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AI Tools Kit
AI Tools Kit provides free developer tools for working with AI language models. Built by developers, for developers.
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Cost Optimization
Anthropic Prompt Caching: Cut API Costs by Up to 90%
Anthropic prompt caching charges 10% of the normal input price on cache hits — 90% off. Here's how cache_control works, the break-even math, minimum prefix sizes, and which workloads actually benefit.
Cost Optimization
AI API Pricing 2026: Every Model Compared (GPT-5 vs Claude 4.5 vs Gemini 3)
Side-by-side pricing for 14+ models from OpenAI, Anthropic, Google, and Meta. Includes input/output token costs, context windows, and a cost calculator. Updated February 2026.
Cost Optimization
How to Reduce AI API Costs: 10 Proven Token Optimization Techniques
Practical strategies to minimize your AI API spending without sacrificing output quality. Learn prompt caching, model routing, TOON optimization, and more.