Platform comparison
TrainingPeaks vs Intervals.icu for AI Training
TrainingPeaks vs Intervals.icu for training with AI: Intervals.icu is free for personal use and has an official AI connector in its Supporter plan, and STAS adds ChatGPT and Claude on top of it. TrainingPeaks has a free Basic account and a paid Premium plan.
Connect Intervals.icu dataSTAS starts free, no credit card. A custom connector in ChatGPT or Claude depends on your ChatGPT or Claude plan.
Short answer
If your goal is to coach yourself with ChatGPT or Claude on your real data, Intervals.icu with STAS is the route we can describe end to end. If you already use TrainingPeaks for a coach or a plan, keep it for that: this page does not claim a way to connect it to an AI.
- ✓Intervals.icu is free for personal use. Its official AI connector is part of the Supporter plan ($4 a month on 6 November 2026).
- ✓TrainingPeaks Premium costs $19.95 a month or $134.99 a year on its pricing page on 6 November 2026, with a 14-day free trial.
- ✓STAS starts free, no credit card, and works with ChatGPT and Claude on your Intervals.icu data.
First useful action
Turn Intervals.icu plans into coaching context
STAS lets ChatGPT or Claude read the same workout history and calendar that your plan depends on.
Connect the source of truth
Intervals.icu keeps workouts, calendar, load, zones, and recent history in one place.
Let AI see real context
STAS prepares that data so ChatGPT or Claude can answer from your actual training, not a pasted summary.
Ask for the next decision
Start with a clear analysis or action: recovery check, missed workout, next week, or one session to adjust.
STAS reads only the training data you approve through Intervals.icu. Start with one practical question: current condition, a workout review, or what to change next.
Connect Intervals.icu dataRoutes compared
Facts about TrainingPeaks and Intervals.icu come from their own pages, checked on 6 November 2026.
TrainingPeaks
Pros: a free Basic account, a paid Premium plan with a 14-day free trial, and coaching tiers listed on its pricing page. Cons: Premium is paid ($19.95 a month or $134.99 a year for Premium, per its pricing page).
Intervals.icu
Pros: free for personal use, deep analytics, calendar and workout builder, official AI connector for Claude, ChatGPT, Gemini and Grok. Cons: the connector needs the Supporter plan ($4 a month).
Intervals.icu with STAS
Pros: one STAS account and shared saved context across ChatGPT and Claude, a ready summary of your history, plan written to the calendar after you confirm. Cons: needs an Intervals.icu account, and your watch must send workouts to Intervals.icu.
Staying where you are
Pros: no migration. Cons: if your data is only in a platform without an AI connection, you copy workouts into the chat by hand.
Which one to choose
- ✓Choose Intervals.icu with STAS if you coach yourself and want ChatGPT or Claude to see your real training.
- ✓Keep TrainingPeaks if a coach assigns your plan there. You can still run Intervals.icu next to it from the same watch, if your watch brand sends data to both.
- ✓Check your watch brand: Garmin and several others send workouts to Intervals.icu directly. See the compatibility guide.
Steps: try Intervals.icu with AI
You do not have to leave TrainingPeaks to test this.
- 1Create a free Intervals.icu account.
- 2In Settings → Connections, connect your watch brand and let a few weeks of history load.
- 3Open Activities and check that recent workouts show pace, heart rate or power.
- 4Sign in to STAS with the same Intervals.icu account.
- 5Connect ChatGPT or Claude as shown below, then ask for an update of your data.
Connect STAS to ChatGPT or Claude
ChatGPT and Claude use the same STAS data. Sign in with the Intervals.icu account that receives your workouts.
ChatGPT
- 1Open chatgpt.com on a computer, in a browser. Turn on Developer mode: Settings → Security and login → Developer mode.
- 2Go to Plugins, select + and choose Add custom MCP server.
- 3In Name, enter STAS. Keep Server URL and paste https://stas.run/api/mcp. In Authentication, choose OAuth.
- 4Tick I understand and want to continue and select Create. When ChatGPT asks you to sign in, use Intervals.icu.
- 5In a chat, type @, select STAS and ask your question.
No Developer mode or Add custom MCP server in your ChatGPT? Use the older option, STAS GPT. It opens as a separate chat, runs on an older ChatGPT model and is no longer updated.
Claude
- 1In Claude, open Customize → Connectors → Add custom connector.
- 2Paste the STAS connector URL: https://stas.run/api/mcp.
- 3Finish the sign-in through Intervals.icu with the same account.
- 4Enable STAS in the chat and ask Claude to update your data first.
Try Intervals.icu with ChatGPT or Claude
Connect your data once and ask the AI about your real training.
Connect STASSTAS starts free, no credit card. A custom connector in ChatGPT or Claude depends on your ChatGPT or Claude plan.
How to check that your first workout is visible
Check a real workout before you decide.
- 1In ChatGPT or Claude, write: Update my data, then list my last three workouts with date, distance, duration and average heart rate.
- 2Compare the answer with Activities in Intervals.icu.
- 3If a workout is missing, check that it is visible in Intervals.icu first.
- 4Ask for a short weekly review to see how the AI uses your history.
What the AI can and cannot see
The AI can see
- ✓Workouts that reached Intervals.icu, with the fields your watch recorded.
- ✓Training load, wellness, goals, profile and rules saved in STAS.
- ✓Your Intervals.icu calendar.
The AI cannot see
- ✓Data that is only inside TrainingPeaks. STAS reads data through Intervals.icu.
- ✓Activities that reached Intervals.icu through Strava, only their date.
- ✓Anything your watch did not record or sync.
STAS reads only data you approve through Intervals.icu. How STAS handles it is described in the privacy policy.
How STAS differs from a direct connector
An official connector gives an AI access to one service. STAS adds the following on top of your Intervals.icu data.
One STAS account for every watch brand
Add the same STAS connector to ChatGPT and to Claude, and both work with the same saved context.
Context, not raw data
The AI gets a ready summary of load, workouts, wellness, profile, goals and rules, so answers rest on your own history.
The plan returns to the calendar
After you confirm, the plan is written to your calendar, and from there to the watch where the brand supports it.
A convenient interface instead of manual setup
No terminal or API keys. Profile and settings on the site, reports in Telegram, start without a card.
Frequently asked questions
Is Intervals.icu free?
Intervals.icu is free for personal use. Its official AI connector is part of the Supporter plan, $4 a month on 6 November 2026.
How much is TrainingPeaks?
Its pricing page on 6 November 2026 lists Premium at $19.95 a month or $134.99 a year in US dollars, with a 14-day free trial. Check the page for current prices in your region.
Can I connect TrainingPeaks to Claude or ChatGPT?
Check TrainingPeaks for its current AI options. The route this guide describes end to end is Intervals.icu with STAS: connect your watch to Intervals.icu, then connect STAS to ChatGPT or Claude.
Do I need Supporter on Intervals.icu for STAS?
No. Supporter is needed for the official Intervals.icu connector. STAS uses its own connection and starts free.
Can I use both platforms?
If your watch brand sends data to both, yes. Then keep TrainingPeaks for a coach and use Intervals.icu with STAS for your own AI questions.
Does the AI write workouts to my calendar?
With STAS, yes, after you confirm: the plan is written to your Intervals.icu calendar. Delivery to the watch depends on the brand.
Related guides
Test it on your own data
Connect Intervals.icu, add STAS to ChatGPT or Claude and compare the answers with your current setup.
Connect STASSTAS starts free, no credit card. A custom connector in ChatGPT or Claude depends on your ChatGPT or Claude plan.