Writer

OpenRouter serves 1 Writer model behind one OpenAI-compatible API. Create an OpenRouter API key, point your client at https://openrouter.ai/api/v1, and set the model to an ID such as writer/palmyra-x5. The quickstart has request examples for every supported SDK.

Palmyra X5 has the largest context window of any Writer model on OpenRouter, accepting up to 1,040,000 tokens per request.

Palmyra X5 is the most recently added Writer model on OpenRouter, listed on January 21, 2026.