745.74 GB
FP16 · 8K context
Base Weights: 741.33 GB
KV Cache: 1.91 GB
Runtime & Graphs: 2.50 GB
Minimum Required Hardware
8x NVIDIA H200 141GB
745.7 / 1015.2 GB usable · TP 8
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Architecture Diagram
Evaluation Benchmarks
Rank
#73
| Benchmark | Score | Rank |
|---|---|---|
Agentic Index | 0.40 | 41 |
Coding Index | 0.61 | 65 |
Intelligence Index | 0.18 | 186 |
Rankings
Overall Rank
#73
Coding Rank
#55
About K2 Horizon 375B A23B
K2 Horizon 375B A23B is a massive Mixture-of-Experts language model activating 23B parameters per token. It is built for demanding reasoning, advanced code synthesis, and deep multi-turn conversational agents.
Technical Specifications
Attention
Attention Structure
Grouped-Query Attention
Attention Heads
48
Key-Value Heads
8
Attention Head Dimension
128
Position Embedding
ROPE
RoPE Theta
10,000,000
Normalization
RMS Normalization
Activation Function
SwigLU
Dimensions
Hidden Dimension Size
6,144
Number of Layers
61
FFN Intermediate Size (Dense)
16,384
Tokenizer
Vocabulary Size
250,624
Mixture of Experts
Total Expert Parameters
23.0B
Number of Experts
192
Active Experts
8
Shared Experts
1
FFN Intermediate Size (per Expert)
1,792
Resources
About Kimi K2
Moonshot AI's Kimi K2 is a Mixture-of-Experts model featuring one trillion total parameters, activating 32 billion per token. Designed for agentic intelligence, it utilizes a sparse architecture with 384 experts and the MuonClip optimizer for training stability, supporting a 128K token context window.