Rails + AI models, which to use? Claude Opus 4.5 is slightly more accurate and less expensive than Fable, although a tad slower. However, you can get essentially the same results with Kimi K3 for almost half the price. We know this because we worked with @Rails to benchmark the performance of eight AI models against 21 atomic tasks and evals. This project gave us the amazing opportunity to work hand in hand with @AmandaBPerino and the Rails Foundation on the creative task of building Rails-centric LLM benchmarking. But also, this helps move the ecosystem forward and hopefully allows the community to keep ideating with Rails. Congrats to @skryukov_dev and Artur Petrov for their work on this!

Did all Rails apps just get faster, or are we just announcing our Emerald sponsor? FastRuby.io helps companies upgrade their legacy Rails apps with zero downtime. Its team can help you improve security, pay off tech debt, and optimize your platform's performance. Talk to the FastRuby.io team at the conference.

Vica @vmelnikova_en is doing some killer work on sponsorships for @sfrubyconf 🔥

Our team is out of this world but also cute little babies.

If you're going to The Geek Gathering in Croatia tomorrow, catch Andrey's talk on what developers can learn from Soviet space program failures. Andrey is our brilliant principal frontend engineer and the author of PostCSS and NanoID. Say hi to him and see if he still has Evil Martians stickers to share.

Chris Fung (@aergonaut) found Ruby by accident and immediately knew he didn't want to write PHP anymore. Then, he joined the community and loved how welcoming and fun people were. 💙 If you want to meet a kind, smart, and fun person at the conference, find Chris in the audience and start a conversation. He's into localization, has experience working at big companies, and can help you with public speaking. Get late-bird tickets: luma.com/sfrubyconf2026

Don’t let you conference season end short! Today is the last day before ticket prices go up for @sfrubyconf. Nov 10-12 at SFJAZZ, tickets: luma.com/sfrubyconf2026

SF Ruby Conference 🚨 Today is the last day before ticket prices go up. Ruby, Rails and AI, all in one package. Gems don't rust. Nov 10-12 at SFJAZZ, tickets: luma.com/sfrubyconf2026

In a world where everyone can build apps with AI, software engineers need to build skills, harnesses, and tooling that help them make better apps. But for new builders to choose Ruby/Rails, we need to talk to each other and understand what's missing in the ecosystem. That's the whole idea behind @sfrubyconf. The talks are curated to show the tools people are working on and how big and small companies approach similar problems. We're also putting a lot of work into the experience off the main stage so people can meet each other and work to build the future of the ecosystem. ‼️ See what's in it for you at the conference and buy tickets before the price goes up tomorrow: evilmartians.com/chronicles/…

LAST DAY TO GET TICKETS AT REGULAR PRICE! We believe that to change the ecosystem, we need to have conversations. This conference is the place to meet others, have those chats, and come up with ideas for future tooling or solutions. Regular tickets are $450 today, but $500 tomorrow: luma.com/sfrubyconf2026

SF Ruby Conf is $390 today, $500 tomorrow: bring your team! Regular tickets are $390 with the code LUMASEP30 and the sale closes today. From Thursday, October 1, we have Late bird at $500. Already have a ticket? You rock! Bring your teammates. Get Regular tickets with discount today here luma.com/sfrubyconf2026?coup… Who you'll meet Apple, Shopify, Cisco, Anthropic, Fin, AWS, Persona, Gusto, Handshake, IFTTT, Workday, Zendesk, PayPal, Asana, New Relic and 37signals are among the companies coming. Networking is on the schedule, in small facilitated groups built around what you came for, hiring included. Maintainers of your gemfile: Solid Queue, RubyLLM, Archspec, Pay, Jumpstart, GoodJob, Herb, Inertia Rails, AnyCable, TestProf, Sequel, Rodauth, ViewComponent, JRuby, and many more. 

What you'll get Two days of what is working in production right now, from the teams running Ruby at scale and the founders building on it. Including how Ruby flies satellites 🛰️. Full schedule sfruby.com/#schedule Details 💎November 10 and 11 at SFJAZZ, 201 Franklin St. 💎November 11 is Veterans Day (holiday). 💎Day 1 is AI-heavy: agents in production Ruby apps, AI in legacy codebases, tooling and collaboration. 💎Day 2 is AI-light: queues, concurrency, real-time, open source. 💎November 12 is a community day and optional. See you on November 10! Before then, come and find us in the game at clouds.sfruby.com.

AppSignal is joining SF Ruby as our coffee sponsor! If you want to know, what the duck is going on with your app, @AppSignal is the tool for you. Check traces, errors, logs, and dashboards in one tool. At @evilmartians, we love AppSignal. ❤️ We know Ruby developers love AppSignal too. ❤

PRICES ARE GOING UP ON OCT 1! 🚨 This conference is about building community, discuss the future of Ruby, and learn from success stories. If you're still not ready to put your pencils down, come to SF Ruby Conference. Last two days to get tickets at regular price: luma.com/sfrubyconf2026

This Friday I will speak at The Geek Gathering in Croatia, Osijek thegeekgathering.org/schedul…

This is the final countdown: only 2 days left to get a Regular ticket for the SF Ruby Conference. Late birds are gonna be activated from Oct 1. sfruby.com/

Feeling the blues post Rails World? You still have 3 days left to get tickets at regular price. Let's meet in SF this Nov 10-12 so you can feel the warmth of community once more before the year ends. Last regular tickets: luma.com/sfrubyconf2026

SumIt is coming to SF Ruby as an Emerald sponsor! SumIt is a powerfully simple family office accounting platform powered by Ruby. We have a close relationship with the team since they were also our clients at @evilmartians. Find Alex or Fernando at the conference and chat about what SumIt can do for you!