Cosine @CosineAI

"Swarm mode was great!" @andrewkuanop won the Cosine prize at yesterday's @AntlerGlobal hackathon after building marketing tool, Cast, in just a few hours. Here's what the team built & how @CosineAI helped✨

The sound of building at the Deploy Hackathon in London, hosted by @AntlerGlobal and @Google. You know these devs have something cooking 👀 Building with @CosineAI, @vercel, @lovable, and @OvermindLab

We are incredibly proud to have @BAESystemsplc supporting our landmark industry coalition. Together, we are co-designing Lumen Sovereign to ensure the UK has an unshakeable, self-reliant AI stack built for our most critical defence environments.

BAE Systems @BAESystemsplc

a day ago

Why does the 🇬🇧 need its own 'frontier AI' model? For defence, it means greater resilience and stronger data security. That's why we support @CosineAI's work on a complete UK AI stack, built on UK soil. Even if satellite links or undersea cables were cut, sovereign AI would keep

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Today, Cosine hosted a breakfast panel in Westminster on Britain’s AI future, discussing how we can move from "takers to makers" through procurement reform and strategic investment. Huge thanks to our panelists and Lord Ed Vaizey for the insightful discussion.

As Co-founder of @CosineAI I am deeply invested in the future of British technology, and it’s become clear that AI capability is now strategic national infrastructure. The coalition announced today comprises some of the UK’s largest and most critical institutions, including BAE Systems, Babcock International Group, BT, Era4, HSBC, Leonardo, Lloyds Banking Group, LSEG, NatWest Group, PwC, Telefónica Tech UK&I, Thales UK, and The Alan Turing Institute - with more to be announced! We are committed to being a true AI maker rather than an AI taker, ensuring we build on exactly what helps British society thrive. The journey to a sovereign AI future starts now. Full announcement: cosine.sh/blog/building-…

We are committed to securing the future of AI for the UK. Read the full announcement and see the complete list of coalition members here: cosine.sh/blog/building-…

This assurance-by-design capability will be trained entirely on UK soil using Isambard-AI, ensuring secure, air-gapped deployment for the UK’s most critical sectors. The coalition is actively defining high-stakes use cases, from cyber testing to secure legal review.

We are excited to announce that Cosine has assembled a landmark coalition – including BAE Systems, HSBC, BT, NatWest, and PwC – to co-design Lumen Sovereign, Britain’s first fully sovereign AI capability, backed by the UK government's @UKSovereignAI initiative. Read more below.

Big day for us Cosine, very excited to announce this publically and, again, thanks for Sovereign AI for helping make this possible. Lumen Sovereign will be built with input from some of the largest companies in Britain including HSBC, BAE Systems, Babcock International Group, BT Group, NatWest, LSEG, PwC, Barclays, Telefónica Tech, Thales, Lloyds Banking Group with more to be announced soon.

Seb Johnson @SebJohnsonUK

3 days ago

The UK is getting its own Sovereign Frontier AI Model! It is being trained on Isambard-AI and will run with no dependence on foreign infrastructure. The model, Lumen Sovereign, is being built by @CosineAI, one of the companies selected by the UK Government for its £500m

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The UK is getting its own Sovereign Frontier AI Model! It is being trained on Isambard-AI and will run with no dependence on foreign infrastructure. The model, Lumen Sovereign, is being built by @CosineAI, one of the companies selected by the UK Government for its £500m Sovereign AI programme. The startup is working with leading big companies (such as Babcock, BT, Lloyds LSEG, NatWest Group, PwC) to help design it. Cosine was founded by @AlistairPullen and @yangli_ and its models have outperformed OpenAI, Anthropic, Mistral, and DeepSeek on independent coding benchmarks for two consecutive years. The model will be trained using compute provided by @UKSovereignAI! Amazing stuff @Jameswise, @SuzanneAshman, @KanishkaNarayan.

If you're in London and building with AI, you should come to this. We're partnering with @AntlerGlobal for Deploy at Google London on 10 June. You'll get access to @CosineAI coding agent, a room full of ambitious builders, and prizes for the best projects. Join us!👇 luma.com/j6wkjmkf

Cosine is an AI coding agent for real software engineering. It scales from quick fixes to complex migrations, working in your codebase via CLI or Cloud. Available on macOS, Linux, and Windows.

Gemini 3.5 Flash is now available in Cosine. With impressive response times, our engineers have found that the model is best suited for high-frequency code edits, rapid-fire debugging, and swift repository-wide exploration.

Excited to announce Tom Dowley is our new Head of Engineering at @CosineAI A rare mix of intellectual curiosity and pragmatic, charismatic leadership. Ready to build the best with him.

Build an offline AI agent. Join Cosine's track at @OvermindLab’s Localhost Agentic Hackathon on 20 June. Design, build, and deploy autonomous agents onto physical hardware with zero internet connectivity. Hosted by @dawncapital with limited spaces: luma.com/8og1gx56

From a hand-tracking AR app to a dentist’s revamped landing page — so many cool concepts hacked out with @CosineAI at @RamenClubHQ

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AI coding is now 55% of enterprise inference, but it’s blocked by three core fears: security, cost, and control. At Cosine, we solved them: → Extreme security, even air-gapped → Lumen Outpost: Our specialized model for max efficiency and lowest cost → Real-time traceability

AI is reshaping software & services, but execution is challenging. With the £500M Sovereign AI fund backing UK startups like @CosineAI the UK has a critical window to lead. Join our private breakfast panel on June 9th in London to discuss the future of UK AI leadership ↓

One year ago, I joined @CosineAI as an intern. Back in January, I took a full-time Product Marketing role mid-dissertation. I went from feeling behind to achieving more than expected in 12 months. Been a great ride so far. Thanks to the team – looking forward to what's next.

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Cosine is partnering with @AntlerGlobal for their Deploy hackathon at Google London on 10 June. Build production-grade software with our cutting-edge coding agent. Cash prizes. Hosted by @GoogleStartupUK and credits by @Lovable – with tracks from @OvermindLab, @paid_ai, Ralio, + Listo. Limited spaces. Grab yours: luma.com/j6wkjmkf