---
id: "anthropic/claude-fable-5"
also: ["anthropic/claude-5-fable-20260609", "requesty/anthropic/claude-fable-5", "vercel/anthropic/claude-fable-5"]
card_usd_per_m: "10.0 in, 50.0 out, at anthropic"
cheapest_list_usd_per_m: "10.0 in, 50.0 out, at amazon-bedrock on openrouter"
cheapest_effective_usd_per_m: "1.9284 in, 50.0 out, at anthropic on requesty"
context: 1000000
max_output: 128000
input: ["text", "image", "file"]
output: ["text"]
released: "2026-06-09"
reasoning: ["max", "xhigh", "high", "medium", "low"]
api: ["/api/v1/chat/completions", "/api/v1/completions", "/api/v1/messages", "/api/v1/responses"]
params: ["include_reasoning", "max_completion_tokens", "max_tokens", "reasoning", "reasoning_effort", "response_format", "stop", "structured_outputs", "tool_choice", "tools", "verbosity"]
endpoints: 14
gateways: "openrouter (7), requesty (4), vercel (3)"
no_training: 13
trains: 0
retains_prompts: 13
coding: 76.5000
agentic: 50.7000
---
# Anthropic: Claude Fable 5

Claude Fable 5 is Anthropic's most capable generally available model for autonomous knowledge work and coding. It 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.