GPT-6 Astra in Practice: Tests, Use Cases, and Feedback

The author argues OpenAI has dropped the o-series naming but, to answer Opus 5.5, may release Bel, the successor to Astra, either in full or as a preview.

The poster questions whether safety guardrails mean anything, noting that fable 5 was banned for being too risky while the more powerful GPT-6 Astra and Opus 5.5 face no such block.

A French developer paired Astra with Remotion and MCP to turn 50 seconds of generated voiceover into a concept explainer animation in about an hour, after four or five rounds of targeted fixes.

Caffeine announced support for GPT-6 Sol, saying it runs faster and costs less than GPT-6 Astra and suits the long stretch of a build spent adding features and fixing bugs round after round.

With less than 24 hours until Dev Day, the poster bets that if Astra 6.1 is strong enough, Opus 5.5 may hold the crown for only a week and push Anthropic to release Fable 5.5.

A week of testing found Opus 5.5 better at 3D assets, animation and game UI but slower and more token-hungry, while GPT-6 Astra finished 20-45 minutes earlier, used about 10x fewer thinking tokens and produced more organized scenes.

A full walkthrough video that builds a website from scratch with Astra, showing its front-end generation ability.

Given the same gameplay reference and task of rebuilding Bottle Run as a playable browser game, GPT-6 Astra xHigh took 41:35 and Claude Opus 5.5 Extra took 1:06:22.

The author vibe-coded a Three.js water scene with Astra in which a boat drifts across a harbor toward the setting sun, reusing the water feel from a previous viral swamp scene.

A Unitree G1 first explores a kitchen to build spatial memory, then GPT-6 Astra plans multi-step tasks like navigation, picking and opening drawers without task-specific training data.

A video meme joking about the poster's reaction if OpenAI releases GPT-6 Luna mini and GPT-6 Astra Minor at DevDay.

The poster rejects a claim that DeepMind will release a model outperforming Opus 5.5 and GPT-6 Astra at about half the price, calling it complete nonsense.