Anthracite: Magnum v4 72B
anthracite-org/magnum-v4-72b
Try Magnum v4 72B for free in your browser, and add it to your app for free with Puter.js AI API.
Try it free Add to your app// npm install @heyputer/puter.js
import { puter } from '@heyputer/puter.js';
puter.ai.chat("Explain quantum computing in simple terms", {
model: "anthracite-org/magnum-v4-72b"
}).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", {
model: "anthracite-org/magnum-v4-72b"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
Magnum v4 72B is a 72-billion parameter creative writing and conversational model developed by Anthracite, fine-tuned on top of Qwen2.5-72B-Instruct. It was specifically trained to replicate the prose quality of Claude 3 Sonnet and Opus, making it one of the most popular open-weight models for narrative generation.
The model excels at creative writing, interactive storytelling, roleplay, and character-driven dialogue. It actively drives narratives forward while maintaining consistent character personas across extended conversations. Multi-language support covers English, French, German, Spanish, Chinese, Japanese, and more.
Magnum v4 72B supports up to 32,768 tokens of context and uses the ChatML prompt format. It's a strong choice for developers building applications where engaging, human-like prose matters more than raw benchmark performance.
Context Window 33K
tokens
Max Output 4K
tokens
Input Cost $2.5
per million tokens
Output Cost $5
per million tokens
Input text
modalities
Tool Use No
Release Date Oct 22, 2024
Try Magnum v4 72B for free
Try Magnum v4 72B instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
Frequently Asked Questions
You can access Magnum v4 72B by Anthracite through Puter.js AI API. Include the library in your web app or Node.js project and start making calls with just a few lines of JavaScript — no backend and no configuration required. You can also use it with Python or cURL via Puter's OpenAI-compatible API.
Magnum v4 72B is free to try with a Puter account. Every account includes a free AI allowance, and you can chat with it in the playground on this page. You can upgrade your account anytime for a larger allowance.
Magnum v4 72B is free to integrate using the Puter.js AI API. With the User-Pays Model, you can add AI to your app for $0, since users cover their own AI usage through their Puter account.
| Price per 1M tokens | |
|---|---|
| Input | $2.5 |
| Output | $5 |
Magnum v4 72B was created by Anthracite and released on Oct 22, 2024.
Magnum v4 72B supports a context window of 33K tokens. For reference, that is roughly equivalent to 66 pages of text.
Magnum v4 72B can generate up to 4K tokens in a single response.
Magnum v4 72B accepts the following input types: text. It produces: text.
No, Magnum v4 72B does not currently support tool use (function calling).
Yes — the Magnum v4 72B 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.
Add Magnum v4 72B to your app for free
Developers can integrate Magnum v4 72B for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.