Claude Fable 5
Claude Fable 5 is a text and image-input model by Anthropic, available through the AgentSky API as anthropic/claude-fable-5 at $7.00 per million input tokens and $35.00 per million output tokens, with a 1M context window.
A Mythos-class model for demanding reasoning and long-running autonomous work, with always-on adaptive thinking.
Get an API key
Send a request
curl https://gateway.agentsky.dev/v1/messages \ -H "authorization: Bearer $AGENTSKY_API_KEY" \ -H "content-type: application/json" \ -H "anthropic-version: 2023-06-01" \ -d '{"model":"anthropic/claude-fable-5","max_tokens":128,"messages":[{"role":"user","content":"In one sentence, what can you help me with?"}]}'Run it here, no terminal needed
Or hand it to your agent
Use Claude Fable 5 through AgentSky. Model id: anthropic/claude-fable-5 OpenAI-compatible base URL: https://gateway.agentsky.dev/v1 · Anthropic base URL: https://gateway.agentsky.dev Docs: https://agentsky.dev/models/anthropic/claude-fable-5.md Key: <your AgentSky API key>
Pricing
USD per million tokens, using your plan when signed in.
| Meter | Per 1M tokens |
|---|---|
| Input | |
| Output | |
| Cache read | |
| Cache write |
Use it
Point your client at the gateway and pass this model id. Nothing else changes.
import Anthropic from "@anthropic-ai/sdk";
const client = new Anthropic({
baseURL: "https://gateway.agentsky.dev",
apiKey: process.env.AGENTSKY_API_KEY, // ast_…
});
const message = await client.messages.create({
model: "anthropic/claude-fable-5",
max_tokens: 256,
messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(message.usage.cost); // USD, in the response