Back to models
Anthropic
Claude Fable 5
proprietaryReleased Jun 9, 2026
Anthropic's first publicly available Mythos-class model, exceeding the capabilities of any model the company has previously made generally available. State-of-the-art on nearly all tested benchmarks, with exceptional performance in software engineering, knowledge work, vision, and scientific research. Its lead grows on longer and more complex tasks. Ships with built-in safeguards that route sensitive cybersecurity, biology, chemistry, and distillation queries to Claude Opus 4.8.
ChatText completionFunction callingVisionCode generationReasoningtext · image · code
Provider (1)
Sorted by total cost (input + output per 1M tokens). Select a row to view provider details.
| Provider | Pricing (per 1M) | Rate limits | Regions | Health | Latency |
|---|---|---|---|---|---|
| In: $15.00Out: $75.00 | 50 RPM / 80K TPM | us-east-1eu-west-1 | Healthy | 0ms |
Quick start
Use this model via Anthropic with an OpenAI-compatible SDK.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://api.anthropic.com/v1",
apiKey: process.env.ANTHROPIC_API_KEY,
});
const response = await client.chat.completions.create({
model: "claude-fable-5-20260609",
messages: [
{ role: "user", content: "Hello!" }
],
});
console.log(response.choices[0].message.content);Using Anthropic API · OpenAI-compatible SDK