Updated

Block model releases

Block model announcements from October 2026 to October 2026, newest first. Compare what changed and follow the official sources.

Latest releases

Dates refer to the linked announcement or release milestone. Previews are labeled in the entries; historical availability and pricing may have changed.

Release details

  1. Block

    Dessa (research preview)

    Block introduced Dessa, a full-duplex speech model trained from scratch on human conversation, with speech input and output and no text or pretrained-model training. It is a research preview, with early access offered to a small group of AI safety researchers.

    For buildersIf you can access the preview, evaluate interruption handling, latency, and emotional nuance in a short spoken task, with human review before relying on responses.