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

A user says Claude Opus is beginning to refuse decompilation requests, while GPT-6 Astra will do it without needing Daybreak access.

The author argues Anthropic only moves fast under OpenAI pressure, so they hope for a new OpenAI model next week to force out Fable 5.5.

A Japanese post says the ~3T-parameter open-weights Kimi K3.1 Pro tops GPT-6 Astra on Terminal-Bench 4.0 and leads in finance and business, with release planned by Nov 4.

On the same prompt Opus 5.5 wins on water physics while Astra adds detail like the rocket rollout and liftoff camera, at $37.96 versus Opus's $23.51 in API cost.

The author collected demos built with Opus 5.5, GPT-6 Astra and other models into a single page for inspiration or browsing.

The author claims GPT-6.1 Astra, meant as OpenAI's comeback, was quietly scrapped and replaced by 6.1 Sol, as if OpenAI took Amodei's 'slow down' talk seriously.

A shared prompt tells Codex/GPT-6 Astra to research the last five days of infosec news and then fix security issues on an SSH-connected server, noting Claude Code may be blocked by its classifier.

Given the same single-file HTML prompt, GPT-6 Astra finished fastest at 40 minutes for about $20.76, versus Kimi at 25 minutes for $3 and DeepSeek at 2 hours for $0.9.

A list of 10 GitHub repos plus a git bisect workflow for using GPT-6 Astra or Claude Code to trace regressions and verify patches.

Knowing nothing about embryos, the author used GPT-6 Astra to build a 3D Human Embryo Explorer for the Virtual Embryo Challenge that can be spun and pulled apart.

The author built several sites with Codex and GPT-6 Astra, finding visuals and hand-drawn logos stronger but translation skipping passages and coding detail still behind Claude Opus 5.5.

Citing Artificial Analysis, the author compares Opus 5.5 (61.7, $11.42), GPT-6 Astra (54.7, $7.04) and GPT-6.1 Sol (54.1, $1.50), splitting parallel chores to Sol and key work to Opus 5.5.