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

A user in Finland says he made a photorealistic 3D model of his home with GPT-6 Astra despite having no prior 3D graphics experience, and paired it with an online tour page.

He moved routine subagent tasks to DeepSeek V4.1-flash on the $10 opencode plan, while GPT-6 Astra directs the project and Sol handles implementation, doubling his $200/mo Codex usage limits.

Citing Artificial Analysis data, he points out that GPT 5.6 Luna costs 30% less than DeepSeek V4.1 with a close intelligence index (38 vs 40), while Fable 5.1 and Astra both score 53 and are expensive for good reason.

Covers computer-use habits, Codex usage differences, rework risk when mixing models, and advice on splitting coding and 3D work.

A French-language post claims Astra's training used 100,000+ GPUs and speculates models will scale 10x by 2028.

Characters generated in Tripo and rigged with Mixamo, then Astra built an island and gave each NPC a different job and interactions.

A list of models released this month, including GPT-6 Astra and Astra Pro alongside Claude, Gemini, Qwen, DeepSeek and a dozen others.

Code Arena plots each top lab's highest-scoring model over time, showing the leading score rose 340 points in a year and the frontier field grew from 6 to 10 labs.

The poster says a single prompt to ChatGPT 6 Astra generated a GTA-like game with anime characters, cops and cities in 20 minutes, while they were playing Fortnite.

An unverified post claims Gemini 4 has finished training and will outperform all frontier models from OpenAI and Anthropic, including GPT-6 Astra and Fable 5.1.

The poster argues Fable and Opus feel cheaper and better to use than Astra and Sol, so Claude's usage experience has overtaken OpenAI's.

A user connected ChatGPT Astra to the Descript and vidIQ MCPs to find outlier topics, spot positioning gaps, set brand guidelines, and edit full videos.