AINewsnow

I shrank a 4,000 token system prompt to 300

My system prompt swelled to four thousand tokens because the model kept losing the thread and every fresh project ended the same way, with me adding yet another paragraph of scaffolding. a system prompt is a constant so it repeats identically on turn one and turn two hundred, which leaves it able t…

Read the full story at r/PromptEngineering ↗

Timeline · 1 report

  1. 2026-09-29 14:46 · r/PromptEngineering
    I shrank a 4,000 token system prompt to 300

More stories

  1. NVIDIA Open Agent Safety Platform: A Reference for Continuous In-Silicon Agent Monitoring — NVIDIA Technical Blog
  2. Live from OpenAI DevDay 2026: Keynote — OpenAI YouTube
  3. OpenAI launches Dots, always-on agents powered by GPT-6 Astra with their own cloud computer, in ChatGPT for Pro, Business Premium, and Enterprise users (Rachel Metz/Bloomberg) — Techmeme
  4. OpenAI pauses AI training, launches ‘extensive’ review after multiple rogue agent incidents — Mint AI
  5. Anthropic warns of ‘existential risks to humanity’ in IPO prospectus — Financial Times AI
  6. How we found 24 Android vulnerabilities using our open source AI security agent — GitHub Blog
  7. Introducing Claude Sonnet 5.5 on AWS — AWS Machine Learning Blog
  8. OpenAI Scraps Release of New AI Model Over Safety Concerns — Wall Street Journal Technology

Get the daily brief of stories like this at 6:30 every morning →