Chapter IV
AfiniTwin versus the real alternatives
Honest comparison against the six options people consider before subscribing to afini.ai: ChatGPT Memory, Claude Projects, Gemini Gems, custom GPTs, profiles built «by talking to the AI», and prompt templates. Differences by dimension, not slogans.
What exactly we’re comparing
The six alternatives are not equivalent, but all solve the same problem from different angles: how to get an LLM to treat you as an individual, not as average user. Each puts weight in a different place: ChatGPT Memory accumulates facts; Claude Projects fixes manual context; Gemini Gems separates personas; custom GPTs encapsulate instructions; conversational profiles infer patterns; prompt templates group recipes.
AfiniTwin differentiates on one specific axis: it crystallises your profile using validated psychometric instruments and delivers it in portable format. The others do this better or worse, but none covers validation + portability simultaneously.
Dimensions that matter
We won’t compare by feature count (anyone can inflate that). The dimensions that actually change the outcome are six:
- Profile validity — does the injected material come from peer-reviewed instruments or from inferences over casual conversations?
- Portability — can I take my profile to another LLM or am I locked in?
- Mode control — can I switch the AI’s register (critic, mirror, translator) or do I just get «one tone»?
- Explicit anti-sycophancy — does the profile include instructions for the AI to push back, not just validate?
- Legal compliance — is there public AI Act + GDPR documentation or just generic «privacy policy»?
- What you get for the fee — just one AI’s personalisation system, or your portable profile included in a full subscription?
The table, no tricks
The table below declares where each alternative stands on each dimension. If one column says «yes» and another «no», that’s how it is — not because they paid to look better.
When AfiniTwin loses the comparison
Where AfiniTwin is not the best option:
- If you only use one AI (say, ChatGPT) and will never touch another: ChatGPT Memory gets you 70% of the value for free.
- If all you ask for is literal translations, summaries and boilerplate: the profile adds nothing.
- If you’re willing to invest 20-30 hours building your own Claude Project with templates: the DIY route can take you far.
Comparative table
Six dimensions × six alternatives. No make-up.
| Dimension | AfiniTwin | ChatGPT Memory | Claude Projects | Gemini Gems | Custom GPT | Conversational |
|---|---|---|---|---|---|---|
| Psychometric validity | IPIP-NEO, AAP, AHP, ATP | Opaque inference | User-written | User-written | User-written | Conversational inference |
| Portability | JSON + 6 languages + 11 platforms | Not exportable | Inside Claude only | Inside Gemini only | Inside the GPT only | Not exportable |
| Usage modes | 8 modes with trigger phrase | 1 (generic memory) | Manual per project | Manual per Gem | 1 per GPT | Inferred without control |
| Anti-sycophancy | Explicit in meta-prompt | No | Manual | No | Manual | No |
| Documented compliance | AI Act + GDPR + public DPIA | Generic policy | Generic policy | Generic policy | Generic policy | Generic policy |
| Cost | Included in afini.ai €49.99/month | €20/month | €20/month | €20/month | €20/month | €20/month + your time |
Before you start, keep in mind
- AfiniTwin does not replace your LLM subscription. You need Claude, ChatGPT, Gemini or Mistral separately. What it replaces is the «personalisation system» of each one.
- AfiniTwin updates when you recalibrate it (not automatic). If your life changes drastically, you re-run the instruments and recompile. Recompilation is included in your subscription.
- AfiniTwin doesn’t work without an external LLM. If you want a fully local offline AI, this is not for you — you need a model that respects your system prompt, and serious local models do.
Compared, decided
If the table fits, the only decision left is when. AfiniTwin is included in your afini.ai subscription, fresh every month, and you start with a 7-day trial.