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system prompt

also referred to as: system prompts

6 statements across 4 episodes · 3 bullish · 0 bearish · 5 people on the record · first statement May 23, 2025 by Tom Blomfield · across every show →

Everything said about system prompt, oldest first

May 23, 2025 bullish
Prediction Not checkable as stated
Blomfield: In 5 years, 99% of people won't touch their system prompts
“But I, I'd suggest, I think in In five years, for 99% of people, they're not touching their system prompt, but the system prompt is custom to them.”
Tom Blomfield May 23, 2025 ▶ 24:11 How To Design Better AI Apps · Y Combinator
May 23, 2025 positive
Insight
Koomen: Editable system prompts remove repetitive prompting for AI
“By editing this system prompt, I'm able to explain to the AI model how I write emails in general, so that I don't have to do it every single time.”
Pete Koomen May 23, 2025 ▶ 9:03 How To Design Better AI Apps · Y Combinator
May 30, 2025 neutral
Insight
Diana Hu outlines emerging multi-tier prompt architecture for AI agents
“So there's this concept of defining the prompt in the system prompt, then there's the developer prompt, and then there's the user prompt. So what this mean is the system prompt is basically almost like defining sort of the high level API of how your company op…”
Diana Hu May 30, 2025 ▶ 5:00 State-Of-The-Art Prompting For AI Agents · Y Combinator
Sep 30, 2025
Insight
Joseph: Training safety into models is more robust than using system prompts
“I think you get different amounts of robustness if it's trained into the model versus if it's in a prompt that you can, like, add or remove or tell, like, ignore all previous instructions, that sort of thing.”
Nick Joseph Sep 30, 2025 ▶ 43:17 Anthropic Head of Pretraining on Scaling Laws, Compute, and the Future of AI · Y Combinator
Jul 27, 2026 positive
Insight
Cherny: Only Add System Prompt Instructions When Models Repeatedly Stumble
“The thing that you want to do is you want to run it. And if it's like a custom agentic product that you're building, you want to kind of run the products. You want to see where it fails with the model. You want to see what it does well. If you're using quad co…”
Boris Cherny Jul 27, 2026 ▶ 7:55 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
Jul 27, 2026
Assertion Not checkable as stated
Cherny: Claude Is More Intelligent Without System Prompts
“And what's interesting is that the model is actually a little bit more intelligent without these prompts. That's something that we've been finding.”
Boris Cherny Jul 27, 2026 ▶ 5:06 Boris Cherny: We Cut 80% of Claude Code’s Prompt · Y Combinator
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