Claude Fable 5 API Pricing

Claude Fable 5 pricing: $10/1M input tokens, $50/1M output tokens, $1/1M cached tokens. Anthropic model cost analysis.

Claude Fable 5 is Anthropic's premium model, best suited for most demanding autonomous tasks, frontier reasoning. It costs $10 per 1M input tokens and $50 per 1M output tokens, with a 1M token context window. At typical usage (10K input tokens, 2K output tokens per call, 1,000 calls per day), Claude Fable 5 costs approximately $6000 per month. With prompt caching enabled at a 90% discount, cached input drops to $1/1M tokens — significant for applications with repeated system prompts. For lower costs, GPT-5.5 (OpenAI) offers input at $5/1M. For higher capability, Claude 3 Opus (Anthropic) costs $15/1M input. Claude Fable 5 is designed for tasks where quality justifies the cost: complex reasoning, nuanced analysis, professional-grade writing, and challenging coding problems. For routine tasks, consider cheaper alternatives in the same provider lineup. On a per-request basis, sending 1,000 input tokens to Claude Fable 5 costs $0.01, and generating 1,000 output tokens costs $0.05. A typical chatbot exchange (500 tokens in, 300 tokens out) runs about $0.02 per message. At scale, small per-request cost differences compound quickly — a model that costs 2x more per token costs 2x more at any volume. All pricing shown here is sourced from Anthropic's official pricing page and verified regularly. LLM providers may change pricing without notice. Always confirm current rates on the provider's website before making purchasing decisions. The cost calculator on this page lets you estimate monthly spending based on your actual token usage and call volume. Anthropic applies standard rate limits to Claude Fable 5 API keys. Check the provider dashboard for your current tier and request higher limits if needed. To get started, create an API key from the Anthropic developer console, install the provider's SDK (anthropic npm package), and make your first API call with a small prompt to verify connectivity and measure actual latency. Most providers offer a free tier or credits for new accounts — use these to benchmark Claude Fable 5 against your specific workload before committing to a paid plan.

FAQ

  • How much does Claude Fable 5 cost per 1M tokens?

    Claude Fable 5 costs $10 per 1M input tokens and $50 per 1M output tokens. Cached input tokens are available at $1 per 1M, a 90% discount.

  • Is Claude Fable 5 cheap or expensive?

    Claude Fable 5 is a premium model at $10/1M input tokens. Use it for tasks where quality justifies the cost.

  • What is the context window of Claude Fable 5?

    Claude Fable 5 supports a context window of 1M tokens. This determines how much text you can send in a single API call — including system prompts, conversation history, and the actual query.

  • Does Claude Fable 5 support prompt caching?

    Yes. Anthropic offers cached input at $1/1M tokens — a 90% discount over the base input price. This helps with repeated system prompts and few-shot examples.

  • How to reduce Claude Fable 5 API costs?

    Three strategies: (1) Enable prompt caching if your provider supports it — savings of up to 90% on repeated input. (2) Route simple queries to cheaper models. (3) Reduce output tokens with concise instructions.

  • How much does one Claude Fable 5 API call cost?

    A typical request with 500 input tokens and 300 output tokens costs approximately $0.02. The exact cost depends on your prompt length and desired response length. Use the cost calculator above to estimate for your specific usage pattern.