Claude Fable 5.1
Description
Claude Fable 5.1 is Anthropic’s most capable generally available model, built for demanding reasoning, coding, and long-running agentic tasks. It offers a 1M-token context window and excels at complex, multi-step work.
At a Glance
Key pricing and model details available for this model.
Input price
$10.00
per 1M tokens
Output price
$50.00
per 1M tokens
Context window
1M
tokens
Hallucination rate
0%
Token Pricing
Token pricing normalized to per-million-token rates.
Input / 1M tokens
$10.00
Output / 1M tokens
$50.00
Cache Read / 1M tokens
$0.25
Cache Write (5m) / 1M tokens
$12.50
Cache Write (1h) / 1M tokens
$20.00
Token Pricing Details
Rates are shown per 1M tokens for easier comparison.
| Input / 1M tokens | $10.00 |
| Input unit | 1M tokens |
| Output / 1M tokens | $50.00 |
| Output unit | 1M tokens |
| Cache Read / 1M tokens | $0.25 |
| Cache Read unit | 1M tokens |
| Cache Write (5m) / 1M tokens | $12.50 |
| Cache Write (1h) / 1M tokens | $20.00 |
Feature Availability
Capabilities explicitly listed in the current payload.
LLM
Available
Vision
Available
Function calling
Available
Reasoning
Available
Service tiers
Not listed
Reasoning Effort Levels
Supported Parameters
Code Samples
Quick start with the Routeway API
import OpenAI from 'openai';
const openai = new OpenAI({
baseURL: "https://api.routeway.ai/v1",
apiKey: "<YOUR_API_KEY>",
});
async function main() {
const completion = await openai.chat.completions.create({
model: "claude-fable-5-1",
messages: [
{
role: "user",
content: "Explain quantum computing in simple terms"
}
]
});
console.log(completion.choices[0].message);
}
main();