Back to Models
LLM-jp
japan-llm-jp-4.1-8b
LLM-jp 4.1 8B
Japan: LLM-jp 4.1 8B Thinking (BF16) - NII's Japanese open reasoning model, hosted and run in Japan
32,768 tokens
Input: $0.0351/M
Output: $0.1721/M
Specifications
Modalities
Input
text
Output
text
Max Output Tokens
8,192Data policy
- Prompt retention
- Unknown: we could not confirm
- Training
- Not used for training
"Unknown" does not mean "safe". It means we could not confirm it.
Whether a provider trains on prompts is a declared value from our terms with them. Retention is determined from the upstream listing for every host this model can reach. Neither is guessed.
Code Examples
curl https://api.fastmetal.ai/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "japan-llm-jp-4.1-8b",
"messages": [{"role": "user", "content": "Hello!"}]
}'Frequently asked questions
- How much does the LLM-jp 4.1 8B API cost?
- On FastMetal, LLM-jp 4.1 8B is billed per token: $0.0351 per 1M input tokens and $0.1721 per 1M output tokens on a US-dollar account, before tax. Usage is drawn from a prepaid balance; there is no subscription or monthly fee.
- Can I call LLM-jp 4.1 8B with the OpenAI SDK?
- Yes. Point base_url at https://api.fastmetal.ai/v1 and pass "japan-llm-jp-4.1-8b" as the model; existing OpenAI-style code works unchanged, including streaming, tool calls and structured output.
- What is the context window of LLM-jp 4.1 8B?
- 32,768 tokens, shared between the prompt and the response.
- What do I need to try LLM-jp 4.1 8B?
- Create an account and add credit; the model is then available both in the browser chat and over the API. There is no contract or minimum spend.
Try LLM-jp 4.1 8B right now
LLM-jp 4.1 8B is available on FastMetal through one API key. Start in the browser, or call it from the OpenAI SDK.