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TechQuiet 2d · day 4

Apple's A20 Pro doubles on-device AI speed on 27B model in iPhone 18 Pro test

A hands-on demo shows the new chip running a 27-billion-parameter model twice as fast as the iPhone 17 Pro's A19 Pro.

newest coverage 2d agosummary written 2d ago7 pieces208 likes & upvotes4 comments MastodonGoogle NewsXNewswires

What to know

  • A demo shows the iPhone 18 Pro's A20 Pro chip running a 27-billion-parameter model (Bonsai 27B) at double the speed of the iPhone 17 Pro's A19 Pro.
  • The gain is attributed to a new dual-16-core Neural Engine and faster 12GB 96-bit LPDDR5X memory (115.2GB/s bandwidth) in the iPhone 18 Pro line.
  • Trade-offs remain: the newer, denser Bonsai 2 model (2-bit quantization) is still too large to run on-device on the iPhone 18 Pro.
  • The result is a third-party demonstration, not an official Apple benchmark, and circulated widely after being picked up on social media.

Apple Chipmaker/device makerAdrien Grondin Independent tester/developer@0x0SojalSec Social media commentator

Apple's A20 Pro doubles on-device AI speed on 27B model in iPhone 18 Pro test
x.com

How it unfolded 2 developments, newest first · click a bar or a number to jump articlesposts

Peak 2 pieces in one hour at Sep 20, 5 AM; 7 pieces over 4 days (3 articles · 4 posts) Sep 20, 5 AM — 2 pieces · 2 articles — Google News 2Sep 20, 6 AM — quietSep 20, 7 AM — quietSep 20, 8 AM — quietSep 20, 9 AM — 1 piece · 1 post — Mastodon 1Sep 20, 10 AM — quietSep 20, 11 AM — quietSep 20, 12 PM — quietSep 20, 1 PM — quietSep 20, 2 PM — quietSep 20, 3 PM — quietSep 20, 4 PM — quietSep 20, 5 PM — 1 piece · 1 post — X 1Sep 20, 6 PM — quietSep 20, 7 PM — quietSep 20, 8 PM — quietSep 20, 9 PM — quietSep 20, 10 PM — quietSep 20, 11 PM — quietSep 21, 12 AM — quietSep 21, 1 AM — quietSep 21, 2 AM — quietSep 21, 3 AM — quietSep 21, 4 AM — quietSep 21, 5 AM — quietSep 21, 6 AM — quietSep 21, 7 AM — quietSep 21, 8 AM — quietSep 21, 9 AM — quietSep 21, 10 AM — quietSep 21, 11 AM — quietSep 21, 12 PM — quietSep 21, 1 PM — 2 pieces · 1 article · 1 post — Mastodon 1, Newswires 1Sep 21, 2 PM — quietSep 21, 3 PM — quietSep 21, 4 PM — quietSep 21, 5 PM — quietSep 21, 6 PM — quietSep 21, 7 PM — quietSep 21, 8 PM — quietSep 21, 9 PM — quietSep 21, 10 PM — quietSep 21, 11 PM — quietSep 22, 12 AM — quietSep 22, 1 AM — quietSep 22, 2 AM — quietSep 22, 3 AM — quietSep 22, 4 AM — 1 piece · 1 post — Mastodon 1Sep 22, 5 AM — quietSep 22, 6 AM — quietSep 22, 7 AM — quietSep 22, 8 AM — quietSep 22, 9 AM — quietSep 22, 10 AM — quietSep 22, 11 AM — quietSep 22, 12 PM — quietSep 22, 1 PM — quietSep 22, 2 PM — quietSep 22, 3 PM — quietSep 22, 4 PM — quietSep 22, 5 PM — quietSep 22, 6 PM — quietSep 22, 7 PM — quietSep 22, 8 PM — quietSep 22, 9 PM — quietSep 22, 10 PM — quietSep 22, 11 PM — quietYesterday, 12 AM — quietYesterday, 1 AM — quietYesterday, 2 AM — quietYesterday, 3 AM — quietYesterday, 4 AM — quietYesterday, 5 AM — quietYesterday, 6 AM — quietYesterday, 7 AM — quietYesterday, 8 AM — quietYesterday, 9 AM — quietYesterday, 10 AM — quietYesterday, 11 AM — quietYesterday, 12 PM — quietYesterday, 1 PM — quietYesterday, 2 PM — quietYesterday, 3 PM — quietYesterday, 4 PM — quietYesterday, 5 PM — quietYesterday, 6 PM — quietYesterday, 7 PM — quietYesterday, 8 PM — quietYesterday, 9 PM — quietYesterday, 10 PM — quietYesterday, 11 PM — quietToday, 12 AM — quietToday, 1 AM — quietToday, 2 AM — quietToday, 3 AM — quietToday, 4 AM — quietToday, 5 AM — quietToday, 6 AM — quietToday, 7 AM — quietToday, 8 AM — quietToday, 9 AM — quietToday, 10 AM — quietToday, 11 AM — quiet ◂ 1 earlier2
Sep 21Sep 22yesterdaynow · 12:40 PM ET
  1. 2

    Social media amplifies the A20 Pro benchmark result

    The demonstration spread on X, with commentators highlighting the Neural Engine upgrade as a significant change for on-device AI performance on iPhones.

    “WTF, The iPhone 18 Pro just ran a 27B model locally at twice the speed of the 17 Pro.”
    — @0x0SojalSec
    1. 1 outlet The new iPhone A20 Pro chip benchmark results: Yeah, its very, very fast

      first by Mashable, 2d ago

    • WTF, The iPhone 18 Pro just ran a 27B model locally at twice the speed of the 17 Pro. The A20 Pro chip is at 2× the speed of last year’s Pro. The new Neural Engine changes the equation.

      @0x0SojalSecX3d ago207▲view on X ↗
    2 more of the top 3 · 3 posts in this stretch

    • The new iPhone A20 Pro chip benchmark results: Yeah, it's very, very fast https:// me.mashable.com/tech/76325/the -new-iphone-a20-pro-chip-benchmark-results-yeah-its-very-very-fast?utm_source=flipboard&utm_medium=activitypub Posted into Latest Apple News @ latest-apple-news-thenewsdesk

      tech@flipboard.comMastodon2d ago1▲view on Mastodon ↗

    • The new iPhone A20 Pro chip benchmark results: Yeah, it's very, very fast https:// mashable.com/tech/apple-iphone -a20-pro-chip-benchmark-tests?utm_source=flipboard&utm_medium=activitypub Posted into All the Biggest Apple News in One Place @ all-the-biggest-apple-news-in-one-place-Mashable

      Mashable@flipboard.comMastodon2d agoview on Mastodon ↗
    all of them →
  2. 1

    Demo shows A20 Pro running 27B AI model at 2x A19 Pro speed

    Developer Adrien Grondin ran the Bonsai 27B parameter model locally on an iPhone 18 Pro, showing token-generation speed double that of the iPhone 17 Pro's A19 Pro chip, attributed to the A20 Pro's new dual-16-core Neural Engine and faster 12GB LPDDR5X memory.

    “The iPhone 18 Pro is much better than what I expected for on-device AI It can run a 27B model at double the speed of the 17 Pro The new A20 Pro chip is a beast…”
    — Adrien Grondin
    1. 1 outlet Apple A20 Pro Doubles A19 Pro Speed on 27B AI Model [2026]

      first by shattered.io, 4d ago

      1 more headline
    • lonseidman@indieweb.social

      Apple's new A20 Pro chip can run a 27B parameter model at double the speed of the iPhone 17 Pro’s A19 Pro. - https:// wccftech.com/apple-a20-pro-dem onstrated-run-27b-ai-model-double-speed-a19-pro/

      lonseidman@indieweb.socialMastodon4d agoview on Mastodon ↗

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