AI for coaches · November 11, 2026
ChatGPT or Claude? Which One to Connect to Your Personal Training Business
Both can read and manage your clients in TrainerStudio. What changes is the plan you need and how you set them up.
Short answer: connect the one you already use. ChatGPT and Claude connect to TrainerStudio with the same URL and the same tools, so they can do the same things with your clients. If you don't pay for either, start with Claude: its free plan allows one custom connector. ChatGPT needs a paid plan with developer mode. If you're unsure, connect both and make the same request in each.
ChatGPT and Claude with TrainerStudio, side by side
| Aspect | ChatGPT | Claude |
|---|---|---|
| Minimum plan | Paid with developer mode: Plus, Pro, Business, Enterprise or Edu. Not Free or Go. | Any plan, including the free one (limited to 1 custom connector). |
| Where you set it up | ChatGPT in a desktop browser: turn on developer mode and add the connection. | Claude (web or desktop app): Customize → Connectors → Add custom connector. |
| URL you paste | https://api.trainerstudio.com/mcp | https://api.trainerstudio.com/mcp |
| Sign-in | Your TrainerStudio email and password on api.trainerstudio.com. | Your TrainerStudio email and password on api.trainerstudio.com. |
| How you use it | Type @TrainerStudio or start with “Use TrainerStudio to…”. | With the connector on, Claude decides when to check your account. |
| Before saving or sending | Asks for confirmation on write actions, depending on your settings. | Asks permission to use each tool, depending on your settings. |
| Company accounts | The admin decides whether developer mode can be used. | On Team and Enterprise the owner adds the connector and each person signs in with their own account. |
Sources: OpenAI's help article on MCP servers and Anthropic's help article on custom connectors, checked on November 11, 2026. Plans and menu names change often.
What's the same in both
TrainerStudio provides the connection, not the assistant. So whichever you pick:
- The same tools: clients, programs, workouts, exercises, metrics, nutrition and chat.
- The same permissions you have in the app: they only see the clients in your account.
- Neither touches payments, billing or account settings.
- Whatever they save shows up instantly in TrainerStudio and in your client's app.
- You can disconnect whenever you want from the assistant's settings.
Both connections use MCP, the open standard that lets an assistant work with other apps. We explain it without jargon in what MCP is for a coach.
When to choose ChatGPT
- You already pay for ChatGPT Plus or higher and use it daily: you don't add another subscription or another app.
- You like deciding when TrainerStudio comes in: you call it with @ in the conversation and the rest of the time it's your usual ChatGPT.
- Your team already works in ChatGPT Business and the admin allows developer mode.
Next step: how to connect ChatGPT to TrainerStudio.
When to choose Claude
- You want to try it without paying. Claude's free plan allows one custom connector.
- You prefer a one-minute setup with no special modes to turn on: Connectors → Add custom connector → paste the URL.
- You work as a team on Claude Team or Enterprise: the owner adds TrainerStudio once and each coach signs in with their own account.
Next step: how to connect Claude to TrainerStudio and then our Claude prompts for coaches.
Test it yourself: 4 requests
The best comparison is your own. Connect both, open a new conversation in each and paste the same thing, using names of your clients:
- “Which active clients haven't trained in the last 7 days?”
- “Summarize how Carlos's deadlift has progressed over the last 3 months.”
- “Propose a 3-day strength program with exercises from my library. Don't save it yet.”
- “Draft a message to Laura asking how her week went. Show it to me before sending.”
Look at three things: whether the data matches what you see in the app, how much you have to correct the proposal, and whether it respects what you asked (don't save, don't send). Keep the one that makes you work less.
What if you use neither?
Any MCP-compatible assistant that supports remote servers connects with the same URL. And if what you need is for things to happen on their own, like signing up whoever fills in your website form, you're not looking for an assistant but the TrainerStudio API.
Frequently asked questions
Can I connect ChatGPT and Claude at the same time?
Yes. Each assistant has its own connection to your account, and you can disconnect one without affecting the other.
Which one is better for programming workouts?
Both use the same TrainerStudio data and tools, so the difference is in the model and in how you work. Make the same request in both with a real client and keep the one whose proposals you change less.
Does it work with Gemini, Copilot or other assistants?
It works with any MCP-compatible assistant that supports remote servers, using the same URL. If your assistant doesn't support it, the alternative is the TrainerStudio API.
Can I connect Claude without paying?
Yes. Claude's free plan allows one custom connector, which is enough for TrainerStudio. ChatGPT needs a paid plan to add your own connections.
Is it safe to give an AI access to my clients?
The assistant only sees what your coach account can see and asks for confirmation before changing anything. What it looks up enters the conversation and is handled by the assistant's company under your account, so ask only for the data each task needs.
