Palmyra X5
Summary
Palmyra X5 is a proprietary language model from Writer, released on 21 Jan 2026. It accepts text and generates text, with a 1M-token context window and up to 8K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.60 per million input tokens and $6 per million output tokens (Amazon Bedrock), across 2 providers we track.
General-purpose chat model for instruction following, writing, and analysis
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | Writer |
|---|---|
| Release date | 21 Jan 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 1M (1,040,000 tokens) [models.dev] |
| Max output | 8K tokens [models.dev] |
| Input | Text [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | No [models.dev] |
| Tool calling | No [models.dev] |
| Structured output | No [models.dev] |
Palmyra X5 API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| Amazon Bedrock writer.palmyra-x5-v1:0 | $0.60 | $6 | – | 1M | models.dev, 4 Oct 2026 |
| Amazon Bedrock us.writer.palmyra-x5-v1:0 | $0.60 | $6 | – | 1M | models.dev, 4 Oct 2026 |
| OpenRouter writer/palmyra-x5 | $0.60 | $6 | – | 1M | OpenRouter, 4 Oct 2026 |
Frequently asked questions
What is the context window of Palmyra X5?
Palmyra X5 has a context window of 1,040,000 tokens (1M) and can generate up to 8,192 tokens in a single response, according to models.dev.
How much does the Palmyra X5 API cost?
Palmyra X5 is listed from $0.60 per million input tokens and $6 per million output tokens (Amazon Bedrock). Prices last verified 4 Oct 2026.
Is Palmyra X5 open source?
No. Palmyra X5 is a proprietary model; Writer has not released its weights. It is available through APIs including Amazon Bedrock, OpenRouter.
When was Palmyra X5 released?
Writer released Palmyra X5 on 21 Jan 2026, according to models.dev.
Which providers offer Palmyra X5?
We track Palmyra X5 on 2 providers: Amazon Bedrock, OpenRouter.
Change history
No changes detected since we started tracking this model. We re-check every source daily.
Sources
- https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/writer/palmyra-x5.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/writer.palmyra-x5-v1:0.toml
- https://github.com/sst/models.dev/blob/dev/providers/amazon-bedrock/models/us.writer.palmyra-x5-v1:0.toml
- https://openrouter.ai/writer/palmyra-x5