Count tokens for Claude Fable 5 and estimate API cost before you send a request. Anthropic does not publish this tokenizer, so counts are calibrated estimates for planning.Your text never leaves the browser.
Context window. 1,000,000 tokens (about 750,000 English words).
API pricing. $10.00 input / $50.00 output per 1M tokens.
Tokenizer. Not public; counts on this page are calibrated estimates.
Pricing source.Official Anthropic pricing page, checked 2026-08-11. Prices in the catalog were last refreshed 2026-08-11 and are estimates, not quotes.
Paste your prompt into the counter on this page. Anthropic does not publish the Claude Fable 5 tokenizer, so the count is a calibrated estimate based on text length, language, and structure. Treat it as planning guidance rather than an exact billing number.
How much does Claude Fable 5 cost per token?
Claude Fable 5 costs $10.00 per 1 million input tokens and $50.00 per 1 million output tokens, based on official Anthropic pricing checked 2026-08-11.
What is the context window of Claude Fable 5?
Claude Fable 5 has a context window of 1,000,000 tokens, which is roughly 750,000 English words of combined prompt and response. The counter above shows how much of that window your text consumes.
Is this Claude Fable 5 token count exact?
No. It is a clearly labeled estimate, because Anthropic has not released a public tokenizer for Claude Fable 5. Estimates are usually within a reasonable range for English text but can drift for code, JSON, or non-English languages.