Writer: Palmyra X5
writer/palmyra-x5
Try Palmyra X5 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: "writer/palmyra-x5"
}).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: "writer/palmyra-x5"
}).then(response => {
document.body.innerHTML = response.message.content;
});
</script>
</body>
</html>
Model Card
Palmyra X5 is Writer's most advanced enterprise LLM, featuring a 1-million-token context window and adaptive reasoning capabilities designed for agentic AI workflows.
The model is purpose-built for orchestrating multi-step agents, with sub-second tool-calling latency (~300ms) and the ability to process a full million-token prompt in roughly 22 seconds. It supports code generation, structured outputs, and over 30 languages.
On benchmarks, Palmyra X5 scores 48.7 on BigCodeBench (Full, Instruct), 53% on Longbench v2, and 19.1% on OpenAI's MRCR 8-needle test — close to GPT-4.1's 20.25% on the same evaluation. It's priced at $0.60/M input tokens and $6/M output tokens, positioning it as a cost-efficient alternative for teams building complex, data-heavy agent pipelines at scale.
Context Window 1M
tokens
Max Output 8K
tokens
Input Cost $0.6
per million tokens
Output Cost $6
per million tokens
Input text
modalities
Tool Use No
Release Date Jan 21, 2026
Try Palmyra X5 for free
Try Palmyra X5 instantly in your browser.
This playground uses the Puter.js AI API — no API keys or setup required.
Frequently Asked Questions
You can access Palmyra X5 by Writer 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.
Palmyra X5 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.
Palmyra X5 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 | $0.6 |
| Output | $6 |
Palmyra X5 was created by Writer and released on Jan 21, 2026.
Palmyra X5 supports a context window of 1M tokens. For reference, that is roughly equivalent to 2,080 pages of text.
Palmyra X5 can generate up to 8K tokens in a single response.
Palmyra X5 accepts the following input types: text. It produces: text.
No, Palmyra X5 does not currently support tool use (function calling).
Yes — the Palmyra X5 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 Palmyra X5 to your app for free
Developers can integrate Palmyra X5 for free using the Puter.js AI API.
With the User-Pays Model, each user covers their own AI usage instead of the developer.