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PrismML releases Ternary Bonsai 2 27B, 9x compressed model retaining 98% performance

PrismML releases Ternary Bonsai 2 27B model

1 Sep 17 5:13 PM · 8d ago · 2 articles · 1 post · 2 sources · development 1 of 4

PrismML announced Ternary Bonsai 2 27B, a quantized 27B-parameter model using ternary {−1, 0, +1} weights with FP16 group-wise scaling. The model achieves a 5.9GB footprint (1.76 effective bits per weight), more than 9x smaller than full-precision Qwen3.8 27B, while retaining 98.2% of aggregate benchmark performance across reasoning, math, coding, vision, and agentic tool use.

PrismML releases Ternary Bonsai 2 27B model
prismml.com

“Against its full-precision counterpart, Ternary Bonsai 2 27B is more than 9x smaller while retaining 98.2% of aggregate benchmark performance.”

PrismML

PrismML Model developer and publisherAurornis Community tester

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Peak 8 pieces in two hours at Sep 17, 4 PM; 50 pieces over 9 days (5 articles · 3 posts · 42 comments) Sep 17, 4 PM — 8 pieces · 3 articles · 1 post · 4 comments — Hacker News 5, Newswires 3Sep 17, 6 PM — 6 pieces · 6 comments — Hacker News 6Sep 17, 8 PM — 5 pieces · 1 post · 4 comments — Hacker News 4, Mastodon 1Sep 17, 10 PM — 5 pieces · 2 articles · 3 comments — Hacker News 3, Newswires 2Sep 18, 12 AM — quietSep 18, 2 AM — 4 pieces · 1 post · 3 comments — Hacker News 2, Lobsters 2Sep 18, 4 AM — 3 pieces · 3 comments — Hacker News 3Sep 18, 6 AM — 1 piece · 1 comment — Lobsters 1Sep 18, 8 AM — 3 pieces · 3 comments — Hacker News 3Sep 18, 10 AM — 2 pieces · 2 comments — Hacker News 1, Lobsters 1Sep 18, 12 PM — quietSep 18, 2 PM — 2 pieces · 2 comments — Lobsters 1, Hacker News 1Sep 18, 4 PM — 2 pieces · 2 comments — Lobsters 2Sep 18, 6 PM — quietSep 18, 8 PM — quietSep 18, 10 PM — 2 pieces · 2 comments — Lobsters 2Sep 19, 12 AM — 2 pieces · 2 comments — Lobsters 2Sep 19, 2 AM — 3 pieces · 3 comments — Lobsters 2, Hacker News 1Sep 19, 4 AM — quietSep 19, 6 AM — quietSep 19, 8 AM — quietSep 19, 10 AM — quietSep 19, 12 PM — 1 piece · 1 comment — Lobsters 1Sep 19, 2 PM — quietSep 19, 4 PM — 1 piece · 1 comment — Hacker News 1Sep 19, 6 PM — quietSep 19, 8 PM — quietSep 19, 10 PM — quietSep 20, 12 AM — quietSep 20, 2 AM — quietSep 20, 4 AM — quietSep 20, 6 AM — quietSep 20, 8 AM — quietSep 20, 10 AM — quietSep 20, 12 PM — quietSep 20, 2 PM — quietSep 20, 4 PM — quietSep 20, 6 PM — quietSep 20, 8 PM — quietSep 20, 10 PM — quietSep 21, 12 AM — quietSep 21, 2 AM — quietSep 21, 4 AM — quietSep 21, 6 AM — quietSep 21, 8 AM — quietSep 21, 10 AM — quietSep 21, 12 PM — quietSep 21, 2 PM — quietSep 21, 4 PM — quietSep 21, 6 PM — quietSep 21, 8 PM — quietSep 21, 10 PM — quietSep 22, 12 AM — quietSep 22, 2 AM — quietSep 22, 4 AM — quietSep 22, 6 AM — quietSep 22, 8 AM — quietSep 22, 10 AM — quietSep 22, 12 PM — quietSep 22, 2 PM — quietSep 22, 4 PM — quietSep 22, 6 PM — quietSep 22, 8 PM — quietSep 22, 10 PM — quietSep 23, 12 AM — quietSep 23, 2 AM — quietSep 23, 4 AM — quietSep 23, 6 AM — quietSep 23, 8 AM — quietSep 23, 10 AM — quietSep 23, 12 PM — quietSep 23, 2 PM — quietSep 23, 4 PM — quietSep 23, 6 PM — quietSep 23, 8 PM — quietSep 23, 10 PM — quietSep 24, 12 AM — quietSep 24, 2 AM — quietSep 24, 4 AM — quietSep 24, 6 AM — quietSep 24, 8 AM — quietSep 24, 10 AM — quietSep 24, 12 PM — quietSep 24, 2 PM — quietSep 24, 4 PM — quietSep 24, 6 PM — quietSep 24, 8 PM — quietSep 24, 10 PM — quietYesterday, 12 AM — quietYesterday, 2 AM — quietYesterday, 4 AM — quietYesterday, 6 AM — quietYesterday, 8 AM — quietYesterday, 10 AM — quietYesterday, 12 PM — quietYesterday, 2 PM — quietYesterday, 4 PM — quietYesterday, 6 PM — quietYesterday, 8 PM — quietYesterday, 10 PM — quietToday, 12 AM — quietToday, 2 AM — quietToday, 4 AM — quietToday, 6 AM — quietToday, 8 AM — quietToday, 10 AM — quietToday, 12 PM — quietToday, 2 PM — quiet 1–4
1–4PrismML releases Ternary Bonsai 2 27B…
Sep 18Sep 19Sep 20Sep 21Sep 22Sep 23Sep 24yesterdaynow · 4:29 PM ET

What was reported 1 claim about this development

  1. 5 outlets Bonsai 2 27B: Near-Lossless Compression in a 9x Smaller Footprint

    first by Lobsters, 8d ago · also PrismML News, Simon Willison, HN Best, HN Frontpage

    1 more headline

What people said 1 voice · verbatim

All 4 developments of PrismML releases Ternary Bonsai 2 27B, 9x compressed model… →

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