Alex Reibman 🖇️ Profile picture
Mar 5, 2024 15 tweets 7 min read Read on X
For one day only, General Catalyst invited 20 of San Francisco’s top AI entrepreneurs to showcase what’s possible with AI.

Live product and raw code only. No pitches. No bullshit.

Here’s what we saw at the @cerebral_valley co-working demo session at @generalcatalyst (🧵): Image
1/ Entelligence

AI agent that generates execution/AST diagrams, creates code reviews, and writes pull requests

Upgrading the on-ramping process for junior engineers with AI

@Aiswarya_Sankar
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2/ Jaiqu (by @agentopsai)

Automatically generate repeatable queries for extracting data from complex JSON documents using jq query syntax

AI agent for generating DSL

Live at

@AlexReibman

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3/ Bootleg brain

Hacked-together wearable that records all your conversations and creates queryable memories

50x cheaper than existing options on the market and built in only one day
@kodjima33
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4/ “Does my insurance cover that?”

LLM that answers questions about your health insurance policy’s coverage
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5/ Shader

Generative AI for AR filters. Create face masks with any prompt and stream it live

@daryasesitskaya @shaderapp
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6/

Specialized LLM chat for executive leaders. Complete with web search + RAG for up-to-date querying on Traversaal.ai

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7/ Speed Legal

Automatically redline and identify relevant or problematic clauses in legal documents.

Grammarly for legal documents

@hanspaulp
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@AgentOpsAI check it out at github.com/AgentOps-AI/Ja…
8/ Kinesys - Cortex AI

Automatically extracts and evaluates data home reports from messy property report PDFs

AI home appraisal reports for any property.

@nemoyangeth
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9/ AI Director

Generative AI that produces scripts and storyboards for film directors

@gabor
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10/ Fixpoint

All-in-one toolkit for LLM fine-tuning and eval tracking

@dbmikus
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11/ BullsAI

Automatically tailor e-commerce copy and images based on the inferred identity or fingerprint of the visiting customer

@AshwinRathie
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12/ Recall

Connect customer interaction data to LLMs and information extraction models to identify common patterns and feedback
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That’s all for this time. Huge thanks to @generalcatalyst @AndreaShuyuWang @cerebral_valley for hosting

Want to see more AI agents and tech demos in action? I curate threads and deep-dives into the latest hacks and launches. Follow @AlexReibman @agentopsai

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More from @AlexReibman

Aug 17
MCP is now the de facto standard for LLM agents

200 developers came to NYC to compete for $10,000+ and prove what’s possible.

Here’s what we saw at the Build the Future MCP Hackathon (🧵): Image
Image
1/ Risky Business 🥉

Automated exploit Intelligence for vulnerability triage. MCP companion for SOC teams to verify and prioritize CVEs and cyber attacks
@joshdevonai
2/ Claude Code Debugger 🏅 (Editor’s choice)

An MCP for Visual Studio @Code

Connects with Claude Code to automatically debug complex problems using the native VSCode debugger (rather than just print statements and static analysis)
Read 8 tweets
Aug 12
GPT-5 is finally out.

OpenAI invited 500+ hackers to San Francisco to push it to the limit. 95 teams competed for $50,000.

Here’s what we saw at the Official GPT-5 Hackathon at @cerebral_valley @OpenAI Image
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1/ Gentoo 🥇

GPT-5 for marketing campaign simulations. Turn product ideas into simulations. And run live experiments on your store

E-commerce AI sims
@jihyuk_gentoo Image
2/ Fashion AI

Diffusion models and GPT-5 to let users style 3D avatars with AI-powered outfit recommendations.

@fashn_ai @parsakhaz
@eyal_shechtman
Read 8 tweets
May 25
300+ hackers just spent 48 hours building AI weapons and hardware to fight America’s enemies.

I’m actually worried terrorists and adversaries will see this.

Here’s what we saw at the National Security Hackathon by @NATO x @CIA x @ShieldCapVC (🧵): Image
Image
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1/ Walkie-talkie-LLM 🥉3rd place $1,000

Voice replicator that steals enemy voices and creates false commands and rumors with local LLMs

AI false flag attacks

@kirill_igum
2/ Skyfall 🥈2nd place $2,000

ML classifier that plugs into street cameras and fingerprints people based on their gait

Spy on people based on how they walk on local ML models
Read 8 tweets
Feb 18
Stanford just hosted a hackathon. Over 1000 Ivy League and elite engineering students came to build for 36 hours straight.

The reward? $200k+ in prizes.

Here are the winners and crowd standouts we saw at TreeHacks ‘25 @hackwithtrees (🧵): Image
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1/ BrailleBot - 🎖️Best Hardware Prize

Converting a 3d printer and junk material from Stanford supply closet into a $15 braille printer

@jclin22009
@cathyzbn
@ScottHickmann
@LawtonSkaling
2/ OMNOM - 🎖️ Most creative prize

End to end food ordering and delivery robot that drives to restaurants, picks up orders, and brings them home

Built from scratch with spare parts and custom aluminum

@NilsIRL
@AJobAIO
@JohnathanM62119
Image
Read 15 tweets
Feb 3
OpenAI’s biggest rival isn’t just Deepseek. It’s Google.

We invited 200+ hackers to build what’s possible with Gemini multimodal AI and generative video

Here’s what we saw at the @GoogleDeepMind MultiModal Hackathon with @AgentOpsAI @windsurf_ai at @agihouse_org (🧵): Image
Image
1/ ANIMINE - 🥇First Place $3000 GCP credits

Translate real videos into anime by combining Gemini video understanding with Veo2

Gesture-to-video

@aliceheimanxyz Image
2/ Firefly vs Veo2

Comparing the outputs of Adobe Firefly with Veo2 against the same prompts. Hilarity ensues

@dpang
Read 20 tweets
Jan 20
Saw these guys walking around Hayes looking for coworking space, so I invited them to HQ

I was not prepared. These guys are absolutely cracked.

Here’s the demos from the Swedish Hack Mafia (🧵): Image
1/ Lovable

AI agent for building + replicating websites

Agentic web app builder

@lovable_dev
2/ Rubik’s Cube CSS

3D interactive Rubik’s cube built entirely in CSS

@whosmatu
Read 5 tweets

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