Moonshot AI: Moonshot v1 128K

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Moonshot V1 128K is a long-context text generation model from Moonshot AI, offering a 128,000-token context window. Moonshot AI was one of the first companies to ship native 128K-token context support when the Kimi chatbot launched in 2023.

This variant is designed for tasks that demand large input windows: processing entire codebases, analyzing lengthy legal or financial documents, or maintaining very long conversation histories. It shares the same model quality as the 8K and 32K variants — context length is the only differentiator.

The API is OpenAI-compatible and supports streaming, tool calling, and context caching for reduced latency and cost on repeated prompts.

Context Window 131K

tokens

Max Output 131K

tokens

Input Cost $2

per million tokens

Output Cost $5

per million tokens

Input text

modalities

Tool Use Yes

Release Date Jan 31, 2024

Code Example

Add AI to your app with the Puter.js AI API, no API keys or setup required.

// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';

puter.ai.chat("Explain quantum computing in simple terms").then(response => {
    document.body.innerHTML = response.message.content;
});

<html>
<body>
    <script src="https://js.puter.com/v2/"></script>
    <script>
        puter.ai.chat("Explain quantum computing in simple terms").then(response => {
            document.body.innerHTML = response.message.content;
        });
    </script>
</body>
</html>

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Frequently Asked Questions

How do I use Moonshot v1 128K?

Moonshot v1 128K is no longer available through Puter.js. Explore other AI models for alternatives.

What is the pricing for Moonshot v1 128K?

Moonshot v1 128K costs $2 per 1M input tokens and $5 per 1M output tokens.

	Price per 1M tokens
Input	$2
Output	$5

Who created Moonshot v1 128K?

Moonshot v1 128K was created by Moonshot AI and released on Jan 31, 2024.

What is the context window of Moonshot v1 128K?

Moonshot v1 128K supports a context window of 131K tokens. For reference, that is roughly equivalent to 262 pages of text.

What is the max output length of Moonshot v1 128K?

Moonshot v1 128K can generate up to 131K tokens in a single response.

What types of input can Moonshot v1 128K process?

Moonshot v1 128K accepts the following input types: text. It produces: text.

Does Moonshot v1 128K support tool use (function calling)?

Yes, Moonshot v1 128K supports tool use (function calling), allowing it to interact with external tools, APIs, and data sources as part of its response flow.

Does it work with React / Vue / Vanilla JS / Node / etc.?

Yes — the Moonshot v1 128K API works with any JavaScript framework, Node.js, or plain HTML through Puter.js. Just include the library and start building. See the documentation for more details.

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