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Bud Cache · Resource Aware Attention · Semantic Caching

Stop paying to compute the same answer twice.

Production LLM traffic re-asks the same questions in different words — and a string-keyed cache misses every one of them. Bud Cache decides, in under a millisecond on a CPU, whether a genuinely equivalent request has already been answered. Hits return at cache speed. Misses pass through untouched.

Overview

A cache that understands the question.

Bud Cache is the accuracy-first response cache for large language models, built on the same Resource Aware Attention family as Bud Sentinel. It reuses answers only across genuinely equivalent requests — cutting inference cost and latency without serving a wrong answer.

92% decision accuracy 1.5% wrong-answer rate 79% useful hit rate 0.2ms median hit latency

Measured on the sealed CacheBench held-out set (400 pairs); latency on a single commodity CPU core. On the same benchmark, GPTCache 0.1.44 scores 52.6% accuracy with a 68.2% wrong-answer rate.

  • Bud Cache is not a stack layer — it sits in the serving path in front of Bud AI Foundry (Layer 04), and belongs to the Resource Aware Attention family alongside Bud Sentinel; CPU-only, governed by SENTRY on hits and misses alike.
  • The decision: a first request misses, passes through to the model (~1,500ms) and is learned; a genuine paraphrase decomposes into five signals — entities, quantities, constraints, negation, intent — all agree, and the cached answer returns in ~0.2ms; a look-alike with one flipped signal passes through untouched — biased toward caution. 92% decision accuracy, 1.5% wrong-answer rate, 79% useful hit rate on the sealed CacheBench held-out set (400 pairs).
  • Six capabilities: equivalence not similarity; near-zero wrong answers; sub-millisecond CPU-only; a PAC-bounded safety target; self-tuning zero-config; never stale — RFC 9111 native.
  • The result: safety and savings, at once.
Value proposition

Safety or savings becomes safety and savings.

Today's caches make you pick a side: exact-match caches almost never hit, and single-score semantic caches serve confidently wrong answers at production volume. Bud Cache reuses an answer only when five signals agree the request is genuinely equivalent — and when they disagree, it lets the request through. A missed reuse costs one model call; a wrong reuse costs trust.

Decision accuracy92%
Wrong answers1.5%
Useful hit rate79.4%
Median hit latency0.2ms
sealed CacheBench held-out set · single CPU core · methodology in the product brief
Key features

A cache that earns the reuse.

Single-score caches can't tell “looks alike” from “means the same.” These six are why Bud Cache can — and why it never has to choose between accuracy and speed.

01

Equivalence, not similarity

Entities, quantities, constraints, negation, and intent are checked in their own right — an answer is reused only when every signal agrees.

5 signalsone decision · reuse only on agreement
02

Near-zero wrong answers

Coverage is traded away deliberately — 2.4% wrong under adversarial paraphrases, where GPTCache 0.1.44 reaches 96.3% on the same benchmark.

1.5% wrongvs 68.2% for GPTCache · sealed set
03

Sub-millisecond, CPU-only

~285× faster per lookup than GPTCache and ~7,500× faster than a model call — with no GPU anywhere in the cache tier.

0.2ms median≈1ms p99 · single commodity CPU core
04

A safety bound you set

The wrong-answer rate is held under a target you choose — a mathematical PAC bound, not a hopeful threshold. When signals disagree, the request passes through.

5% risk ceilingPAC-bounded · 79% coverage held under it
05

Self-tuning, zero-config

Calibrates to each workload automatically — one Lenient / Balanced / Strict knob, and no ML team required to operate it.

0 thresholds to tuneLenient · Balanced · Strict
06

Never stale by design

RFC 9111 native — time-sensitive questions get short lifetimes and never cross a day boundary, honouring no-store, no-cache, max-age, and min-fresh.

3 TTL scopesper request · per domain · global
Go deeper

The full story, in depth.

Every headline number paired with how it was measured, the full comparison matrix, and the enterprise control list.

Get started with Bud

Put your data on it.

The fastest way to see what an integrated AI operating system does for your enterprise is a proof-of-concept on your infrastructure, with your data.

01 Identify a use case where complexity, cost, or governance is a known pain point.
02 Joint discovery — Bud maps your AI pain points to platform capabilities.
03 POC in days, on your hardware, with your data.