---
title: "Comment by Mihai_LeanZero on \"Apple Silicon vs cloud APIs in 2026: the local LLM break-even, with real benchmarks\" | Hashnode"
description: "The prefill-vs-generation split is the part most of these comparisons skip, and agent loops make it worse than a single chat prompt would suggest. A loop that r"
url: "https://hashnode.com/posts/apple-silicon-vs-cloud-apis-in-2026-the-local-llm-break-even-with-real-benchmarks/6a70e44cb263fead21e5e954/comment/6abc00292ea2655292bbaffd"
---

[Discussion](https://hashnode.com/posts/apple-silicon-vs-cloud-apis-in-2026-the-local-llm-break-even-with-real-benchmarks/6a70e44cb263fead21e5e954)

Comment [Apple Silicon vs cloud APIs in 2026: the local LLM break-even, with real benchmarks](https://hashnode.com/posts/apple-silicon-vs-cloud-apis-in-2026-the-local-llm-break-even-with-real-benchmarks/6a70e44cb263fead21e5e954)

[Mihai\_LeanZero](https://hashnode.com/@mihaileanzero)

[Sep 29](https://hashnode.com/posts/apple-silicon-vs-cloud-apis-in-2026-the-local-llm-break-even-with-real-benchmarks/6a70e44cb263fead21e5e954/comment/6abc00292ea2655292bbaffd)

The prefill-vs-generation split is the part most of these comparisons skip, and agent loops make it worse than a single chat prompt would suggest. A loop that resends a growing transcript every turn is prefill-dominated by construction, so the local machine's disadvantage compounds turn over turn instead of staying fixed. One thing the break-even table doesn't account for: prompt caching on the hosted side. Anthropic (and most frontier providers now) discount cached input tokens heavily, so a long, mostly-repeated agent transcript costs a lot less on the API than the raw per-million-token rate implies -- which pushes the break-even point further out than the $5/million-input math suggests on its own. Local inference doesn't get that discount for free either, you'd need your own KV-cache reuse across turns to close the gap, and llama.cpp's prompt caching only helps when the prefix is byte-identical between calls, which an evolving agent transcript usually isn't.