ChatGPT Custom GPT Development · Cardiff
ChatGPT Custom GPT Development in Cardiff
Building custom GPTs for Cardiff organisations, with one property that should govern what goes into them. The instructions and uploaded files are available to anyone who can use the GPT — a determined user can generally get them out — so nothing should be included that you would not be content for every user to read directly.
Why this comes up
The problem
Confidential pricing rules were put into a custom GPT's instructions, and any user can persuade it to recite them.
What you get
What we deliver
- Content included on the assumption that users can retrieve it verbatim
- Instructions written as behaviour, with the knowledge kept in uploaded files
- Files curated and current, since a stale document produces confident wrong answers
- Sharing scope set deliberately — a team, the organisation, or wider
- Actions connected to real systems where a lookup adds genuine value
- An owner assigned, because an unmaintained GPT degrades without anyone noticing
Want this scoped for your business in Cardiff?
Thirty minutes, no charge, no sales script. You leave with a written summary of what chatgpt custom gpt development would actually involve — whether or not you use us.
Working in Cardiff
Wales
Cardiff has a significant broadcast and media sector alongside a large public-sector presence, and Welsh-language provision is a genuine requirement on public-facing work here rather than a nice-to-have.
Public sector and broadcast work is common, and bilingual provision is usually a requirement rather than an option.
Sectors we work with in Cardiff
- Media & Broadcasting
- Financial Services
- Public Sector
- Higher Education
- Sport
What we work with
Technologies and platforms
- ChatGPT
- OpenAI API
- REST APIs
- Microsoft 365
Who we work with
Industries we serve
- Professional services
- Financial services
- Marketing agencies
- Manufacturing
- Retail
Why us
Why Cardiff businesses choose Asionis
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise
How we work
- Step 1
Free consultation
A 30-minute call to understand the problem. You keep the written summary either way.
- Step 2
Proposal
Scope, timeline and a fixed price, in writing, before anything starts.
- Step 3
Build
Short cycles with regular check-ins, so you see progress rather than hear about it.
- Step 4
Launch and support
We handle the go-live and stay available afterwards.
Other services in Cardiff
Looking for the full picture? See our ChatGPT Custom GPT Development services, everything we do in Cardiff or browse everything we do.
ChatGPT Custom GPT Development in Cardiff — common questions
- Can users see the instructions?
- Assume so. There are ways to discourage it and none that reliably prevent a determined user from extracting the instructions or the contents of uploaded files, so the safe design is to include only what you would be comfortable publishing to its audience.
- What makes a custom GPT worth building?
- A repeated task with consistent context. If a team keeps pasting the same background before asking similar questions, packaging that is genuinely useful — whereas a GPT built to look impressive with no repeated task behind it goes unused.
- How current do the files need to be?
- As current as the answers need to be. Uploaded documents do not update themselves, so a GPT built on last year's policy will answer confidently from it — which is why an owner and a review date matter more than the initial build.
- When should we build something custom instead?
- When you need control over data, auditability, or integration beyond what actions provide. Custom GPTs are excellent for packaging context for internal use and are not the right home for anything customer-facing or governed.
- Do you work with businesses across Cardiff?
- Yes. We are based in Leicester, United Kingdom and work with clients throughout Wales, including Cardiff and the surrounding Cardiff area. Most collaboration happens remotely, and we travel for kick-offs and key milestones.
- What kind of Cardiff businesses do you usually work with?
- Public sector and broadcast work is common, and bilingual provision is usually a requirement rather than an option. Beyond that we work across Media & Broadcasting, Financial Services, Public Sector, Higher Education and Sport.
- Do you cover the areas around Cardiff?
- Yes — we work throughout Wales, including Bristol, Swansea. Cardiff is an urban area of roughly 490,000+, and we take on work across the wider Cardiff region rather than the city boundary alone.
Talk to us about ChatGPT Custom GPT Development in Cardiff
A 30-minute call with someone who would actually work on it. No sales script, no obligation.
- Projects typically launched within 4–8 weeks
- No long-term contracts required
- All team members UK-based
- Dedicated account manager and development team
- Transparent reporting with monthly performance metrics
- Scalable from startup to enterprise