From 10% of list price
On IF API, GPT, Claude, Gemini and other major models cost as little as 10% of their official list price. The same top-up goes up to 10× as far, so you can translate pages, selected text and video subtitles without keeping an eye on your balance.
Read Frog has partnered with IF API, which is now a built-in sponsored provider in Read Frog. IF API is an OpenAI-compatible model platform: one API key reaches GPT, Claude, Gemini, DeepSeek, GLM, MiniMax and more, so there's no signing up with several companies, adding a card to each, and juggling a pile of keys. Prices are public and billing is pay-as-you-go; IF API's pricing page lists each model's current price.
For Read Frog users: on top of those prices, enter the code READFROG on your first top-up after you sign up with IF API to get 10% extra credit. IF API's own page has the full terms.
It's already in your settings
Update Read Frog to 1.59.2 or later, open API Providers in settings, and IF API is there. Nothing to add by hand:
- New installs: IF API sits right below Jalapeno Cloud.
- Existing users: IF API is added to the end of your list. Your own providers and their order stay as they were.
The IF API card comes preconfigured:
- Route:
https://cn.ifapi.org/v1, IF API's mainland China route. If it's slow where you are, change the Base URL tohttps://ifapi.org/v1. The same key works on both. - Model: GPT-6 Luna, plus five more models that IF API recommends for translation (see below).
- Reasoning: off. Translation doesn't need the model to "think it over" first, so results come back faster and use fewer tokens. You can turn it back on in the card.
The six built-in models
| Model | From |
|---|---|
gpt-6-luna (default) | OpenAI |
gpt-6.1-terra | OpenAI |
claude-haiku-5-5 | Anthropic |
deepseek-v4.1-flash | DeepSeek |
glm-5.3-flash | Zhipu AI |
minimax-m3.1-flash | MiniMax |
Want a model that isn't listed? Choose a custom translate model and type in its name from IF API.
Start translating in three steps
Sign up and top up: on the IF API card, click Get API key (or open IF API's sign-up page directly) and create an account. Enter READFROG on your first top-up for 10% extra credit.
Paste your key: copy the key from the IF API console, paste it into the card's API key field, and click Test connection.
Put it to work: under Feature providers, switch Page translation, Selection toolbar translation, Video subtitles or any other feature to IF API.
Want different models for different features? Add a second IF API provider on the API Providers page and pick another model. It uses the same key. For example: a fast, low-cost model for page translation and Claude for selections.
Not just for Read Frog
IF API speaks the OpenAI API format, so the same key also works in:
- Read Frog
- Other AI agents and chat apps
- Coding tools
- Your own applications
FAQ
I already have Read Frog Pro. Do I need IF API?
No. Your built-in AI quota works as before. IF API is a good fit if you want to choose your own models, pay only for what you use, or use one key across other tools too.
Can I remove IF API if I don't want it?
Yes. Delete the IF API card on the API Providers page. Your other providers and settings are not affected.
About IF API
IF API is a model API platform that connects OpenAI, Claude, Gemini and other major models, from 10% of list price, with public prices, pay-as-you-go billing, multiple routes for reliability, and a dedicated route for mainland China.
For questions about your IF API account, top-ups or billing, contact IF API directly. If something isn't working inside Read Frog, let us know through the feedback channel in the extension.