Osaurus AI

OsaurusAI/Kanana-2-30B-A3B-Instruct-JANG_4M

A Korean-first JANG_4M MLX bundle of Kakao's Kanana-2 30B-A3B Mixture-of-Experts model, tuned to run fast on Apple Silicon via Osaurus.

Converted from kakaocorp/kanana-2-30b-a3b-instruct-2601.

Why this model

Kanana-2 is one of the strongest open Korean LLMs — Kakao trained it with a tokenizer ~30% more efficient on Korean and a 6-language mix (Korean, English, Japanese, Chinese, Thai, Vietnamese). It is a 30.7B-parameter MoE that activates only ~3B parameters per token (top-6 of 128 routed experts + 2 shared), so you get large-model Korean quality at small-model decode speed. JANG_4M compresses it to ~17 GB so it fits comfortably in unified memory on a MacBook.

Bundle

Field Value
Source kakaocorp/kanana-2-30b-a3b-instruct-2601
Architecture deepseek_v3 / DeepseekV3ForCausalLM (MLA attention)
Total / active params 30.7B / ~3B per token
Decoder layers 48 (layer 0 dense, 1–47 MoE)
Hidden size 2048
Experts 128 routed, top-6, + 2 shared (moe_intermediate_size 768)
Attention MLA — kv_lora_rank 512, no query LoRA, qk_nope 128 / qk_rope 64, v_head_dim 128
Context 32,768 tokens
Weight format jang_affine (JANG v2, instant mmap load)
Tier bits attention 8-bit · router/gate fp16 · MoE expert + MLP bulk 4-bit · embed/lm_head bookends high-precision
Average bits/weight 4.26
Shards 32 safetensors
Bundle size ~17 GB
Capabilities text (family deepseek_v3, reasoning qwen3, tools qwen, cache mla)

Quantization policy (JANG_4M)

JANG_4M is a mixed-precision affine scheme designed for MoE: the precision-sensitive pieces stay wide while the redundant expert bulk is compressed.

  • 8-bit affine: self-attention projections (MLA q/kv compression + decompression, o_proj).
  • fp16 passthrough: MoE router/gate weights (routing is extremely precision-sensitive), all RMSNorms.
  • 4-bit affine: routed-expert and dense-MLP gate/up/down projections (the bulk of the weights).
  • High-precision bookends: token embeddings and lm_head.

The per-tensor bit widths are recoverable directly from the weight/scale shapes; jang_config.json is authoritative for the JANG runtime.

Modalities

Modality Status
Text supported
Vision / Audio / Video not present in source — text-only model

Languages

Korean (primary), English, Japanese, Chinese, Thai, Vietnamese.

Reasoning & tools

The source chat template is ChatML-style (<|im_start|>role) with <think>…</think> reasoning and <tool_call>{json}</tool_call> tool calls. The bundle stamps reasoning_parser: qwen3, tool_parser: qwen. Thinking is off by default for the instruct variant; enable it through your runtime's thinking toggle.

Runtime

Built for the Osaurus / vMLX Apple-Silicon runtime. Loading requires a deepseek_v3-aware MLX loader that honors jang_config.json and the bundle's mixed per-tensor bit widths. tokenizer_config.json, generation_config.json, and chat_template.jinja are preserved from the source.

Notes

  • This is a freshly converted bundle. The base model's published Korean benchmarks (e.g. KMMLU) reflect the unquantized weights; JANG_4M-level evaluation for this bundle is pending and will be added here when complete.
  • MTP: the source ships an MTP layer; speculative decoding is not enabled in this bundle (mtp: none for autoregressive decode).

Credits

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Model size
33B params
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