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OpenKey

Palmyra X5

WriterReleased Jan 21, 2026

Palmyra X5 is Writer's most advanced model, purpose-built for building and scaling AI agents across the enterprise. It delivers industry-leading speed and efficiency on context windows up to 1 million...

Try in playground
Context window
1.0M tokens
Max output
8K tokens
Input
text
Output
text
Tokenizer
Other
Released
Jan 21, 2026

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.600$0.018$0.618
Output$6.00$0.180$6.18

Supported parameters

  • max_tokens
  • stop
  • temperature
  • top_k
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model writer/palmyra-x5.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "writer/palmyra-x5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="writer/palmyra-x5",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_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);

Questions

How much does Palmyra X5 cost via API?
Through OpenKey, Palmyra X5 costs $0.618 per 1M input tokens and $6.18 per 1M output tokens. That is the provider price ($0.600 / $6.00) plus a flat 3% fee — nothing else.
What is Palmyra X5's context window?
Palmyra X5 accepts up to 1.0M tokens of context and returns up to 8K tokens per request.
Is Palmyra X5 OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "writer/palmyra-x5" using any OpenAI SDK — only the base URL and API key change.
What inputs does Palmyra X5 support?
Palmyra X5 accepts text input and produces text output.