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GLM 5.3 Hosted by Mistral

Mistral made GLM 5.3, hosted on Mistral, the default model in its Vibe Code product and web app as of September 21, 2026, according to a post from the @mistralvibe account. The hosted GLM 5.3 configuration includes a 1M context window and what Mistral described as generous limits. The post drew 46.6K views, with one reply from @UrbiGT criticizing the move as a sign Mistral can no longer produce competitive models of its own.

read1 min views2 publishedSep 21, 2026
GLM 5.3 Hosted by Mistral
Image: source

Vibe@mistralvibeGLM 5.3, hosted on Mistral, is now in Vibe Code, and the default in the web app. 1M context window and generous limits included. Happy 🛳️!3:26 PM · Sep 21, 2026·46.6KViews5545747148

Vibe@mistralvibeGLM 5.3, hosted on Mistral, is now in Vibe Code, and the default in the web app. 1M context window and generous limits included. Happy 🛳️!3:26 PM · Sep 21, 2026·46.6KViews5545747148

Urbanonymous@UrbiGT2hThis sounds like your lab can't make decent models anymore and you surrendered At least finetune it with your data and wrap it as Mistral 43301.4K

source & further reading
twitter.com — original article
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