GPT-6 Astra: The harness matters more than you think

Prompt Engineering
23,034 views September 4, 2026

GPT-6 Astra just solved ARC-AGI 3 thanks to its native harness that preserves thinking and compaction. This video explores how to use these learning in your own harness. LINKS: https://arcprize.org/blog/astra https://openai.com/index/gpt-6-astra/ https://engineerprompt.ai/writing/ox-alpha-harness/ My voice to text App: whryte.com Website: https://engineerprompt.ai/ RAG Beyond Basics Course: https://prompt-s-site.thinkific.com/courses/rag Signup for Newsletter, localgpt: https://tally.so/r/3y9bb0 💻 Pre-configured localGPT VM: https://bit.ly/localGPT (use Code: PromptEngineering for 50% off). Signup for Newsletter, localgpt: https://tally.so/r/3y9bb0

Keyboard shortcuts

On. Switch them off if they collide with your assistive tools; ? still opens this sheet.

Go to

Press g then the letter.

  • gh Latest
  • gs Sources
  • gm Media
  • gv Videos
  • gp Podcasts
  • gc Calendar
  • gd Decoder
  • gz Dataviz
  • ga Datasets
  • gb Blog
  • gk Markets
  • gj Careers
  • gn Prompt Notebook

On this page

  • / Focus search, where there is one
  • t Back to top
  • ? This list
  • Esc Close