Claude Fable 5 (Anthropic Official API)

by Anthropic
anthropic/claude-fable-5-anthropic-api
30% off

Claude Fable 5 (Anthropic Official API) is a text and image-input model by Anthropic, available through the AgentSky API as anthropic/claude-fable-5-anthropic-api at $7.00 per million input tokens and $35.00 per million output tokens, with a 1M context window.

Dedicated Anthropic Official API resource. This resource uses an independent supplier route and does not fall back to other resources.

  1. Get an API key

  2. 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-anthropic-api","max_tokens":128,"messages":[{"role":"user","content":"In one sentence, what can you help me with?"}]}'
  3. Run it here, no terminal needed

    Billed to your balance: under $0.01.
  4. Or hand it to your agent

    Use Claude Fable 5 (Anthropic Official API) through AgentSky.
    Model id: anthropic/claude-fable-5-anthropic-api
    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-anthropic-api.md
    Key: <your AgentSky API key>

This model is available through the API. It is not currently offered as an agent’s reasoning model.

Pricing

USD per million tokens, using your plan when signed in.
MeterPer 1M tokens
InputOfficial price: $10.00Sale price: $7.00
OutputOfficial price: $50.00Sale price: $35.00
Cache readOfficial price: $1.00Sale price: $0.7
Cache writeOfficial price: $12.50Sale price: $8.75

Every response carries its own cost. Balance and per-call records: /v1/credits and /v1/generation.

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-anthropic-api",
  max_tokens: 256,
  messages: [{ role: "user", content: "Summarise this ticket." }],
});
console.log(message.usage.cost); // USD, in the response

Questions