Jascha Achterberg

Co-Founder at @CallosumAI & Fellow of @StJohnsOx @UniofOxford. Working on understanding intelligent systems in neuroscience & building them in computing and AI.

[Jascha Achterberg @achterbrain]

We are at a unique moment in time for AI & compute: New accelerators / chips, HPC hardware, and new algorithms have each made strides, but we are not yet orchestrating them as a heterogeneous stack. That is what @CallosumAI is built to do, and today we are sharing our vision 🧵

[Callosum @CallosumAI]

Today we launched @CallosumAI.

We are building the infrastructure where heterogeneous chips & intelligence co-evolve to solve the world's hardest problems.

Today we present our first results.

Across four large problem spaces, we break SOTA and deliver orders-of-magnitude improvements in capabilities, cost and speed: 12× cheaper deep context. New web SOTA with open-source, 3x cheaper and faster. 2.4× cache speedups. 1,767× faster tool calling. This is the worst our infrastructure will ever be.

We do it by co-evolving heterogeneous chips and multi-agent intelligence - workflows aware of their hardware, models aware of their task graph, kernels aware of their output constraints. An Intelligent System.
https://t.co/t0KiP6q3eJ

[Ian Hogarth @soundboy]

1/ I'm really excited to share that Plural is leading @Orbital_Ind's $50m Series B round

Orbital is using AI to discover and design novel compounds from the atoms up, then engineering the products that exploit them directly.

[Matt Clifford @matthewclifford]

Incredible opportunity to join one of the most exciting companies in London

[Callosum @CallosumAI]

Join us!

[Danyal Akarca @DanAkarca]

@CallosumAI is hiring in London!

We're building the infrastructure for heterogeneous compute - making many models, on many chips, behave as a single coherent, co-evolving system.

Five MTS roles open across the AI infra stack. Link below!

[Jim Halpert Argento @sapillopillo]

capitulos nuevos de the office hechos con IA antes que gta 6, desaparezcan el mundo

[Matt Clifford @matthewclifford]

Really enjoyed recording this with @FinnMurphy12 and @soundboy and fanning the flames of British optimism!

[James Wise @Jameswise]

Start here. Scale here. Win Everywhere.

[Seb Johnson @SebJohnsonUK]

Tomorrow the @UKSovereignAI fund launches with £500m to back the best of British tech.

The AI economy is growing 23x faster than the UK economy in general.

This initiative guarantees that the public gets to benefit from the explosive growth of the AI sector.

LETS GO

[Ryota Kanai @kanair]

Great to see this on X. This is something I created during my PhD time 20 years ago.

[James Wise @Jameswise]

It’s obviously a shame that OpenAI have paused some of their data centre investment here in the UK, and high energy prices need to be tackled for everybody - from household bills to heavy industry and AI.

But the UK, as is this case with many other countries, is not the natural home for many gigafactory-scale DCs aimed at huge training runs. While we must have this capacity to some degree ( and you can apply now to SovAI’s AIRR compute programme to access it! ), DCs of Stargate size are probably best suited to cold countries or areas with extremely cheap domestic energy supply, and perhaps one day space.

What the UK must do is be the best place for companies in areas of AI where we have abundant strengths to start and scale - novel chips, heterogenous compute systems, edge inference, photonics, new model architectures, frontier models in biology, chemistry, physical sciences, voice, embodied AI, advanced engineering in robotics, agent security. The list goes on.

I hope the companies building in those sectors get the same press coverage for each of their technical breakthroughs & commercial milestones as this OpenAI story has got!

[Leo Kozachkov @Leokoz8]

Dynamical systems theory, energy-based models, and transformers: what could be better? Check out our new #ICLR2026 paper and a great writeup from @DimaKrotov!

[Andrew Bennett @andrewjb_]

interesting extrapolation from @bratton @blaiseaguera @profjamesevans on what 'societies of thought' (vs chains of thought) mean for agentic AI & an intelligence explosion

[Sean Escola @SeanEscola]

We know about cosmological dark matter despite being unable to measure it because, without it, galaxies would fall apart. By analogy, let's talk about "cognitive dark matter" (CDM): brain functions that meaningfully shape behavior but are hard to infer from behavior alone.

New paper! 🧵👇

[Claire Bedbrook @clairebedbrook]

Aging may feel gradual… but what if it’s not?
In our paper out today, we tracked fish continuously from puberty until death.
This gave us a unique view of how aging unfolds across the adult lifespan.
🧵

[Andrew Davison @AjdDavison]

I'm not sure about the details but I'm convinced that how to publish and create impact is due to change very significantly in the near future. The value of writing and reading 8 page PDFs is rapidly dropping. What is the right way to publish the nugget of a research contribution?

[Andrew Hart @AndrewHart]

The UK gov just said they're investing £500m in AI startups. And they launched a 🔥 new website which celebrates british innovation, from the first algorithm to AlphaFold.

[Jascha Achterberg @achterbrain]

@rajathx I don’t think the room is equipped for that but I will get back to you here if I hear there are recordings!

[Jascha Achterberg @achterbrain]

Going to Cosyne? There will be a "Biologically-inspired Artificial Intelligence: Challenges and Opportunities" workshop on Monday 16th! 🧠

Exciting lineup of speakers alongside the opportunity to present your NeuroAI poster, more info on program & poster signup in thread below!

[Jascha Achterberg @achterbrain]

Super looking forward to the workshop! Alongside the talks and poster session, we are also working on an industry careers in NeuroAI meet-up for Early Career Researchers.

All details and updates can be found on our website: https://t.co/GT9nupXIw9

[Jascha Achterberg @achterbrain]

We are also hosting a NeuroAI poster session during the lunch break! If you are presenting a NeuroAI-related poster at Cosyne, you are welcome to put it up in our workshop room so attendees can find relevant work they might otherwise have missed.
Signup: https://t.co/FXzo5plt48