# What's New in Apollo Client 4.2

DevFeed: [What's New in Apollo Client 4.2](<https://devfeed.tech/articles/what-s-new-in-apollo-client-4-2-23586.md>)

Original publisher: [Read original article](<https://www.apollographql.com/blog/whats-new-in-apollo-client-4-2>)

Author: Jerel Miller

Published: 2026-05-27T11:33:11Z

Content type: release

Language: en

Sources: [Apollo Blog](<https://devfeed.tech/sources/apollo-blog.md>)

Topics: [apollo-client](<https://devfeed.tech/topics/apollo-client.md>), [TypeScript](<https://devfeed.tech/topics/typescript.md>), [React Hooks](<https://devfeed.tech/topics/react-hooks.md>), [browser](<https://devfeed.tech/topics/browser.md>)

Tags: [announce](<https://devfeed.tech/tags/announce.md>), [announcement](<https://devfeed.tech/tags/announcement.md>), [apollo-client](<https://devfeed.tech/tags/apollo-client.md>), [browser](<https://devfeed.tech/tags/browser.md>), [react-hooks](<https://devfeed.tech/tags/react-hooks.md>), [release](<https://devfeed.tech/tags/release.md>), [typescript](<https://devfeed.tech/tags/typescript.md>)

## AI overview

Apollo Client 4.2 introduces type-safe default options and event-based refetching. The release also deprecates generic arguments in hooks and core APIs to support the new type-safety model.

## Source excerpt

Discover Apollo Client 4.2's type-safe default options and event-based refetching. Eliminate type mismatches and automatically refetch on window focus. Learn how.