Dave Lemphers

Australian-made AI |

[Maincode @MaincodeAU]

Today we are open-sourcing Matilda-K3, a 2.8T-parameter frontier model post-trained in Australia with our own conditional post-training. Conditional post-training changes how a model behaves on the requests we target and leaves every other request to the frozen base model, so the changes are precise and the original capability stays intact.

Matilda-K3 is built on Kimi K3, the open-weight model from Kimi (Moonshot AI). The strongest open-weight models today come from a small number of labs, and a model carries the assumptions of the lab that trained it. Our post-training keeps the base model's capability and changes how it behaves in two targeted areas: its identity and its biases. The base weights are frozen and shipped unmodified. Everything else is left unchanged.

It holds its identity under pressure, presenting as Matilda in all 474 held-out adversarial prompts, including jailbreaks, role-play and long-document attacks. On contested political questions, balanced or facts-only answers rose from 9% to 92% and one-sided answers fell from 54% to 3%, with factual accuracy unchanged.

It keeps the full capability of its base: 95.0% on AIME 2025 and 99.4% on HumanEval, both within run-to-run variation of the original model, with a 1M-token context window, native reasoning, and image and video input.

This approach can be applied to shape how a frontier model behaves for a specific organisation, including identity, tone, and policy, without sacrificing its capability.

[Dave Lemphers @davidlem]

@anshuc https://t.co/PcTvI2WpEE

[Dave Lemphers @davidlem]

Australia has the top Jev spot right now @MaincodeAU https://t.co/xbWitGWzcN

[Dave Lemphers @davidlem]

@sydneyrunkle https://t.co/PcTvI2WpEE

[Dave Lemphers @davidlem]

Australia has the top Jev spot right now @MaincodeAU https://t.co/xbWitGWzcN

[Dave Lemphers @davidlem]

Australia has the top Jev spot right now @MaincodeAU https://t.co/xbWitGWzcN

[Dave Lemphers @davidlem]

@CompleteSkeptic https://t.co/xbWitGWzcN Aussie Jev scored 59.26 on Decision Index

[Dave Lemphers @davidlem]

Last week, 263 engineers applied to @maincodehq for AI roles. 38% were PhDs from @CSIRO , @Defencescience, and @ANSTO working on LLMs.

Their reason for leaving?

‘Lack of impactful work.’

All good, we'll take 'em by the truck load!

#hiring #Melbourne #ArtificialIntelligence

[KICK @kick]

Our CTO, Dave, on the public API

[KICK @kick]

KICK is here to stay.

[Santamaria @Svntvmvriv]

The CTO rolling up ya'll! Can't wait for ya to meet him.

[Code Pilot @MyCodePilot]

Bias within the hiring process continues to be a prevalent issue. It is not too late to join us in the fight to eliminate bias from the technical recruiting process! Every graduate deserves an equal chance at employment regardless of their race or gender.

#byebyebias

[Sunny Kim @sunny_newsiee]

Code Pilot is a data science company that aims to help software engineers get hired without the need of a resume, cv or phone interview. Read my @thedailytexan story to find out how! #ArtificialIntelligence
https://t.co/SIoGT0Tn6G

[Dave Lemphers @davidlem]

@MrInvizible @MyCodePilot Awesome!!

[Dave Lemphers @davidlem]

Super excited to announce we'll be launching end of this month, kicking things off in San Francisco. We've gleaned some fascinating insights into the data science behind hiring top engineers using our proprietary coding and behavioral assessments (over 10…https://t.co/9Ym1sk6z2e

[Dave Lemphers @davidlem]

Can hiring science be a thing? We're betting it can and will.  https://t.co/1IKeLTsNDR https://t.co/6tNO1nXb3u

[Dave Lemphers @davidlem]

Char2vec – Character embeddings for word similarity https://t.co/0IeH6uKWNq

[Dave Lemphers @davidlem]

@kengzwl Loved reading https://t.co/ul64qF1506!

[Dave Lemphers @davidlem]

Why Turing would have hated SQL https://t.co/eAaaqswIrE

[Dave Lemphers @davidlem]

For anyone trying to get started with Electron + React + Typescript inside of Docker, hope this helps! …https://t.co/AkZqAiNAms

[Dave Lemphers @davidlem]

@frankarr @Dreejb @murudau Awesome! Let me know how I can help :)