AI development agency in London
We design and ship production-grade LLM applications — autonomous agents, retrieval pipelines and AI products that hold up under real users, built with Claude, GPT and the best open-source models.
Plenty of teams can bolt a chatbot onto a product. An AI development agency earns its keep somewhere else: turning a model's raw capability into software that is reliable, measurable and safe to put in front of customers. That means engineering around the failure modes — hallucination, drift, cost blowouts, prompt regressions — rather than pretending they don't exist. It's the difference between a demo that impresses in a meeting and a system your business can depend on.
BrashPixels is a small, senior London studio. We work in short, high-agency cycles: a working prototype early, validation with real users, then production hardening. No layers of account management, no hand-offs — the people you talk to are the people who build.
What we build
Agent frameworks
Custom agents with tool use, memory and guardrails — built on Claude with LangChain/LangGraph where it helps, or lean first-party orchestration where it doesn't.
RAG & search
Retrieval-augmented generation pipelines with careful chunking, embedding reranking and citation, so answers are grounded in your data.
Evals & observability
Systematic evaluations, prompt regression suites and real-time monitoring — the unglamorous work that makes AI dependable.
Model selection
Unbiased comparisons across capability, latency, cost and governance. Claude, GPT, Gemini or open-source — the use case decides, not a partnership deal.
How we work
Every engagement starts with a short discovery phase — often the tail end of an AI consultancy sprint — where we pin down the user, the workflow and the measurable outcome the AI has to move. Then we prototype fast: a working slice of the product in the first couple of weeks, tested against real data.
From there it's production engineering: evaluation suites so quality is measured rather than guessed at, monitoring so regressions surface before your users find them, and infrastructure that keeps inference costs predictable. A focused MVP ships in 4–8 weeks; larger programmes run three to six months with regular delivery milestones.
Recent work
Fintech compliance agent
Autonomous regulatory monitoring agent that reduced manual review time by 70%.
Legal document assistant
Claude-powered contract analysis with clause extraction and risk flagging.
E-commerce chat + search
Hybrid conversational search combining GPT-4o with vector search for product discovery.
Internal knowledge copilot
RAG-based assistant ingesting Notion, Slack and docs for instant team Q&A — the pattern behind much of our AI automation work.
London studio, working anywhere
We're based in central London and run workshops, sprints and working sessions in person when it helps — many clients find the early discovery phase lands much faster face to face. Delivery is remote-friendly by default, and we work with teams across the UK, Europe and the US.
Frequently asked questions
How much does AI development cost in the UK?
A focused MVP typically starts in the low tens of thousands of pounds and ships in 4–8 weeks. Larger programmes run 3–6 months with regular delivery milestones. The biggest cost drivers are integration complexity, data readiness and how much evaluation rigour the use case demands.
How long does an AI development project take?
A production-ready MVP usually ships in 4–8 weeks. We work in short cycles: a working prototype early, validation with real users, then production hardening with evals and monitoring.
Can you take an existing AI prototype to production?
Yes. We regularly take research code or proof-of-concept apps and productionise them with proper evaluations, prompt regression suites, monitoring and infrastructure.
Who owns the code and IP?
You do. Everything we build — code, prompts, eval suites and documentation — is delivered into your repositories and owned by you.
Start a project
Tell us what you're building and we'll set up a no-obligation call. Or email hello@brashpixels.com.