Cassie Kozyrkov
@decisionleader.bsky.social
CEO, AI Advisor, Keynote Speaker, fmr Chief Decision Scientist at Google
Newsletter: decision.substack.com
Newsletter: decision.substack.com
Does AI training double worker productivity? What's your reaction to this study from Microsoft?
Follow for more.
Follow for more.
January 29, 2026 at 1:30 PM
Does AI training double worker productivity? What's your reaction to this study from Microsoft?
Follow for more.
Follow for more.
🐓🐓🐓 Calling all early birds! If you're awake enough to read this, then consider joining the rise and shine edition of my Decision-Making with ChatGPT course today.
The live Q&A with me starts in just over 2h (8 AM ET today) and the rest is on demand.
🐓 Enroll here: decisiongptcourse.com
The live Q&A with me starts in just over 2h (8 AM ET today) and the rest is on demand.
🐓 Enroll here: decisiongptcourse.com
Decision-Making with ChatGPT by Cassie Kozyrkov on Maven
Make better decisions in the Age of AI. Turn ChatGPT into your strategic thinking partner.
decisiongptcourse.com
January 22, 2026 at 10:53 AM
🐓🐓🐓 Calling all early birds! If you're awake enough to read this, then consider joining the rise and shine edition of my Decision-Making with ChatGPT course today.
The live Q&A with me starts in just over 2h (8 AM ET today) and the rest is on demand.
🐓 Enroll here: decisiongptcourse.com
The live Q&A with me starts in just over 2h (8 AM ET today) and the rest is on demand.
🐓 Enroll here: decisiongptcourse.com
Alignment beats accuracy - every time. (That’s not a metric. It’s a leadership choice.)
This is the core principle behind my Maven course, Decision-Making with ChatGPT. Cohorts 4 and 5, which both include a live Q&A with me, coming up on Jan 22 and Feb 12!
Enroll here: decisiongptcourse.com
This is the core principle behind my Maven course, Decision-Making with ChatGPT. Cohorts 4 and 5, which both include a live Q&A with me, coming up on Jan 22 and Feb 12!
Enroll here: decisiongptcourse.com
January 21, 2026 at 6:01 PM
Alignment beats accuracy - every time. (That’s not a metric. It’s a leadership choice.)
This is the core principle behind my Maven course, Decision-Making with ChatGPT. Cohorts 4 and 5, which both include a live Q&A with me, coming up on Jan 22 and Feb 12!
Enroll here: decisiongptcourse.com
This is the core principle behind my Maven course, Decision-Making with ChatGPT. Cohorts 4 and 5, which both include a live Q&A with me, coming up on Jan 22 and Feb 12!
Enroll here: decisiongptcourse.com
Most decision failures aren’t due to lack of data, they’re due to unclear judgment.
Cohort 4 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
Cohort 4 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
January 20, 2026 at 1:01 PM
Most decision failures aren’t due to lack of data, they’re due to unclear judgment.
Cohort 4 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
Cohort 4 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
So much wasted potential!
Most people use ChatGPT for emails and summaries. Forget busywork, let's focus on the things that make a real impact.
Enroll in my Decision-Making with ChatGPT course to use AI to move the needle on what matters most -- your decisions:
decisionGPTcourse.com
Most people use ChatGPT for emails and summaries. Forget busywork, let's focus on the things that make a real impact.
Enroll in my Decision-Making with ChatGPT course to use AI to move the needle on what matters most -- your decisions:
decisionGPTcourse.com
January 14, 2026 at 1:45 PM
So much wasted potential!
Most people use ChatGPT for emails and summaries. Forget busywork, let's focus on the things that make a real impact.
Enroll in my Decision-Making with ChatGPT course to use AI to move the needle on what matters most -- your decisions:
decisionGPTcourse.com
Most people use ChatGPT for emails and summaries. Forget busywork, let's focus on the things that make a real impact.
Enroll in my Decision-Making with ChatGPT course to use AI to move the needle on what matters most -- your decisions:
decisionGPTcourse.com
Who's surprised by this finding from Gartner that CEOs have less faith in their C-Level colleagues being AI-savvy in 2025/26 than they had in those same colleagues being tech savvy in 2019/20?
January 13, 2026 at 6:30 PM
Who's surprised by this finding from Gartner that CEOs have less faith in their C-Level colleagues being AI-savvy in 2025/26 than they had in those same colleagues being tech savvy in 2019/20?
The more powerful the tool, the more the human matters.
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
January 12, 2026 at 1:45 PM
The more powerful the tool, the more the human matters.
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
Since several folks have complained to me recently about ChatGPT's sycophantic tone, I figured it's time for that PSA again:
🤯 YOU CAN CHANGE CHATGPT'S TONE. 🤯
I recommend "Efficient" - that's the one I use.
Click, click, done.
🤯 YOU CAN CHANGE CHATGPT'S TONE. 🤯
I recommend "Efficient" - that's the one I use.
Click, click, done.
January 10, 2026 at 4:45 PM
Since several folks have complained to me recently about ChatGPT's sycophantic tone, I figured it's time for that PSA again:
🤯 YOU CAN CHANGE CHATGPT'S TONE. 🤯
I recommend "Efficient" - that's the one I use.
Click, click, done.
🤯 YOU CAN CHANGE CHATGPT'S TONE. 🤯
I recommend "Efficient" - that's the one I use.
Click, click, done.
Last year, 364 students in 56 cities learned from me on @Maven. Will you take one of my AI courses for leaders, aspiring leaders, and curious self-improvers this year?
The next cohort of Decision-Making with ChatGPT starts on Jan 14! Enroll at decisiongptcourse.com
The next cohort of Decision-Making with ChatGPT starts on Jan 14! Enroll at decisiongptcourse.com
January 9, 2026 at 1:45 PM
Last year, 364 students in 56 cities learned from me on @Maven. Will you take one of my AI courses for leaders, aspiring leaders, and curious self-improvers this year?
The next cohort of Decision-Making with ChatGPT starts on Jan 14! Enroll at decisiongptcourse.com
The next cohort of Decision-Making with ChatGPT starts on Jan 14! Enroll at decisiongptcourse.com
In case you missed it, NVIDIA just showed us the new Vera Rubin chip. 💪
January 6, 2026 at 4:35 PM
In case you missed it, NVIDIA just showed us the new Vera Rubin chip. 💪
Stop fighting yourself, starting winning at your self-improvement resolutions!
I have a New Year's gift for you all: an enormous compendium of all the resolutions and motivation advice I’ve ever written. Now in illustrated form
bit.ly/advancedmanual
I have a New Year's gift for you all: an enormous compendium of all the resolutions and motivation advice I’ve ever written. Now in illustrated form
bit.ly/advancedmanual
December 29, 2025 at 6:23 PM
Stop fighting yourself, starting winning at your self-improvement resolutions!
I have a New Year's gift for you all: an enormous compendium of all the resolutions and motivation advice I’ve ever written. Now in illustrated form
bit.ly/advancedmanual
I have a New Year's gift for you all: an enormous compendium of all the resolutions and motivation advice I’ve ever written. Now in illustrated form
bit.ly/advancedmanual
It’s Dec 26. In five days, millions will set resolutions fueled by holiday guilt. By February, 80% will have failed.
The mistake? Using willpower to solve a design problem. Willpower is finite; behavioral architecture is infinite.
A thread on hacking your 2026. 🧵
The mistake? Using willpower to solve a design problem. Willpower is finite; behavioral architecture is infinite.
A thread on hacking your 2026. 🧵
✨The Advanced Manual of Self-Improvement✨
Decision science tips to help you stick to your New Year’s resolutions
bit.ly
December 26, 2025 at 5:25 PM
It’s Dec 26. In five days, millions will set resolutions fueled by holiday guilt. By February, 80% will have failed.
The mistake? Using willpower to solve a design problem. Willpower is finite; behavioral architecture is infinite.
A thread on hacking your 2026. 🧵
The mistake? Using willpower to solve a design problem. Willpower is finite; behavioral architecture is infinite.
A thread on hacking your 2026. 🧵
You outgrew your teddy bear because it got boring.
AI toys don't get boring. They scale with your kid forever.
AI toys don't get boring. They scale with your kid forever.
December 24, 2025 at 4:30 PM
You outgrew your teddy bear because it got boring.
AI toys don't get boring. They scale with your kid forever.
AI toys don't get boring. They scale with your kid forever.
Did you hear the one about the AI-powered teddy bear that engaged in sex talk with kids?
Just last month, it got yanked from shelves after teaching children about kitchen knives, fire starting, and BDSM.
Maybe check what's in your kids' stocking this year.
Full story: decision.substack.com
Just last month, it got yanked from shelves after teaching children about kitchen knives, fire starting, and BDSM.
Maybe check what's in your kids' stocking this year.
Full story: decision.substack.com
December 23, 2025 at 2:48 PM
Did you hear the one about the AI-powered teddy bear that engaged in sex talk with kids?
Just last month, it got yanked from shelves after teaching children about kitchen knives, fire starting, and BDSM.
Maybe check what's in your kids' stocking this year.
Full story: decision.substack.com
Just last month, it got yanked from shelves after teaching children about kitchen knives, fire starting, and BDSM.
Maybe check what's in your kids' stocking this year.
Full story: decision.substack.com
Most decision failures aren’t due to lack of data, they’re due to unclear judgment.
Cohort 3 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
Cohort 3 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
December 17, 2025 at 8:03 PM
Most decision failures aren’t due to lack of data, they’re due to unclear judgment.
Cohort 3 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
Cohort 3 of Decision-Making with ChatGPT is now open: 👉 maven.com/cassie-kozyr...
#StrategicThinking
Microsoft’s AI agents are getting… Workday HR profiles.
Not metaphorically.
Not conceptually.
Actual HR profiles... alongside company email addresses, Teams access, and a seat next to human coworkers in the org chart.
It’s the clearest signal yet that enterprises love the rhetoric of replacement.
Not metaphorically.
Not conceptually.
Actual HR profiles... alongside company email addresses, Teams access, and a seat next to human coworkers in the org chart.
It’s the clearest signal yet that enterprises love the rhetoric of replacement.
December 17, 2025 at 1:45 PM
Microsoft’s AI agents are getting… Workday HR profiles.
Not metaphorically.
Not conceptually.
Actual HR profiles... alongside company email addresses, Teams access, and a seat next to human coworkers in the org chart.
It’s the clearest signal yet that enterprises love the rhetoric of replacement.
Not metaphorically.
Not conceptually.
Actual HR profiles... alongside company email addresses, Teams access, and a seat next to human coworkers in the org chart.
It’s the clearest signal yet that enterprises love the rhetoric of replacement.
If your priorities aren’t clear, AI won’t fix it - it’ll amplify it.
If clear thinking is your 2025 focus, Cohort 3 of DecisionGPT is now open. 👉 maven.com/cassie-kozyr...
#AI #Leadership
If clear thinking is your 2025 focus, Cohort 3 of DecisionGPT is now open. 👉 maven.com/cassie-kozyr...
#AI #Leadership
December 16, 2025 at 7:00 PM
If your priorities aren’t clear, AI won’t fix it - it’ll amplify it.
If clear thinking is your 2025 focus, Cohort 3 of DecisionGPT is now open. 👉 maven.com/cassie-kozyr...
#AI #Leadership
If clear thinking is your 2025 focus, Cohort 3 of DecisionGPT is now open. 👉 maven.com/cassie-kozyr...
#AI #Leadership
The more powerful the tool, the more the human matters.
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
December 16, 2025 at 4:02 PM
The more powerful the tool, the more the human matters.
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
AI can't replace what's most essential. Not everyone agrees. Do you?
decisiongptcourse.com
6% of business decision-makers trust AI agents while 86% plan to increase their agentic exposure — is this gap a good thing or a bad thing?
Use this exact link to scoot past the paywall on Medium: bit.ly/quaesita_tru...
Keen to join my Decision-Making with ChatGPT course? decisiongptcourse.com
Use this exact link to scoot past the paywall on Medium: bit.ly/quaesita_tru...
Keen to join my Decision-Making with ChatGPT course? decisiongptcourse.com
What Do Enterprises Trust AI Agents With?
6% trust AI agents while 86% plan to increase their agentic exposure — is this gap a good thing or a bad thing?
bit.ly
December 16, 2025 at 1:45 PM
6% of business decision-makers trust AI agents while 86% plan to increase their agentic exposure — is this gap a good thing or a bad thing?
Use this exact link to scoot past the paywall on Medium: bit.ly/quaesita_tru...
Keen to join my Decision-Making with ChatGPT course? decisiongptcourse.com
Use this exact link to scoot past the paywall on Medium: bit.ly/quaesita_tru...
Keen to join my Decision-Making with ChatGPT course? decisiongptcourse.com
👩⚖️ I'm judging the next Webby Awards, so would love to invite the creators in my network to submit your work by Friday, Dec 19.
I'm thrilled to be a part of honoring the best of the Internet, and can't wait to see this year's entries! Get your work in today at webbyawards.com.
I'm thrilled to be a part of honoring the best of the Internet, and can't wait to see this year's entries! Get your work in today at webbyawards.com.
Home
The leading international award honoring excellence on the Internet.
webbyawards.com
December 15, 2025 at 8:30 PM
👩⚖️ I'm judging the next Webby Awards, so would love to invite the creators in my network to submit your work by Friday, Dec 19.
I'm thrilled to be a part of honoring the best of the Internet, and can't wait to see this year's entries! Get your work in today at webbyawards.com.
I'm thrilled to be a part of honoring the best of the Internet, and can't wait to see this year's entries! Get your work in today at webbyawards.com.
If your favorite AI question is still “Which LLM should we use?” then please pick a better favorite!
Some candidates 🧵
Some candidates 🧵
December 15, 2025 at 1:30 PM
If your favorite AI question is still “Which LLM should we use?” then please pick a better favorite!
Some candidates 🧵
Some candidates 🧵
🎄 It's the most terrible time of the year...? 🎄
How many of these 8 #AI #headlines did you catch recently? Tell me the one you find most interesting in the comments 👇
For the curious, my newsletter digs into each one: decision.substack.com 🔗
8. McDonald’s pulls creepy AI-generated ad... 🧵
How many of these 8 #AI #headlines did you catch recently? Tell me the one you find most interesting in the comments 👇
For the curious, my newsletter digs into each one: decision.substack.com 🔗
8. McDonald’s pulls creepy AI-generated ad... 🧵
December 13, 2025 at 5:10 PM
🎄 It's the most terrible time of the year...? 🎄
How many of these 8 #AI #headlines did you catch recently? Tell me the one you find most interesting in the comments 👇
For the curious, my newsletter digs into each one: decision.substack.com 🔗
8. McDonald’s pulls creepy AI-generated ad... 🧵
How many of these 8 #AI #headlines did you catch recently? Tell me the one you find most interesting in the comments 👇
For the curious, my newsletter digs into each one: decision.substack.com 🔗
8. McDonald’s pulls creepy AI-generated ad... 🧵
Most decision failures aren’t due to lack of data - they’re due to unclear judgment.
Cohort 3 of Decision-Making with ChatGPT is now open.
👉 maven.com/cassie-kozyr...
Cohort 3 of Decision-Making with ChatGPT is now open.
👉 maven.com/cassie-kozyr...
December 12, 2025 at 1:39 PM
Most decision failures aren’t due to lack of data - they’re due to unclear judgment.
Cohort 3 of Decision-Making with ChatGPT is now open.
👉 maven.com/cassie-kozyr...
Cohort 3 of Decision-Making with ChatGPT is now open.
👉 maven.com/cassie-kozyr...
If you want AI to strengthen your judgment instead of multiplying your busywork, this is for you.
👉 maven.com/cassie-kozyr...
#DecisionIntelligence #AI
👉 maven.com/cassie-kozyr...
#DecisionIntelligence #AI
December 10, 2025 at 4:48 PM
If you want AI to strengthen your judgment instead of multiplying your busywork, this is for you.
👉 maven.com/cassie-kozyr...
#DecisionIntelligence #AI
👉 maven.com/cassie-kozyr...
#DecisionIntelligence #AI
