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Getting Qubi ready.
Infrastructure

GPU sizing and cost.

In our experience GPU quotes are more often too large than too small. Sizing is not guesswork — it comes out of three numbers you already have, and getting it right is usually the difference between a project that clears its business case and one that does not.

All AI Hosting & Infrastructure →
Pixel illustration for GPU Sizing & Cost: a processing chip with cooling fins and modular memory blocks.

The three numbers that decide it

01

Model memory footprint

Parameter count multiplied by bytes per parameter, plus overhead. At half precision that is roughly two bytes per parameter; quantised to eight or four bits it drops proportionally, at a quality cost you should measure rather than assume. This sets the floor: a model that does not fit does not run.
02

Context and concurrency

Every concurrent request holds a KV cache whose size scales with context length. This is the number teams forget, and it is frequently larger than the model itself. Twenty users on long documents need materially more memory than twenty users on short questions.
03

Throughput target

Tokens per second at your peak, derived from requests per hour, output length and how long a user will wait. Batching means throughput scales far better than intuition suggests — one node serves more people than most quotes assume.

Where quotes go wrong

  • Sizing for peak concurrency that never happens.

    Internal tools have usage patterns shaped like a working day, not like a consumer product. Sizing for simultaneous use by every licensed user produces a machine that is idle ninety per cent of the time. Size for realistic peak, and queue gracefully beyond it.
  • Ignoring quantisation.

    Running at eight-bit or four-bit precision cuts the memory requirement substantially, and on many tasks the quality difference is often not measurable on a real evaluation set. It is not free and it is not universal — but testing it before buying twice the hardware is an afternoon's work with a large payoff.
  • Choosing a model larger than the task needs.

    The most expensive sizing error happens before any hardware is discussed. If a small model handles eighty per cent of your requests identically — which is testable in a day — then the hardware conversation is about a much smaller machine, and the remaining twenty per cent has a routing answer rather than a procurement one.
  • Forgetting that batching exists.

    A serving stack like vLLM batches continuously, so aggregate throughput on one node is far higher than a single-request benchmark implies. Sizing from single-request latency alone can overshoot by a large factor.

Buy, rent or call an api

Compare your options
The structural cost shapes of the three options. Which one wins depends on your volume, and the crossover is arithmetic rather than opinion.
Criterion Public API Rented cloud GPU Owned hardware
Upfront cost None None Significant
Cost shape Per token Per hour, running or not Depreciation + power
Cost at high sustained volume Worst Middle Best
Cost at low or spiky volume Best Middle Worst
Data stays on your hardware No No Yes
You operate it No Partly Yes
Sensible for Prototypes, low volume Bursty or uncertain load Steady production volume

The crossover calculation is not complicated and we do it in the open: take your projected monthly token volume, price it at the API rate you would actually pay, and compare it against the monthly cost of ownership — hardware amortised over three years, plus power, plus a realistic fraction of an engineer. The number that decides it is usually the last one, and it is the one most comparisons leave out.

Two honest observations from doing this repeatedly. First, the arithmetic favours ownership sooner than most people expect once volume is genuinely sustained, because API pricing is linear and hardware is not. Second, it favours the API far longer than vendors of hardware will tell you when volume is spiky, because an idle GPU costs the same as a busy one.

Questions

Questions about GPU Sizing & Cost.

Can we start with one GPU?

Very often, yes. A single well-specified accelerator runs a capable mid-size open model for a meaningful number of internal users, and it is the right way to prove the deployment before committing to a cluster. Scaling out later is a known quantity; scaling down after over-buying is a write-off.

Do we need the newest generation?

Not usually. Memory capacity matters more than raw compute for most inference workloads, and previous-generation cards with generous memory are frequently better value than current-generation cards with less. That is a specification question we work through with your actual model, not a brand preference.

How much does quantisation cost in quality?

Sometimes nothing measurable, sometimes a lot — it depends on the model and the task, which is why it is a measurement rather than a rule. We run your evaluation set at full and reduced precision and show you both numbers before anyone signs a purchase order.

What about electricity and cooling?

Real and worth including, and usually a smaller line than people fear relative to the hardware amortisation. It matters most for the office-based on-premise case, where it can also be a physical constraint on what the room can actually host.

Before you sign
the purchase order.

Send us the workload. We will size it properly and tell you if the quote you are holding is too big.

30-minute technical call · no deck

Shipped & in build

Real work. Check it yourself.

What we built, what stage it is at, and a link to the live thing wherever there is one.

The updated yourOS homepage: Roxy’s open ring surrounded by bento cards for calls, voice, translation, building, design, apps and more.
The yourOS homepage on a phone, with its compact navigation, welcome film button and bento cards.
youros.tech — the homepage bento hero
Our own · coming soon

yourOS

yourOS is an operating system with an AI at its heart. You talk to it like a person, out loud or typed. It makes your calls, plans your days and works on your projects with a crew of agents, on your own private server. Our own product, built from the first commit; the waitlist is open.

What we built
  • Operating system
  • Roxy
  • Agent crew
  • Voice calls
  • App store
  • Website
Meet yourOS →
The Sonora homepage on desktop: a full-bleed dune landscape behind the headline “Transform Your Life with Sound”, with App Store and Google Play download buttons.
The Sonora homepage on a mobile viewport, showing the same hero reflowed to a single column.
sonora.com — homepage, 1440×900
Live · iOS · Android

Sonora

Website, backend and app assets for Sonora, a free AI sound-therapy app on iOS and Android published by Cognitive AI.

What we built
  • Website
  • Backend
  • App assets
Read the case study →
The updated Podswap homepage on desktop: “Grow on Instagram and TikTok for free, with real engagement from creators your size”, beside a tilted wall of exchange, tool and guide cards on a violet gradient.
The updated Podswap homepage on a phone, with its floating navigation, Instagram and TikTok engagement headline and tilted tool cards.
podswap.app — homepage, 1440×900
Five platforms

Podswap

Brand, website, prototype, apps on five platforms, the AI backend and the algorithm-intelligence pipeline for Podswap, a social growth engine that runs without a human in the loop.

What we built
  • Brand
  • Website
  • Prototype
  • Apps on five platforms
  • AI backend
  • Algorithm pipeline
Read the case study →
The unOpen.AI homepage introducing Roxy, a private AI assistant that remembers who you are.
The unOpen.AI homepage on a mobile viewport.
unopen.ai — homepage, 1440×900
Prototype · closed beta

unOpen.AI

In closed beta: Roxy, a private AI assistant with permanent memory running on infrastructure the user owns. Brand, site, product, backend and conversational design.

What we built
  • Brand
  • Site
  • Product
  • Backend
  • Conversational design
Read the case study →
coherence.com on desktop, headed "Intelligence that moves in phase with people".
coherence.com on a mobile viewport, reflowed to a single column.
coherence.com — homepage, 1440×900
Live

Coherence

Live at coherence.com: brand identity generated with AI agents we directed, the motion system and website for the group behind Sonora, AboutAI, WakeUp and MudShadows. Agent work remains in build.

What we built
  • Brand identity
  • Motion system
  • Live website
  • Agent work — in build
Read the case study →
The new Domain Booth homepage on desktop: the headline “Premium Domains. Serious Buyers. Proven Results.” beside the animated DB monogram.
The new Domain Booth homepage on a phone, reflowed to a single column.
Our build of the Domain Booth homepage — 1440×900
Live

Domain Booth

Live at domainbooth.com for DomainBooth, a premium domain brokerage: a new animated mark, every page redesigned and rebuilt with designed mobile layouts, and a custom CMS for its sales record, featured names, press and enquiries.

What we built
  • Animated mark
  • Every page redesigned
  • Designed mobile layouts
  • Custom CMS
Read the case study →
Who we have built for

Twenty-one years. Names you know.

Apps, platforms and campaigns for these teams, long before the AI work. Every one is written up on the work page — what we did, and where our part ended.

See all of our work →
  • BBC Good Food logo
  • Charities Aid Foundation logo
  • GAME logo
  • NatWest logo
  • Next logo
  • NSPCC logo
  • Tesco logo
  • Worldpay logo
  • Samsung logo
  • Sony logo
  • Land Rover logo
  • UAP Limited logo
  • Netflix logo
  • Amazon Prime Video logo
  • Mercedes-Benz dealerships logo
  • San Miguel logo
  • Biovene Barcelona logo
  • Seventy7 logo
  • Littlewoods logo
  • Smile logo
  • The Co-operative Bank logo