The Intelligent Systems Company. Co-evolving chips & intelligence.
Joined February 2026
- Tweets 33
- Following 31
- Followers 1,309
- Likes 56
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Pinned Tweet
Feb 26
The future of compute & AI is heterogeneous.
That future is being built by Callosum.
Today we launch with new breakthroughs made possible by heterogeneity, new scaling principles & a roadmap reimagining compute & AI infrastructure:
callosum.com/blog/introducin…
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Callosum retweeted
Jun 9
At @CallosumAI we are aggressively scaling up hiring, in our London office 🇬🇧
We are building a more pluralistic vision of AI: co-evolving diverse chips and new architectures for the next generation of intelligence, that is economically viable at scale.
We've opened roles across our inference engineering and heterogeneous infra teams. We want the most ambitious & exceptional people to join us.
If you want to do the work of your life, would love to talk! 👇
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May 26
Join us!
May 26
@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!
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Callosum retweeted
Apr 27
Great news that @UKSovereignAI has invested in Ineffable Intelligence, led by David Silver, joining @CallosumAI in the portfolio.
These are the technologies that will define the next decade ( more) of progress.
Congratulations to David and the team!
Apr 27
🇬🇧 Sovereign AI is backing @IneffableLabs 🇬🇧
We can announce Sovereign AI has invested in Ineffable. Led by David Silver, Ineffable is building learning systems that can go beyond the limits of human knowledge, learning continuously to push the frontiers of science and technology.
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Callosum retweeted
Apr 17
Our first investment?
💥 @CallosumAI - @DanAkarca & @achterbrain 💥
Proud to be backing Danyal, Jascha, and the team as they build one of the defining layers of next-gen AI systems. 🔥
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Callosum retweeted
Mar 6
and @CallosumAI has launched in the heart of London with a $10.25m pre-seed world-class team.
We're hiring: callosum.com/join-us
Mar 6
incredibly bullish on the future of tech AI in London.
just to name a few:
• OpenAI just announced (last week) that London will become its largest research hub outside San Francisco
• Anthropic kicked off a 100 person hiring spree across London and Dublin in 2025
• xAI set up shop in London in early 2025, based in X's former Piccadilly office, led by former DeepMind researcher Toby Pohlen
• Microsoft hired 24 researchers from Google DeepMind for its London AI hub
• Google DeepMind announced its first automated research lab in the UK (opening 2026), focused on discovering new materials using AI and robotics
• Perplexity committed £80M to expand London offices
• Groq is opening its first UK data centre in London
• Cursor chose London as its European HQ
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Callosum retweeted
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 🧵
Feb 26
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.
callosum.com/blog/welcome-he…
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Feb 26
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.
callosum.com/blog/welcome-he…
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Feb 26
None of these results came from a bigger model.
12× cheaper deep context. New web SOTA with open-source, 3x cheaper and faster. 2.4× cache speedups. 1,767× faster tool calling.
All from heterogeneity - mixed models, mixed chips, mixed scales - co-evolved end-to-end.
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Feb 26
Everything here is early evidence for a deeper thesis: as the problems we need to solve grow in difficulty, the systems that solve them must grow in diversity.
Heterogeneous systems - diverse models on diverse hardware, co-evolved end-to-end - unlock scaling territory that homogeneous systems cannot access.
In our next post, we formalise this into a theory - a new scaling principle.
The configuration space is vast and we have only just begun to explore it.
Welcome, Heterogeneous Intelligence.
callosum.com/blog/welcome-he…
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