GPT-6 Astra Hands-On: It Autonomously Built a Playable 3D RPG — With Real Limits
MattVidPro · youtube · 2026-09-09
MattVidPro publishes an in-depth GPT-6 Astra hands-on video:
- Jelly physics game: had Astra build a playable jelly-material game in Unreal Engine, solving camera, physics and level-design problems along the way. Key takeaway: specific direction matters — vague prompts degrade output sharply.
- Unsupervised 3D RPG: let Astra autonomously build a separate 3D RPG without human playtesting; impressive details but clear rough edges, illustrating the limits of autonomous development.
- Inside Codex: experience using Astra in Codex, including usage costs and computer use.
- The video ends with a verdict comparing Astra, Sol and Luna.
Links to official model docs and Codex getting-started guides included — useful for developers exploring frontier models for game development.
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