Fable 5.5 pricing status and reference rates
Anthropic’s base API price table lists Fable 5.1 at $10 for input and $50 for output, per million tokens. Opus 5.5 is listed at $4 for input and $20 for output, on the same unit basis.
These are reference rates for the named models. We do not assign either rate to Fable 5.5, and a missing Fable 5.5 price does not mean the model is free.
How to calculate input and output token costs
The calculator adds input tokens multiplied by the input rate and output tokens multiplied by the output rate, then divides each by one million. Keep the input and output counts separate: equal counts can have very different costs.
For an illustrative workload of one million input tokens and 200,000 output tokens, the documented base rates give $20 for Fable 5.1 or $8 for Opus 5.5. This is arithmetic for that workload, not a claim about how many tokens either model would actually use.
Planning for an unknown price
Choose a custom scenario when you want to explore a budget before rates are known. Enter both rates yourself. The result remains a hypothetical scenario even if you type a number that looks plausible.
Start with a budget ceiling and a workload you can describe, then try several rates. This shows how sensitive your budget is to price changes without pretending to predict a launch price. No Fable 5.5 rate is prefilled.
A base-token estimate is not a full bill
The official pricing guide treats prompt caching, batch processing, fast mode and inference geography separately. Partner billing can also differ. The calculator covers only standard input and output token charges, with no taxes or additional service charges.
A Claude subscription and API token pricing also answer different questions. Check the relevant plan’s included usage and credits before using a token estimate to decide what a subscription covers.