The opt-out exists. The permission is switched on by default
Twitch has added a setting that stops channel content from being used to train Amazon's generative models. The news arrived in a rather revealing way: Twitch Support announced the opt-out, confirming in the process that permission had been enabled by default.
The list goes well beyond whatever a streamer says on camera. It covers the live broadcast, its chat, VODs, clips, highlights and any text or images published on the channel. There is some fine print too: if you post in somebody else's chat, that channel's choice applies, not yours.
Twitch insists that Twitch itself is not training these models; Amazon is. That distinction may matter on an organisation chart, but it changes very little for creators whose voice, face and community conversations can help improve systems that generate text, audio, images or video inside the company that bought Twitch in 2014.

How to stop Twitch using your content for AI training
Open Twitch, select your profile picture and go to *Settings → Security and Privacy. Scroll down to Training for Generative AI* and switch it off. Twitch's official account help page says the change prevents that channel content from being used in future training.
This does not disable every AI feature on Twitch. The platform may still process data for automatic captions, moderation and safety tools. The difference is that those systems should not retain your channel to teach a model how to generate new content.
Twitch chief product officer Mike Minton offered an almost comically honest explanation for making it the default: if it were opt-in, nobody would opt in. As we saw in the copyright fight over training ChatGPT on news, the legality of training on published work is still being decided country by country. Twitch presents a more immediate problem: you can switch off training for your own channel, but if you type in somebody else's chat, you have to hope that streamer found the same toggle.
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