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CEO @with_cortex | Building systems for AI to understand us beyond prompts

Palo Alto, California
Joined November 2019
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Sunday night is when I check which of my agents actually finished what I gave them on Friday 馃槀
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73% of consumer ChatGPT messages were non-work by June 2025, up from 53% a year earlier (OpenAI + NBER paper). Pretty much why I care so much about personal agents
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51% of adults 50+ used a voice assistant like Alexa or Siri last year, and 80% of them say it helps them live independently at home (U Michigan poll). Makes sense, saying it out loud is a lot easier than learning a new app
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Speech to text keeps getting better. Best model on Artificial Analysis now gets 1.7% of words wrong, Whisper Large v2 is at 4.1%. Kinda love that a realtime model is on top
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Hot take: Medicare open enrollment is a better benchmark for personal agents than most evals out there
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Best weekend use of a personal agent is sitting on hold with the insurance company so you don't have to lol
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The average worker gets 153 Teams messages a weekday on top of 117 emails a day (Microsoft Work Trend Index). All I want is an agent that tells me which ones actually need me lol
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AI use among Americans 50+ went from 9% to 18% to 30% in two years per AARP. Honestly way faster than I would've guessed
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Voice agents now resolve 74.5% of simulated support calls 馃憖 GPT-Live-1 on 蟿-Voice, up from 27.9% for GPT-4o Realtime in Dec 2024
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Hot take: the first personal agent most parents actually use will be a phone number they can call, not an app
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Been thinking a lot about how my agent has better calendar discipline than me and honestly it's a little humbling 馃槀
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Only 23% of Americans 65+ use AI chatbots vs 66% of 18 to 29 year olds (Pew, Feb 2026). I don't think older adults are the problem, I think chatbots still take too much learning 馃
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Been thinking a lot about why voice is the real interface for agents. Talking is 2.93x faster than typing (153 vs 52 wpm), our thumbs were the bottleneck all along
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AI agents now take on tasks longer than a workday 馃憖 Claude Opus 4.6 is at a 12.0 hr time horizon on METR, GPT-4 was at 4.0 min in 2023
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Hot take: the voice agent that wins won't be the smartest one, it'll be the one that never makes you repeat yourself
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In the middle of wiring up a voice agent and the hardest feature so far is knowing when to shut up lol
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Agents are now better than us at using a computer 馃憖 Claude Fable 5 clears 85.96% of OSWorld tasks vs 72.36% for humans, next boss fight is the hour-long workflows
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Realtime AI is about to make "let me get back to you" sound as dated as "let me fax that over" 馃槀
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Every agent demo books a flight. Still waiting for the one that tells me to skip the meeting lol
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Hot take: the best personal agent is the one you forget is running until it quietly saves your afternoon 馃槈
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