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

On a 6-DOF orbital rendezvous simulation task, Astra finished in 43 minutes with 92.6 points, while Fable 5.1 took 1 hour 14 minutes and scored 81.4.

The author notes Astra tends to over-test small changes and suggests specifying acceptance criteria, what should stay untouched, and when to deliver upfront.

GPT-6 Astra took first place on the voxel and spatial reasoning benchmark with 2620 Elo, 328 points ahead of Opus and about 400 above GPT-5.5 Pro in April.

A 21-rule prompt that makes Astra act as the repository's engineering owner to cut rework and unnecessary coordination.

A Plus user says a single GPT-6 Astra task at medium effort used up the entire 5-hour session limit before finishing, and advises starting at low effort.

A demo shows Astra turning a schematic into a production-ready PCB layout with component placement and routing in KiCad, though stackup, copper thickness and impedance still need human review.

The author says a single prompt had Astra build an interactive grass simulation that runs in the browser, taking 26 minutes and 6% of the weekly usage limit.

A ChatGPT Plus user reports that GPT-6 Astra Extra High exhausted the full 5-hour limit, 25% of the weekly quota, after two completed prompts and one interrupted one.

A long post breaks down Astra's capabilities, prompting guidance, agent workflows and coding improvements, focusing on how to use it rather than on benchmark scores.

A retold thread says Astra moves beyond text-in, text-out to browsing, clicking, filling forms and running multi-step workflows on its own, and lists scores such as FrontierMath and ARC-AGI-3.

Hermes merged 17 PRs this round, including selectable Astra and Astra Pro standard/fast/flex tiers on Nous Portal and OpenRouter.

A test found that a ChatGPT Pro 20x weekly quota works out to about $1,500 without long-context charges, contradicting Tibo's claim that long context is not billed extra.