Daily Brief
Slash Stack — September 30, 2026
A ranked daily snapshot of AI, software, systems, infrastructure, agents, blockchain, research, and tools from Discover.
Top story
Airbnb adds AI search, more social features
TechCrunch AI
Airbnb is also launching new services such as meal delivery and laundry in select locations.
What matters today
Pi.dev: You Said No MCP
Hacker News · 195 pts · 79 comments
GPT-6.1 Sol replaces GPT-6 Sol after just 7 days, with near-Astra intelligence
Hacker News · 61 pts · 74 comments
With Dazzle, Marissa Mayer bets your camera roll has more info on your life than your inbox
TechCrunch AI
Mayer argues that if a photo is worth a thousand words, your camera roll is worth millions. By analyzing all the photos stored on your phone, Dazzle claims to understand your hobbies, interests, food, and style preferences, how you like to spend their time, and with whom.
OpenAI launches GPT-6.1 Sol, says it nearly matches GPT-6 Astra and costs less
TechCrunch AI
OpenAI says GPT-6.1 Sol delivers significant improvements over GPT-6 Sol across complex professional tasks, including code writing and debugging, document understanding, and executing multistep business workflows.
GPT-6.1 Sol in GitHub Copilot
GitHub Changelog
GPT-6.1 Sol, the latest model from OpenAI, is now generally available and rolling out in GitHub Copilot. You can use it for agentic coding and terminal workflows with strong multistep… The post GPT-6.1 Sol in GitHub Copilot appeared first on The GitHub Blog .
Tools & releases
Show HN: Misanthropic – an AI that’s honest about how it feels about you
Show HN · 5 pts · 3 comments
Show HN: Interactive Diesel Price Forecaster
Show HN · 7 pts · 0 comments
Interactive model of diesel price I’ve been working on with my (sightspinner) agent. Takes into account the main (known) factors (Hormuz, Ukraine, etc.) contributing to the current spike as well as possible future scenarios. Set up for periodic updates. To view the model without the article: https://app.sightspinner.ai/share/bMO8oBg7n3hjNdyEVAs0xi2NQ7…
langchain-anthropic==1.7.5
LangChain
Changes since langchain-anthropic==1.7.4 release(anthropic): 1.7.5 ( #40912 ) fix(anthropic): support Claude Sonnet 5.5 compatibility ( #40882 ) fix(anthropic): serialize invalid tool calls as tool use on replay ( #40864 )
Research worth reading
Self-discovering RL in the Era of Experience: Is Learning History an Asset or a Burden?
arXiv cs.AI
arXiv:2609.35897v1 Announce Type: new Abstract: The pursuit of recursive self-improvement (RSI) toward general intelligence is divided between macro-level language model scaling and the interaction-driven principles of “Era of Experience”. Yet, any self-improving architecture ultimately rests upon its underlying optimization engine: if general intelligence requires learning from grounded interaction, the reinforcement learning (RL) update rule itself must be capable of cumulative adaptation. While algorithm self-discovery has produced Disco103 that surpassed PPO to achieve SOTA benchmark performance – its internal update machinery remains an…
SMat-Attention: Structured Long-Context Sequence Modeling
arXiv cs.AI
arXiv:2609.36062v1 Announce Type: new Abstract: Long-context sequence models face a fundamental tradeoff: softmax attention uses flexible token-level interactions at quadratic cost, whereas linear attention obtains linear-time training and constant-time decoding by compressing history into a fixed-size state. In this work, we ask whether we can connect these regimes through a tunable notion of structure. To this end, we introduce Structured Matrix Attention (SMat-Attention) via a family of causal masks with structured long-range routing whose row supports have VC-dimension $d$. In our construction, $d=1$ recovers the standard causal mask, and…
Introducing Quine: An AI research system designed for the complexity of biology
Microsoft Research
Biology doesn’t operate in silos, and neither should the AI representation of it. Quine is an early-stage research effort to create a multimodal world model of biology. By connecting insights across biological scales and modalities, Quine helps scientists computationally search a space far larger than intuition allows and prioritize hypotheses before they reach the lab. Experimental results provide important feedback, helping researchers sharpen future research directions. The post Introducing Quine: An AI research system designed for the complexity of biology appeared first on Microsoft Research .
How Diffusion Controller unifies and simplifies AI image generation
Google Research
Algorithms & Theory
Articles
“We’re not going to shoot ourselves in the foot” over hack fallout, says OpenAI’s chief research officer
MIT Technology Review AI
Two months after the bombshell news that a swarm of its agents had broken their containment and hacked into the computers of the AI company Hugging Face, OpenAI is still putting out fires. A steady drip of disclosures about other hacks in the weeks since has kept OpenAI in the spotlight and raised serious questions…
How Condé Nast built multimodal video discovery with Amazon Bedrock
AWS Machine Learning
Condé Nast’s editorial teams spent an average of 250 minutes per task searching a library of more than 140,000 videos using only titles and descriptions. Working with the AWS Generative AI Innovation Center, they built a multimodal video discovery solution on Amazon Bedrock and Amazon OpenSearch Service that cut discovery time to under 2 minutes.
We tested our own WAF with frontier AI models. Here’s what we found
Cloudflare Blog
We built a WAF tester that adapted each request based on what the WAF blocked or passed. This helped us explore variations that a fixed test might miss. We ran it across six attack categories on an authorized staging environment and discovered detection gaps worth fixing. Here’s how the loop worked, what got through, and what we did about it.
Hacker News signal
Introducing GPT-6.1 Sol
OpenAI · 983 pts · 859 comments
Meet GPT-6.1 Sol: near-Astra intelligence for coding, computer use, and professional work at one-fifth of Astra’s standard API input and output token prices.
A Privacy Analysis of Web and Mobile Conversational AI Agents [pdf]
Hacker News · 419 pts · 135 comments
ChatGPT Pro 500
OpenAI · 210 pts · 244 comments
Pi.dev: You Said No MCP
Hacker News · 195 pts · 79 comments
GPT-6.1 Sol replaces GPT-6 Sol after just 7 days, with near-Astra intelligence
Hacker News · 61 pts · 74 comments
This snapshot is generated automatically from the Discover ranking pipeline. It is a selection layer, not original reporting or AI-generated analysis.