Anthropic

Claude Fable 5

Claude Fable 5 is Anthropic's most capable widely released model for demanding reasoning, long-horizon agentic work, code, and multimodal tasks. It features a 1M token context window, 128K max output tokens, always-on adaptive thinking, function calling, structured outputs, and vision support.

claude-fable-5

Pricing

~92%

Input: $0.831002 / 1,000,000 tokens
Output: $4.15501 / 1,000,000 tokens
Cache read: $0.0831 / 1,000,000 tokens
Cache write: $1.038753 / 1,000,000 tokens

How pricing works

Discount history

91.7%Nov 8, 03:56 AM UTC

Nov 7, 11:57 PMNov 8, 03:56 AM UTC

Model details

Input: text, image
Output: text
Context window: 1,000,000 tokens
Maximum output: 128,000 tokens
Availability: $9.2KUncapped capacity
Updated: 11/8/2026, 3:58:06 AM UTC

Capacity is reserved when your request is accepted.

Capabilities

ChatStreamingTool callingVisionReasoningJSON modeWeb search

Supported parameters

include_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_ktop_pverbosity