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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.

ReasoningTool UseExplicit CachingFile InputVision (Image)
index.ts
import { streamText } from 'ai'
const result = streamText({
model: 'anthropic/claude-fable-5',
prompt: 'Why is the sky blue?'
})

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Provider
Context
Latency
Throughput
Input
Output
Cache
Web Search
Per Query
Capabilities
ZDR
No Training
Release Date
Anthropic
Legal:Terms
Privacy
1M
5.0s
99tps
$10.00/M$50.00/M
Read:$1/M
Write:
$12.5/M
$10/K
+ input costs
+3
06/09/2026