Open-Source Semantic LLM Cache PromptCache Cuts Costs by 80% with Sub-Millisecond Latency
tom_doerr · x · 2026-08-11
An open-source project named PromptCache is gaining traction. It is a smart semantic caching proxy written in Go, designed as a drop-in, provider-agnostic solution for high-scale GenAI workloads.
Key Highlights:
- Cost and Latency Reduction: By caching repetitive LLM requests, it claims to cut costs by up to 80% and unlock sub-millisecond responses.
- New Features: The recent v0.4.0 release adds Bearer-token authentication, full streaming (SSE) support including streamed cache hits, a runtime configuration API, and bulk cache warming for pre-populating historical data.
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