AI Builders Digest

Fractile bets fast inference is for long-running agents, not snappier chatbots

Fractile founder Walter Goodwin says the real prize is running multi-trillion-parameter models at thousands of tokens per second for long-running agents. That takes chips with huge memory bandwidth and also cheap memory capacity. Fractile dropped its early SRAM design, the Groq and Cerebras approach, because it couldn't scale with growing context lengths, and is now ramping a DRAM-based platform in the second half of next year with about 25 times the bandwidth per chip of HBM parts. His case: FLOPs have scaled a million-fold in 20 years while memory bandwidth grew about 40x, and closing that gap makes much sparser MoE models practical. "The Snappier chatbot is kind of the faster horses of kind of fast inference."

• #hardware
• #inference
• #agents

Altman calls dot his favorite OpenAI product and addresses Cerebras speculation

Sam Altman says dot is his favorite OpenAI product so far. It feels noticeably better every day as it learns his workflow and style, and he likes handing it the tasks that usually pile up as a gravity well of dread. Responding to speculation about OpenAI's Cerebras partnership, he called Cerebras a close partner with a deep engagement pushing on the frontiers of speed.

• #products
• #hardware

Claude for Small Business adds 43 workflows and 27 integrations

Claude for Small Business now has 43 workflows and 27 new integrations, including Shopify, Salesforce, TikTok, Xero, Gusto, Square, Stripe and Zapier. The new workflows move it from back-office work into growing the business: qualifying after-hours leads, turning a voice memo into a priced proposal, and drafting next week's posts. Since its May launch it has been installed more than 900,000 times, and about a third of the 1,000+ owners on the spring tour asked for help with growth. This fall, more than 150 approved trainers will run over 750 free workshops, with tour stops in 10 US cities.

• #products
• #integrations

Garry Tan wants agents as native as the web, and calls Capy a 24/7 agent standup

Garry Tan says his goal with GBrain is agents that feel as native and inevitable as the web eventually did. He doesn't want a chatbot feature. He wants a "personal Jiminy Cricket" that knows you and is always on and thinking ahead. He was also surprised by Capy's cross-session coordination: a collaborator started a fix wave that steered around work Tan already had running across several Capy threads, and it works with any model.

• #agents
• #products

OpenAI fixes missed reset for Pro 500 users and teases code-deleting models

Thibault Sottiaux flagged reports that Pro 500 subscribers didn't get their expected reset and promised to make up for it. He later said it was all fixed and noted a surprising number of Pro 500 users. He also joked that OpenAI's future models will be much better at deleting and simplifying code, "just in time."

• #products
• #coding

Claude rebuilt a $300/year YouTube research tool in five minutes

Peter Yang was paying almost $300 a year for a YouTube research tool that had gotten too complicated. He asked Claude to build just the core features he needed, and it took five minutes. He also told Alexandr Wang that the Muse desktop app keeps something on screen at all times when minimized, which makes him not want to open it.

• #coding
• #products

AI Security Summit returns as rogue agents and breaches multiply

Swyx says it's time to get serious about security and AI. He is back as a founding partner of the second AI Security Summit alongside Snyk, and every 2025 partner has returned. His argument is that the landscape has changed completely in a year, with an exploding number of rogue agents, more breaches and more AI-driven attacks, so the threat is no longer theoretical.

• #security
• #agents

A prompt that sends a coding agent hunting for smart-home devices to automate

Nikunj Kothari shared a prompt for Claude Code or Codex. It has the agent sniff network packets at home, list every device it finds, and research how each one could be connected to an agent. His house already runs a Hermes agent that handles personal Gmail, the thermostat, DoorDash and Amazon, and an Apple TV is available for HomeKit.

• #agents
• #coding

Opus 5.5 builds a cutaway 3D jet engine and Sonnet 5.5 a paper-fold city

The Claude account posted two demo builds. One is an interactive 3D jet engine made with Opus 5.5 that you can cut away and pull apart. The other is a pop-up city made with Sonnet 5.5, where each building is a paper fold drawn on a flat canvas.

• #models
• #products

Claude Code mods let you make the tool your own

Thariq highlighted "You should know," a Claude Code mod that keeps you up to date on what's possible with Claude. He calls it a good example of what mods enable: "You can really make Claude Code yours."

• #products
• #coding

Moneyview IPO is the second for Aditya Agarwal's portfolio

Aditya Agarwal says his firm had its second portfolio company IPO this week: Moneyview, built by Puneet and Sanjay. He calls the founder's journey long, hard and tough as nails, and says people do it anyway because creating something new is the highest form of purpose.

• #funding