Plan quality
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Open Triathlon Coach for ChatGPTAI coaching app for triathlon
Open-source custom GPT that reads intervals.icu data and writes agreed triathlon workouts to the intervals.icu calendar.
–overall of 5
Not ranked yet (4 of 8 scored dimensions needed) · 0 of 8 dimensions scored · entry reviewed
- Sports Triathlon
- AI level Conversational AI coach
- Plan unverified
- Human coach unverified
- Price unverified
- Pushes workouts to 1 device or app
Open Triathlon Coach is an MIT-licensed custom GPT for ChatGPT that connects to the athlete's intervals.icu account through OAuth. It reads activities, thresholds, zones, wellness data (sleep, HRV, resting heart rate) and the calendar, reviews completed sessions against their intended purpose, and helps build or adjust the next session, week or training block, including tapers and race-specific targets. Agreed workouts are created in the intervals.icu calendar only after the athlete confirms; there is no separate planning engine or automatic re-planning. Its knowledge is triathlon-focused. It runs inside ChatGPT and needs a ChatGPT session in which custom GPT Actions are available; the project reports the connection as validated on ChatGPT Plus, unavailable in its Free test account, and other plans untested. Public beta, maintained by independent contributors.
AI level: Conversational AI coach. An LLM-based coach the athlete talks to in free text; it can explain, negotiate and change the plan, usually on top of a model-driven or rule-based planner. github.com
What the coach does
Thirteen capabilities, as stated on the vendor's own pages: 2 yes, 7 partly, 0 no, 4 unverified. Unverified means the vendor's pages checked do not say; it does not mean absent.
| Capability | Vendor says | Source |
|---|---|---|
| Plan | ||
| Builds a periodized planYes means: Plan generated from goal, date, availability and current fitness, with phases.github.com | Partly | github.com |
| Precise workout prescriptionYes means: Interval-level targets (pace, power or HR) executable on a device.github.com | Partly | github.com |
| Race preparationYes means: Race blocks, taper and a pacing or race-day plan for the target event.github.com | Partly | github.com |
| Adapt | ||
| Adapts to lifeYes means: Missed or moved sessions and availability changes re-flow the plan automatically.github.com | Partly | github.com |
| Adapts to fatigueYes means: Load changes from HRV, sleep, resting HR or subjective feel without the athlete asking.github.com | Partly | github.com |
| Handles injury and illnessYes means: Pause and return-to-training progression, not just skip. | unverified | |
| Relationship | ||
| Post-workout feedbackYes means: Per-session analysis referencing the athlete's data and the plan's intent.github.com | Yes | github.com |
| ConversationYes means: Free-text chat that can answer questions and change the plan.github.com | Yes | github.com |
| Check-ins and accountabilityYes means: Scheduled check-ins, debriefs or reminders initiated by the app. | unverified | |
| Human coach in the loopYes means: A human coach reviews or messages, included or as an add-on. | unverified | |
| Beyond endurance | ||
| Strength and mobilityYes means: Prescribed strength or mobility sessions scheduled alongside endurance work. | unverified | |
| Nutrition and fuelingYes means: Session- or day-specific fueling numbers.github.com | Partly | github.com |
| Multisport planningYes means: Balances load across sports in a single plan.github.com | Partly | github.com |
Works with
1 partners named on the vendor's pages; structured workouts go to 1. ✓ means the vendor states it, – means not stated. A partner not listed is unverified, not unsupported.
| Partner | Reads activities | Pushes workouts | Wellness data | Source |
|---|---|---|---|---|
| Training platforms | ||||
| intervals.icuOAuth: reads activities, wellness and calendar; creates calendar workouts after confirmation.github.com | ✓ | ✓ | – | github.com2026-10-13 |
Pricing
- Model
- unverified
- Monthly
- unverified
- Annual
- unverified
- Free tier
- unverified
- Trial
- unverified
No per-plan breakdown verified on the vendor's pages.
Scores and evidence
Each dimension is scored 1 to 5 against the published rubric and cites one public page. Overall – is the mean of the 0 scored dimensions.
| Dimension | Score | Bar | Median |
|---|---|---|---|
| Plan quality | – | 3 | |
| Adaptation | – | 4 | |
| Workout feedback | – | 3 | |
| Coaching relationship | – | 2 | |
| Multisport planning | – | NaN | |
| Transparency | – | 3 | |
| Value for money | – | 3 | |
| Athlete sentiment | – | 3 |
Adaptation
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Workout feedback
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Coaching relationship
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Multisport planning
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Transparency
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Value for money
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
Athlete sentiment
No public evidence yet, so this dimension is not scored and does not count toward the overall. What would count as evidence
What athletes say
Independent reviews, forum threads and store listings consulted for the scores. Titles as published; read them at the source.
Questions about this app
Answered from the cited facts above only. A question is left out when its fact is unverified.
What kind of AI coach is Open Triathlon Coach for ChatGPT?
Open Triathlon Coach for ChatGPT is classified as "Conversational AI coach": An LLM-based coach the athlete talks to in free text; it can explain, negotiate and change the plan, usually on top of a model-driven or rule-based planner.
Does Open Triathlon Coach for ChatGPT push workouts to my watch or bike computer?
Yes. The vendor states structured workouts are sent to intervals.icu.
Does Open Triathlon Coach for ChatGPT adapt the plan to fatigue and sleep?
Partly. Load changes from HRV, sleep, resting HR or subjective feel without the athlete asking.
Which sports does Open Triathlon Coach for ChatGPT coach?
Triathlon.
Is Open Triathlon Coach for ChatGPT open source?
Yes, according to the vendor.
Similar apps
Apps for the same sport, ordered by how many coaching capabilities they share with Open Triathlon Coach for ChatGPT.
Vendor sources consulted
Spotted an outdated fact? Send the vendor page that states the current one.