How is Lumis different from Substack Bulletin?

Lumis synthesizes multiple AI/tech research sources (Hacker News, arXiv, The Batch, Latent Space) into a single daily briefing delivered to your inbox. Substack Bulletin focuses on Substack's answer to Beehiiv and modern newsletters. Lumis works passively — you receive your briefing each morning — while Substack Bulletin requires more active engagement.

What does Lumis cost?

Founding members lock in at $9/mo — a fraction of most comparable services. That's 499 of the first 500 founding spots remaining before pricing increases.

Does Lumis cover the same sources as Substack Bulletin?

Lumis synthesizes Hacker News, arXiv cs.AI, deeplearning.ai (The Batch), and Latent Space — the original research signals, not newsletter summaries of them. If Substack Bulletin covers these sources, Lumis brings them together into one ranked, AI-synthesized briefing.

Lumis vs Substack Bulletin

Which AI research tool saves your time? Compare features, depth, and pricing.

Feature	Lumis	Substack Bulletin
Covers original sources, not newsletter commentary	✓	✗
One briefing, multiple sources, LLM synthesis	✓	✗
Shareable /i/:slug URLs + community ranking	✓	✗
AI impact labels on every item	✓	✗
Covers Substack posts, newsletters, and platform news	✗	✓
Weekly newsletter featuring top Substack posts	✗	✓
Free for all Substack readers and writers	✗	✓

Live sample briefing

What you receive in your inbox each morning — today's actual Top 3

Today's top 3 — Lumis

Friday, October 16, 2026

risk

RealtimeBench exposes timing failures in LLM agents: correct actions arriving too late still fail

LLM agents in trading or ops can fail not from wrong answers but slow ones—current evals miss this entirely.

shift

New paper confronts benchmark saturation: what replaces leaderboards when top models all score perfectly

Benchmarks guiding AI policy are now too easy to differentiate top models, breaking the foundation for safety regulation.

signal

Goodfire agents empirically challenge polysemanticity, claim neurons are functionally clean

If neurons are cleaner than assumed, sparse autoencoder and feature-based safety tools may rest on flawed premises.

Lock founding price → See full sample

If you currently use Substack Bulletin

What changes with Lumis: Lumis brings the AI research signal upstream — HN, arXiv, The Batch, Latent Space — before it becomes newsletter content.

What Substack Bulletin does better: Substack Bulletin is Substack's own featured newsletter surfacing trending posts and platform-wide updates for Substack writers and readers.

Comparison searches are the warmest intent on the web — you're mid-evaluation, not browsing casually. Lumis is built for the researcher who wants the signal without the overhead. Lock the founding price before the first 500 spots fill.

⚡ Founding member pricing