Anthropic: Claude Fable 5.1

Pricing, context window and lifecycle for anthropic/claude-fable-5.1, tracked from what the vendor publishes.

Price per million tokens

Input	$10.00
Output	$50.00
Cache price (read)	$0.250
Cache price (write)	$12.50
Max price	$50.00

Facts

Model ID	anthropic/claude-fable-5.1
Vendor	Anthropic
Token limit (context window)	1,000,000 tokens
Knowledge cutoff	-
End of life	none published

Supported parameters

include_reasoning, max_completion_tokens, max_tokens, reasoning, reasoning_effort, response_format, stop, structured_outputs, tools, verbosity

Other Anthropic models

anthropic/claude-3-haiku $0.250 in / $1.25 out
anthropic/claude-fable-5 $10.00 in / $50.00 out
anthropic/claude-fable-5:batch $5.00 in / $25.00 out
anthropic/claude-haiku-4.5 $1.00 in / $5.00 out
anthropic/claude-haiku-4.5:batch $0.500 in / $2.50 out
anthropic/claude-opus-4 $15.00 in / $75.00 out
anthropic/claude-opus-4.1 $15.00 in / $75.00 out
anthropic/claude-opus-4.1:batch $7.50 in / $37.50 out
anthropic/claude-opus-4.5 $5.00 in / $25.00 out
anthropic/claude-opus-4.5:batch $2.50 in / $12.50 out

Change history

Every change we have observed since tracking began.

Detected	Change	Detail
2026-09-01 19:14	Model Added	Anthropic: Claude Fable 5.1

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