Prompt Caching: Claude vs GPT vs Gemini Cost Playbook 2026

Prompt caching is a method used by providers like Anthropic, OpenAI, and Google to optimize the cost and efficiency of using language models by storing and reusing static parts of prompts across multiple calls. This process reduces the need to reprocess identical tokens, offering significant cost savings: Anthropic Claude offers a 90% discount on cached reads with explicit markers, OpenAI provides a 50% automatic discount for consistent prefixes, and Google Gemini delivers a 75% discount for large prompts exceeding 32,000 tokens. Each provider has distinct caching strategies, with varying time-to-live settings and discount structures, allowing users to choose based on their specific workload and prompt structure. Effective prompt structuring, such as placing static content as the prefix, enhances caching efficiency and maximizes cost benefits. Eden AI further simplifies the process by routing requests across these providers through a single endpoint, allowing for seamless integration and management of caching strategies.

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