Same spec, two AI VTuber apps: Claude Fable 5.1 vs GPT-6 Astra builds, both on MiniMax H3
Fresh_Chemistry7021 · reddit · 2026-09-08
A developer built two MIT-licensed open-source AI VTuber apps from the same specification—a chat comment becomes a video reply from an original AI character. castconjure (built with Claude Fable 5.1) targets live streaming: a pre-generated acknowledgment clip bridges the video generation wait, with a pipeline of comment → reply text + action → image-to-video from an idle frame → cache → OBS. AI OshiBloom (built with GPT-6 Astra) targets studio use: create a character, chat, and watch the spoken animated reply with the wait shown as-is. Both use MiniMax H3 via fal with bring-your-own API keys; the author discloses no sponsorship from any vendor.
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