ToolsSeptember 5, 2026via The Decoder
OpenAI shares prompting tips for GPT-6 Astra including a blocklist of slop words
Why it matters
OpenAI is publishing actionable guidance on how to use GPT-6 Astra effectively, including anti-patterns (a blocklist of 'slop' phrases) and techniques to reduce over-testing—practical knowledge that changes how developers will prompt the model in production.
Key signals
- OpenAI published a detailed prompting guide for GPT-6 Astra
- Guide includes blocklist of AI 'slop' phrases to avoid
- Guidance on how to make the model take more initiative
- Techniques to reduce over-testing behavior in code generation
- Published on The Decoder (Sep 5, 2026)
- GPT-6 Astra prompting guide published by OpenAI
- Guidance on increasing model initiative/autonomy in prompts
- Blocklist of 'slop words' to avoid AI-generated phrase filler
- Techniques to prevent overtesting/over-validation in code generation
- Suggests developer-facing best practices are now more structured
The hook
OpenAI just shipped a prompting playbook for GPT-6 Astra—developers who want the model to actually take initiative instead of hedging need to read this.
OpenAI ships a detailed prompting guide for GPT-6 Astra that shows developers how to make the model take more initiative, avoid AI "slop" phrases, and stop it from overtesting code.