API · Models
Text
Claude Fable 5
Claude Fable 5 is a Mythos-class model with robust safeguards. It can handle long-running, complex, and asynchronous tasks where previous models would have needed more frequent check-ins.
ReasoningToolsexplicit cachingFilesVision
Context 1M·Max out 128K
Quickstart
import { streamText } from 'ai';
import { createOpenAICompatible } from '@ai-sdk/openai-compatible';
const blackbox = createOpenAICompatible({
name: 'blackbox',
apiKey: process.env.BLACKBOX_API_KEY!,
baseURL: 'https://api.blackbox.ai/v1',
});
const result = streamText({
model: blackbox('blackboxai/anthropic/claude-fable-5'),
prompt: 'Why is the sky blue?',
});
for await (const chunk of result.textStream) {
process.stdout.write(chunk);
}Specs & pricing
- Input $/M
- 10
- Output $/M
- 50
- Context window
- 1M
- Max output
- 128K
- Supported parameters
- reasoningtool-useexplicit-cachingfile-inputvision
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|---|---|---|---|
| Claude Opus 4.8 | Text | 1M | 5 |
| Claude Opus 4.7 | Text | 1M | 5 |
| Claude Opus 4.6 | Text | 1M | 5 |
| Claude Sonnet 4.6 | Text | 1M | 3 |
| Claude Sonnet 4.5 | Text | 1M | 3 |