Writer: Palmyra X4 (US)
Palmyra X4 (US) is a reasoning model from Writer released on Oct 9, 2024. It reads text and writes text, with a 123K token context window and up to 8K tokens per reply.
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It costs $2.50 per million input tokens and $10 per million output tokens.
It supports tool calling.
2 providers serve it, including Amazon Bedrock and Merge Gateway.
- Modalities
- In / out price
- $2.50 / $10 per 1M
- Context
- 123K
- Max output
- 8K
- Released
- Oct 9, 2024
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Palmyra X4 (US) pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $2.50 / 1M tokens | |
|---|---|---|
| Output | $10 / 1M tokens |
Palmyra X4 (US) providers
2 providers serve it, including Amazon Bedrock and Merge Gateway. Each host sets its own price and limits, so the cheapest one is not always the one with the longest context.
| Provider | Input /M | Output /M | Cache read /M | Context | Max output |
|---|---|---|---|---|---|
| Amazon Bedrock | $2.50 | $10 | – | 123K | 8K |
| Merge Gateway | $2.50 | $10 | – | 128K | 32K |
What Palmyra X4 (US) costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Palmyra X4 (US) through an OpenAI compatible API.
- Tools
tools - Reasoning
reasoning - Temperature
temperature
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Palmyra X4 (US) questions
How much does the Palmyra X4 (US) API cost?
$2.50 per million input tokens and $10 per million output tokens. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Palmyra X4 (US)?
122,880 tokens of input, and it can write up to 8,192 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Which providers serve Palmyra X4 (US)?
2 providers serve it, including Amazon Bedrock and Merge Gateway. Prices differ by host, so the Providers table on this page lists each one with its input and output price.
Does Palmyra X4 (US) support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is Palmyra X4 (US) open source?
No. Writer serves it through an API only, so you cannot download the weights or host it yourself.
When was Palmyra X4 (US) released?
Oct 9, 2024.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.