Claude Fable 5.1 API pricing

What it costs on a real workload

Per 1M tokens processed, at the rates above. How the four profiles are defined.

Compare every model on these profiles →

Observed rate history

No repricing observed since this model entered our archive on 2026-09-02. When a rate moves, the change appears here and on the sitewide ticker.

What the record shows

Claude Fable 5.1 has not repriced once since it entered our archive on 2026-09-02. That is the ordinary case rather than the exception: providers ship new models at lower rates far more often than they cut the price of one already in service, which is why a cheaper option usually arrives as a new name rather than as a smaller number on this page.

Against the 40 models we price, it is the 39th cheapest for retrieval-shaped work, which reads a great deal and writes little, and the 39th cheapest for content-shaped work, which does the reverse. The two are close, so it holds its position whichever way your workload leans.

It charges 5.0 times more for output than for input, against a median of 5.0 times across the set. That is close to typical for the models we track.

Cached input reads at $0.250 against a standard input rate of $10.00, a 98% discount on the part of your prompt that repeats.

It accepts image input, but Anthropic publishes no rule for how images become tokens, so we will not price a scanned page on it. That is a gap in the provider's documentation rather than a limit of the model, and it is the reason this model is excluded from image estimates in our estimator instead of being given a plausible figure.

Its 1M token context window holds roughly 750,000 words of English text in a single request. A workload that does not fit cannot run here at any price, which is a capability limit rather than a cost one.

Priced near this one

Closest to Claude Fable 5.1 on a retrieval workload, cheaper and more expensive alike. Cost only; we publish no quality score.

Retrieval profile: 800k in, 200k out, 70% cached where offered.