# Chat SDK now supports concurrent message handling

By Steven Van · 2026-03-24

Chat SDK's new concurrency setting lets developers choose drop, queue, debounce, or concurrent handling for overlapping thread messages.

The [Vercel](<https://creatorstoolbox.com/tools/vercel>) Chat SDK now has a [concurrency option](<https://chat-sdk.dev/docs/concurrency>) on the Chat class, letting developers set what happens when a new message arrives on a thread before the previous one has finished processing.

- **Drop** (the default): discards the incoming message.

- **Queue**: processes the latest message once the current handler finishes.

- **Debounce**: waits for a pause in the conversation and processes only the final message.

- **Concurrent**: processes every message immediately, with no locking.

[![](<https://chat-sdk.dev/og/concurrency/image.png>)](<https://chat-sdk.dev/docs/concurrency>)

![Vercel](<https://www.google.com/s2/favicons?domain=vercel.com&sz=128>)

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Sources

[Original source](<https://chat-sdk.dev/docs/concurrency>)

[Read Chat SDK now supports concurrent message handling on Creators Toolbox](<https://creatorstoolbox.com/blog/vercel-chat-sdk-now-supports-concurrent-message-handling>)

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Canonical source: https://creatorstoolbox.com/blog/vercel-chat-sdk-now-supports-concurrent-message-handling