Palmyra X5
VerifiedProcesses over a million tokens for extended text tasks.
About Palmyra X5
Palmyra X5 is designed as a text-only LLM with an exceptionally large context capacity. This architecture allows it to ingest and reason over documents that span hundreds of thousands of tokens without truncation. Writer developed the model as a proprietary offering rather than an open-weight release.
Its primary strength lies in maintaining coherence across very long inputs where smaller context windows would fail. The model handles sequential text data efficiently while remaining closed-source with parameters undisclosed. This focus suits workloads that require sustained attention to detail over extended passages.
Typical usage includes analysis of lengthy reports, contract review, and multi-chapter content generation. Organizations integrate it into writing platforms where preserving full document context improves output quality. The model operates exclusively through Writer's managed API endpoints.
Capabilities
How Palmyra X5 compares
Palmyra X5 (striped bar) vs other language models on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Palmyra X5 ranks #73 of 78
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long Document Analysis
Palmyra X5 processes entire lengthy reports, contracts, or research compilations within its 1,040,000-token context to deliver coherent summaries and insights without chunking.
Extended Content Generation
The model maintains narrative consistency when producing or editing book-length manuscripts, technical documentation, or multi-chapter business proposals in one session.
Comprehensive Codebase Review
Palmyra X5 reviews and refactors large software repositories or multi-file projects by retaining full context across thousands of lines of code and dependencies.
Strengths & limitations
Strengths
- +Handles over one million tokens of context
- +Strong for long-form text tasks
- +Enterprise-focused writing capabilities
Limitations
- –Text modality only with no vision support
- –High resource demands for maximum context
- –Subject to typical LLM hallucination risks
Cost calculator
Estimate what Palmyra X5 would cost for your usage.
Based on Palmyra X5's $0.60/1M input · $6.00/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "writer/palmyra-x5",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: writer/palmyra-x5
Editor's verdict
Palmyra X5 is Writer's proprietary language models with a 1040K-token context window.
At $6.00 per 1M output tokens, it is premium-priced for its class.
It is available through Writer's API and aggregators like OpenRouter.
Best suited to handles over one million tokens of context and strong for long-form text tasks.
Frequently asked questions
Palmyra X5 provides a context length of 1,040,000 tokens.
User reviews
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