We have upgraded Read Frog's Built-in AI to GPT-6 Luna. You do not need to change a provider, add an API key, or update your settings. The upgrade is available wherever your plan includes Built-in AI.
What changes when you translate?
The new model gives Read Frog more room to follow the context of a passage, preserve its tone, and keep terms consistent across longer text. That matters when a page moves between short UI labels, technical explanations, and natural conversation. Translation quality still depends on the source and language pair, so you can always compare the result with another provider in Translation Hub.
There is a practical benefit too: Ultra's weekly Built-in AI allowance can now translate about twice as much content as before for comparable requests. The weekly allowance is still shared across Built-in AI features. Actual usage varies with page length, language pair, and the tokens needed to produce the result.
What is included with Pro and Ultra?
| Pro | Ultra | |
|---|---|---|
| Built-in AI for Custom AI Actions | Included | Included |
| Built-in AI for page and selection translation | Requires Ultra | Included |
| Built-in AI across other supported features | Requires Ultra | Included |
| AI video transcription subtitles | 300 minutes per month | 1,000 minutes per month |
Pro keeps Built-in AI for Custom AI Actions, plus its existing note, flashcard, and subtitle benefits. Built-in AI page and selection translation remain part of Ultra.
Ultra includes everything in Pro and access to GPT-6 Luna for Built-in AI translation and the other supported Built-in AI features. Under comparable usage, its weekly allowance can now cover about 2× as much translated content.
If you use your own AI provider and API key, your provider settings are unchanged. This announcement applies to Read Frog's Built-in AI.
Written by
Read Frog Team
At
Wed Sep 23 2026