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

The author says Opus 5.5 performs as well as GPT-6 Astra in Minecraft while having better taste, and is looking forward to its VoxelBench results.

One user runs GPT-6-Sol-XHigh-Fast as their daily driver, GPT-6-Astra to plan and review the most complex tasks, and GPT-6-Luna-Max-Fast for cheaper, less critical work.

Tested with the same prompt, devin harness and highest reasoning settings, Opus took 2 hours 10 minutes and $75 while Astra took 1 hour 25 minutes and $61, and the author asks which did better.

A third-party legal research agent built on Astra can read over 5 million sections of law across federal, all 50 states, DC and Puerto Rico, billed pay as you go with no subscription.

The author says charts show Sol and Luna barely improve on 5.6, but API prices are half of GPT-5.6, and hopes Sol can match Astra.

A developer says they cancelled their Codex subscription because Opus 5.5 is clearly better than GPT-6 Astra for coding.

every recommends Opus 5.5 for interfaces, 3D, games and creative work, and Astra or GPT-5.6 Sol when there is a deadline or editing is needed.

After the day's releases, the poster says Opus 5.5 beats GPT-6 Astra and worries OpenAI is following Google's path of cheap, fast models, hoping DevDay and 6.1 Astra turn things around.

The author says that after adding old reports and past cases to a GPT-6 Astra agent, it began treating outdated exceptions as rules, and that removing the clutter and keeping only an index clearly reduced errors.

The poster says Opus 5.5 is in the same model class as Sol but already beats Astra, and jokes that OpenAI needs to ship Astra 6.1 soon.

Claude Opus 5.5 is priced at $4 per million input tokens and $20 per million output tokens, 40% cheaper than the previous generation, while GPT-6 Astra still leads on AutomationBench and Terminal-Bench-Science.

The author says having Astra plan and Sol execute can cut costs with only a small quality gap, but finds Sol 6 lazier and sloppier than Sol 5.6 and suspects a distillation approach.