A
Claude Fable 5.1API
Claude Fable 5.1 (Anthropic): live API pricing, context window and the best open-source alternatives, tracked daily by olud.ai.
Prices update automatically — checked daily against provider list prices.
- $20 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 6% of the 226 commercial models tracked here
- 28 of 30 Anthropic models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for Claude Fable 5.1, measured by Artificial Analysis. Higher is better. Measurement mode: Max, Default Fallback.
Models at this level cost $2 per 1M tokens (median of 5) — this one costs $20.
Cheaper and better on this index: Claude Opus 5.5 · Claude Opus 5.5 (batch) · GPT-6 Astra (batch) and 8 more
About this model
Claude Fable 5.1 is a commercial AI model by Anthropic. The specifications below are tracked automatically: pricing is refreshed daily from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is Claude Fable 5.1?
Claude Fable 5.1 is an AI language model from Anthropic. It is a proprietary model, available through an API. It scores 49 on the Artificial Analysis intelligence index.
Is Claude Fable 5.1 free?
Claude Fable 5.1 is not free: it costs $10 per million input tokens and $50 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is Claude Fable 5.1 good at?
Independent benchmarks from Artificial Analysis give it GPQA 93.7%, Humanity's Last Exam 59.1%, Long Context Reasoning 85.3%, SciCode 63.1%, τ-Bench Banking 47.2%, Terminal-Bench 91.4%. It is particularly used for code generation.
How fast is Claude Fable 5.1?
It generates about 66.1 tokens per second, with a median 158.04s delay before the first token. Measured independently by Artificial Analysis.