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The prompt-caching field guide
Guides and honest comparisons on LLM caching — how prompt caching really works on Anthropic, OpenAI, Gemini and Grok, and how the tools stack up. English only, numbers first.
- Best of·9 min read
Top 7 LLM Caching Tools in 2026 (Compared Honestly)
The 7 best tools for caching LLM API traffic in 2026 — prompt-cache optimizers, AI gateways, and semantic caches — with an honest breakdown of which kind of caching each one actually does.
- Guide·10 min read
What Is Prompt Caching? The Complete Guide to Anthropic, OpenAI, Gemini & Grok Caching
Prompt caching lets AI providers serve repeated prompt prefixes at up to 90% off — if the cache actually gets hit. How prefix caching works on Anthropic, OpenAI, Gemini and Grok, why caches silently miss, and how to fix it.
- Guide·8 min read
How to Reduce LLM API Costs by Up to 90%: A Practical Playbook
Seven proven techniques to cut your OpenAI, Anthropic and Gemini bill — ranked by effort and payoff, with real benchmark numbers. Prompt caching is the biggest lever most teams still leave on the table.
- Guide·7 min read
Prompt Caching vs Semantic Caching: Which LLM Cache Do You Actually Need?
Semantic caches return a stored answer for similar questions; prompt caching gets you the provider's 90% discount on repeated prefixes. They solve different problems — here's how to choose (or combine) them.
- Guide·9 min read
Anthropic Prompt Caching Tutorial: cache_control, TTLs, and Real Costs
A practical guide to Claude prompt caching: how cache_control breakpoints work, 5-minute vs 1-hour TTL math, write premiums, common mistakes that zero your hit rate, and how to keep the cache warm.
- Comparison·7 min read
Caching.ai vs Helicone: Which One Cuts Your LLM Bill?
Helicone is an excellent LLM observability platform with response caching. Caching.ai optimizes the provider-side prompt cache itself. What each tool does, where they overlap, and when to use which.
- Comparison·7 min read
Caching.ai vs LiteLLM: Gateway Routing vs Cache Economics
LiteLLM unifies 100+ providers behind one API with response caching. Caching.ai maximizes the prompt-cache discount on the providers you already use. A fair comparison — including running both together.
- Comparison·7 min read
Caching.ai vs Portkey: AI Gateway or Prompt-Cache Optimizer?
Portkey is a full-featured AI gateway with simple and semantic response caching. Caching.ai is a focused proxy that keeps your provider prompt cache warm. Feature-by-feature comparison for 2026.
- Comparison·7 min read
Caching.ai vs Cloudflare AI Gateway: Edge Cache or Prompt-Cache Optimizer?
Cloudflare AI Gateway adds edge response caching, logs and rate limits for free. Caching.ai maximizes the provider-side prompt-cache discount. What each covers, what neither does, and when to combine them.
- Comparison·7 min read
Caching.ai vs OpenRouter: Model Marketplace vs Cache Economics
OpenRouter gives you one API key for hundreds of models. Caching.ai makes the prompt-cache discount actually land on the providers you already use. Different jobs — here's how they compare and compose.