Palmyra X4

proprietary

Language model for complex tasks that require extended context

Context
128K
Max output
4K
Input price
$2.5/1M tokens
Output price
$10/1M tokens

Capabilities

Reasoning & Interaction
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming

Details

Model IDpalmyra-x4
Provider Writer
Creator writer
Familypalmyra-x
Licenseproprietary
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightNo
Parameters—
Architecture—
Context window128K tokens
Max input—
Max output4K tokens
Reasoning tokens—
Knowledge cutoff—
Release date
AWS Bedrock IDwriter.palmyra-x4-v1:0
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.writer.com/v1/chat/completions

Pricing

Input
$2.5
Output
$10
Cache write
—
Cache read
—
Batch in
—
Batch out
—

Family Comparison: palmyra-x

ModelContextMax outPricing
Palmyra X51M8K$0.6$6
Palmyra X61M8K$2$8
Palmyra X4128K4K$2.5$10
Palmyra X 003 Instruct32K4K$7.5$22.5

API

GET/v1/models/writer/palmyra-x4

Palmyra X4

palmyra-x4

Language model for complex tasks that require extended context

Changes · 4 entries
palmyra-x4updateca7a400Nov 2, 2026, 03:02 AM
descriptionAdvanced 128k-context model focused on tool calling, RAG,...→Language model for complex tasks that require extended co...
palmyra-x4update20c73acJul 17, 2026, 02:34 AM
descriptionAdvanced language model for complex tasks→Language model for complex tasks that require extended co...
palmyra-x4update80c574aJun 3, 2026, 07:05 AM
descriptionAdvanced 128k-context model focused on tool calling, RAG,...→Advanced language model for complex tasks
palmyra-x4create3e56cf1Apr 26, 2026, 07:23 PM