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Claude Fable 5API
Claude Fable 5 (Anthropic): live API pricing, context window and the best open-source alternatives, tracked daily by OpenSourceAI.tech.
Prices update automatically — checked hourly against provider list prices.
Benchmarks & performance
Independent benchmark scores for Claude Fable 5, measured by Artificial Analysis. Higher is better. Measurement mode: Adaptive Reasoning, Max Effort, Opus 4.8 Fallback.
About this model
Claude Fable 5 is a commercial AI model by Anthropic. The specifications below are tracked automatically: pricing is refreshed hourly 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?
Claude Fable 5 is an AI language model from Anthropic. It is a proprietary model, available through an API. It scores 59.9 on the Artificial Analysis intelligence index.
Is Claude Fable 5 free?
Claude Fable 5 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 good at?
Independent benchmarks from Artificial Analysis give it GPQA 92.6%, Humanity's Last Exam 53.3%, Long Context Reasoning 70%, SciCode 60.2%, IFBench 63.5%, τ²-Bench 98.5%, τ-Bench Banking 26.8%, Terminal-Bench 84.6%, Terminal-Bench Hard 62.9%. It is particularly used for code generation.
How fast is Claude Fable 5?
It generates about 68.2 tokens per second, with a median 60.35s delay before the first token. Measured independently by Artificial Analysis.
Open-source alternatives
Depending on your workload, an open-weight model that you can self-host may cut costs dramatically or remove per-token pricing entirely. Our comparison pages put this model side by side with the strongest open-source contenders.