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Opal
Connected Papers
Ace It
Profundo
BigRead
LitGrades
NoteKnight
Chatty Tutor
Transcript Generator| Feature | Opal | Connected Papers |
|---|---|---|
| Pricing | Free | Freemium |
| Free tier | Yes | Yes |
| API | Yes | Yes |
| Open source | Yes | No |
| Platforms | Mobile App | API |
| Models | Learnopal | Connectedpapers |
| Context window | 128k | — |
| Launched | 2024 | 2025 |
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Specs
| Pricing | Free |
|---|---|
| Free tier | Yes |
| API | Yes |
| Open source | Yes |
| Platforms | Mobile App |
| Models | Learnopal |
| Context window | 128k |
| Launched | 2024 |