sakana-namazu
Sakana Namazu is a Japanese-specialized reasoning model from Sakana AI, based on Kimi K2.6 with additional training for Japanese language and business contexts.
Pricing: Input 228 credits / 1M tokens (≈ $1.14), Output 960 credits / 1M tokens (≈ $4.80).
Prices updated
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Sakana Namazu API on ModelFold
Sakana Namazu is a Japanese-specialized reasoning model from Sakana AI, based on Kimi K2.6 with additional training for Japanese language and business contexts. Try Sakana Namazu in the ModelFold Playground, then call it from your own code through an OpenAI-compatible chat completions API.
What Is the Sakana Namazu API
Sakana Namazu at a glance
Sakana Namazu is a chat model from Sakana AI. It accepts text, images and files (such as PDF) as input and returns text, with a context window of up to 262K tokens.
Use it without hosting anything
On ModelFold you call Sakana Namazu with a single API key — no model weights to download and no inference servers to run. The same key also works for the other chat, image, video and audio models on ModelFold.
Core Capabilities of Sakana Namazu
Up to 262K tokens of context
Keep long conversations, large documents and sizeable code in a single request, so the model can reason over the full material instead of fragments.
Understands images and files (such as PDF)
Besides text, Sakana Namazu accepts images and files (such as PDF) as input, so a single request can combine instructions with visual or other media.
Function calling
Sakana Namazu supports tool (function) calling: describe your functions in the request and the model returns structured calls your code can run — the basis for agents and integrations.
Adjustable reasoning effort
Choose a reasoning effort level (low, medium or high) per request to balance depth of thinking against speed and token usage.
Structured outputs
Ask for JSON that follows a schema (response_format), which makes extraction, classification and system integrations more reliable.
How to Use Sakana Namazu on ModelFold
- 1
Step 1: Try it in the Playground
Open the Playground at the top of this page, type a prompt and see how Sakana Namazu responds before writing any code.
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Step 2: Create an API key
Sign in to ModelFold and create an API key in the console. Keep it secret and send it as a Bearer token.
- 3
Step 3: Send a request
Call POST https://modelfold.ai/v1/chat/completions with "model": "sakana-namazu" and your messages. Existing OpenAI-compatible SDKs work by changing the base URL and key.
- ✓
Step 4: Ship and monitor
Integrate the response into your product and check token usage and spend for every call in the console logs.
What You Can Build with Sakana Namazu
Multilingual products
Serve users in many languages with translation, localized support replies and cross-language search.
Enterprise workflows
Automate internal processes such as reporting, knowledge-base Q&A, ticket handling and document review.
Writing and content
Draft, edit and translate articles, emails, product copy and documentation in a consistent tone.
Analysis and complex reasoning
Work through research questions, data interpretation, planning and other problems that need careful step-by-step reasoning.
Frequently Asked Questions
What is Sakana Namazu?⌄
Sakana Namazu is a Japanese-specialized reasoning model from Sakana AI, based on Kimi K2.6 with additional training for Japanese language and business contexts.
Which inputs does Sakana Namazu support?⌄
Sakana Namazu accepts text, images and files (such as PDF) and returns text. Through ModelFold you can send text and images (OpenAI-style image_url content); in the Playground you can also attach documents, which are converted to text.
How long is the context window of Sakana Namazu?⌄
Up to 262K tokens, shared between your input and the model’s output.
Does Sakana Namazu support function calling?⌄
Yes. Sakana Namazu supports tools / function calling through the standard tools parameter of the chat completions API.
How is Sakana Namazu billed on ModelFold?⌄
Pay as you go by tokens: input and output tokens are charged at the per-million-token prices shown on this page. There is no monthly fee, and failed requests are not charged.
How do I call Sakana Namazu through the API?⌄
Send a POST request to https://modelfold.ai/v1/chat/completions with "model": "sakana-namazu", using your ModelFold API key as the Bearer token.
| Input | 228 credits 1M tokens≈ $1.14 |
| Output | 960 credits 1M tokens≈ $4.80 |
Billed per token: input and output are priced separately, and thinking tokens count as output. The Playground charges exactly the same way.
Read API docs →AI Agents · Claude Code / Cursor / Trae →curl https://modelfold.ai/v1/chat/completions \
-H "Authorization: Bearer $MODELFOLD_API_KEY" \
-H "Content-Type: application/json" \
-d '{"model":"sakana-namazu","messages":[{"role":"user","content":"Hello"}]}'