cd /news/artificial-intelligence/ask-hn-how-do-you-know-a-prompt-is-c… · home › topics › artificial-intelligence › article
[ARTICLE · art-122641] src=news.ycombinator.com ↗ pub= topic=artificial-intelligence verified=true sentiment=· neutral

Ask HN: How do you know a prompt is "complex" for an AI model?

A Hacker News user asked how to determine when a prompt is complex enough to require a frontier AI model, citing concerns about API costs and latency. The user currently defaults to Claude Sonnet for reliability but believes smaller models like Haiku or lite open-source models could handle simpler tasks, potentially reducing expenses.

read1 min views1 publishedSep 7, 2026

| Guidelines |FAQ |Lists |API |Security |Legal |Apply to YC |Contact |

|  | **[Hacker News](news)**[new](newest) \|[past](front) \|[comments](newcomments) \|[ask](ask) \|[show](show) \|[jobs](jobs) \|[submit](submit) | [login](login?goto=item%3Fid%3D49601670) | 

|  |  | [Ask HN: How do you know a prompt is "complex" for an AI model?](item?id=49601670) |

| | | 1 point by faryadz36 minutes ago |hide |past |favorite |discuss | | | | I’m trying to balance API costs and latency in my applications. Right now, I default to frontier models (Claude Sonnet) because they are reliable, but I know I’m overpaying for tasks that smaller models (like Haiku, or lite open source models) could likely handle. |

source & further reading
news.ycombinator.com — original article Ask HN: What LLM are you using? Show HN: Send flowers from your AI agent and make your mum happy AI SEO for Startups and SaaS: A Complete Growth Strategy
── more in #artificial-intelligence 4 stories · sorted by recency
── more on @hacker news 3 stories trending now
sponsored brought to you by zahid.host 4,200+ EU-deployed projects
reading about agents? ship yours in a single git push.

Run your AI side-project on zahid.host

EU-based hosting, git-push deploys, automatic HTTPS, no cold starts. Free tier with a custom domain — perfect for shipping the agent you just read about.

$git push zahid main
→ Live at https://your-agent.zahid.host ✓
Get free account → Pricing
from €0/mo · no card required
LIVE [news/ask-hn-how-do-you-kn…] indexed:0 read:1min 2026-09-07 · —