Chatgpt.js vs CastReader: Which is Better in 2026?
We've compared 2 tools across pricing, features, ratings, and reviews to help you make an informed decision. No paid placements — just facts.
Compare different tools →| Feature |  Chatgpt.js Developer Tools |  CastReader Browser Extensions |
|---|---|---|
| Rating | No reviews yet | No reviews yet |
| Pricing | — |
as of Oct 23, 2026 |
| Pricing Model | Free | Freemium |
| Free Plan | ||
| Free Trial | ||
| API Available | ||
| Verified | ||
| Founded | 2023 | — |
| HQ | — | — |
| Team Size | — | — |
| Platforms | — | ChromeEdgeFirefoxSafari+4 more |
| Top Integrations | ChatGPTjsDelivrnpm | — |
| Key Features |
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| Description | chatgpt.js is a free, open-source client-side JavaScript library (plus an interactive CLI) that lets developers programmatically interact with the ChatGPT web interface and DOM without wrestling with the underlying markup. It's aimed at developers building browser extensions, userscripts, and web integrations, and it's known for being lightweight, object-oriented, and ultra-flexible — the same function can be called multiple ways (e.g. chatgpt.getLastResponse() or chatgpt.response.getLast()). What sets it apart from raw API wrappers is that it drives the existing ChatGPT UI directly, powering practical helpers like auto-continuing cut-off responses, keeping sessions fresh past time limits, and sentiment analysis. | CastReader is a text-to-speech reader available as browser extensions and mobile and desktop apps. It reads webpages, PDFs, Kindle books and AI chatbot answers aloud with synced highlighting. |