llm-jp/llm-jp-3-1-8x13b-instruct4

LLM-jp-3.1 8x13B instruct4

LLM-jp-3.1 8x13B instruct4 is a Japanese-specialized open Mixture-of-Experts model from Japan's National Institute of Informatics (NII), with 73B total and 22B active parameters. It is strongest on Japanese-language tasks — topping the humanities category and exceeding GPT-4-0613 on Japanese evaluations — while lagging frontier models on coding and math.

3/21/2026

4,096 tokens

Input: ¥16/M

Output: ¥79/M

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Code Examples

curl https://api.fastmetal.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "llm-jp-3.1-8x13b-instruct4",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'