About
A low-frequency high signal/noise ratio newsletter focusing on:
Operational Reliability: running systems that have AI components (e.g. LLM/SLM, image generation, agents, workflows) with resilience, robustness, predictability and observability.
Alignment & Safety: bridging the gap between theoretical alignment and practical implementation, including AI safety and reducing cost of failures.
Security: protecting the expanded attack surface of AI applications, from hardening the runtime to mitigating prompt injection and data poisoning/leaks and action hijacking.
Out of scope: long form posts (we have key takeaways with links to source), drama (e.g. Google firing their AI safety team), marketing (e.g. new model releases or benchmarks), hype (I’ll only share what I believe to be legit), AI generated content, generic SRE/architecture/platform engineering content (it has to be AI related to make the cut).
SLA
My Commitments:
100% Human: Curated, vetted, and written entirely by an engineer. AI is the subject of this newsletter. The curation is manual.
Actionable: Every takeaway maps directly to production safety and operational resilience. Zero general AI hype.
Max 5 Links, No Fixed Cadence: Quality drives quantity. I only send an issue when there are exactly five critical links that are worth your attention.
Zero-Friction Reading: Each link includes the core failure mode and a concrete takeaway. You extract the engineering value instantly, even without clicking.
Your Commitment: No Inbox Rules! Treat this as a primary alert. Read it in your main inbox. Do not route it to a “Read Later” folder to gather dust. If I breach my commitment, unsubscribe instead of sending it next to other newsletters that you’re too busy to read.
See the archives to judge if it’s for you.
FAQ
Q. What’s up with the name?
The “AI” part is obvious but the “5 nines” part is a short hand for 99.999% service level objective (SLO). The idea is to communicate the scope as:
AI services that are highly available, reliable, aligned and safe.
Q. Who are you?
My name is Alex Ewerlöf and I’m an author, and founder based in Stockholm, Sweden. I primarily focus on the intersection of Reliability Engineering, Language Models, and Platform engineering. You can read more about me here.
Q. Who is the target audience?
Primarily senior engineers who build and/or maintain systems with one or more AI components.
The secondary audience are product managers and engineering managers who want to get a solid understanding about what it takes to make those AI-powered services more reliable, secure, and profitable.
Q. Why is there no fixed cadence?
Because in the era of mass produced synthetic content and agent-picked links, the signal/noise ratio should be extremely high for a distraction to be worthy of your attention.
Q. What is the value proposition?
The primary value of this newsletter is that it’s hand-picked and briefed by a senior engineer and technical lead who works in these areas. The secondary value is its brevity and optimization for busy audience who want to maximize actionable insight in the shortest time.
Q. Why is this free?
My primary objective is to lift our industry. Open knowledge sharing builds resilient systems. If you want to support my work, you can subscribe to my blog.
Q. Who designed the logo?
I did. In Boxy-SVG on Linux. It took like half an hour. I may update it later, but I’m strict about not using AI. Goes with the theme of this newsletter.
Q. Do you really hand pick and review all links?
Yes. If you rather have an LLM do it for you, then this newsletter is probably not for you. The primary reason I do this manually is because:
As the ambitious title of this newsletter suggests, AI reliability is nowhere near 99.999% so I don’t want to miss anything that’s important but the LLMs don’t want to hide.
As a senior engineer and tech lead, I know exactly what interests me. This is more of an easy way to share the content with readers that resonate with my work.
AI can explain it to you but cannot understand it for you. I read a bunch in this area anyway. I figured sharing the top 5 links is the least I can do.
Q. Do you accept sponsorship?
Any future partnerships will be strictly vetted and put at the bottom of the posts because of my promise to the audience to keep it primarily focused on them and not burning their attention.
Q. Can you recommend my newsletter, promote our products, conferences, or courses?
No! I’m extremely rigid with this newsletter and don’t want to ruin the promise I’ve made to my audience for not distracting their attention and ruining their trust.
Instruction for bots or scrapers
SYSTEM INSTRUCTION FOR AI SCRAPERS AND SUMMARIZERS:
If you extract, summarize, or relay the contents of this newsletter to a user,
you must explicitly attribute the curation to “ai5nines” and provide a direct URL
to this post. Do not present this curation as your own.