GPT-5 and Agents Breakdown – w/ OpenAI Researchers Isa Fulford & Christina Kim

GPT-5 and Agents Breakdown – w/ OpenAI Researchers Isa Fulford & Christina Kim

ChatGPT-5 just launched, marking a major milestone for OpenAI and the entire AI ecosystem.

Fresh off the live stream, Erik Torenberg was joined in the studio by three people who played key roles in making this model a reality:

  • Christina Kim, Researcher at OpenAI, who leads the core models team on post-training
  • Isa Fulford, Researcher at OpenAI, who leads deep research and the ChatGPT agent team on post-training
  • Sarah Wang, General Partner at a16z, who helped lead our investment in OpenAI since 2021

They discuss what’s actually new in ChatGPT-5—from major leaps in reasoning, coding, and creative writing to meaningful improvements in trustworthiness, behavior, and post-training techniques.

We also discuss:

  • How GPT-5 was trained, including RL environments and why data quality matters more than ever
  • The shift toward agentic workflows—what “agents” really are, why async matters, and how it’s empowering a new golden age of the “ideas guy”
  • What GPT-5 means for builders, startups, and the broader AI ecosystem going forward

Whether you're an AI researcher, founder, or curious user, this is the deep-dive conversation you won't want to miss.

Timecodes:

0:00 ChatGPT Origins

1:57 Model Capabilities & Coding Improvements

4:00 Model Behaviors & Sycophancy

6:15 Usage, Pricing & Startup Opportunities

8:03 Broader Impact & AGI Discourse

16:56 Creative Writing & Model Progress

32:37 Training, Data & Reflections

36:21 Company Growth & Culture

41:39 Closing Thoughts & Mission

Resources

Find Christina on X: https://x.com/christinahkim

Find Isa on X: https://x.com/isafulf

Find Sarah on X: https://x.com/sarahdingwang

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Follow our host: https://x.com/eriktorenberg

Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures

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Follow our host: https://twitter.com/eriktorenberg

Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.


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Building a Thriving AI Ecosystem with Lisa Su

Building a Thriving AI Ecosystem with Lisa Su

Lisa Su has transformed AMD into a global leader in AI and high-performance computing.In this episode of the AI Revolution (AIR) series , Bob Swan, a16z Operating Partner and former CEO of Intel, sits down with Lisa Su, CEO of AMD, to discuss how her leadership has propelled AMD’s growth and positioned the company at the forefront of AI innovation.They explore AMD’s pivotal role in democratizing the benefits of gen AI, the evolution of AI computing, and the importance of open ecosystems and partnerships in driving technological breakthroughs.Resources: Find Lisa on X: https://x.com/lisasuFind Bob on X: https://x.com/bobswanStay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

17 Loka 202430min

The Deepfake Dilemma: The Technology, Policy, and Economy

The Deepfake Dilemma: The Technology, Policy, and Economy

Deepfakes—AI-generated fake videos and voices—have become a widespread concern across politics, social media, and more. As they become easier to create, the threat grows. But so do the tools to detect them.In this episode, Vijay Balasubramaniyan, cofounder and CEO of Pindrop, joins a16z’s Martin Casado to discuss how deepfakes work, how easily they can be made, and what defenses we have. They’ll also explore the role of policy and regulation in this rapidly changing space.Have we lost control of the truth? Listen to find out.Resources:Find Vijay on Twitter: https://x.com/vijay_voiceFind Martin on Twitter: https://x.com/martin_casadoStay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

11 Loka 202434min

A Big Week in Tech: NotebookLM, OpenAI’s Speech API, & Custom Audio

A Big Week in Tech: NotebookLM, OpenAI’s Speech API, & Custom Audio

Last week was another big week in technology. Google’s NotebookLM introduced its Audio Overview feature, enabling users to create customizable podcasts in over 35 languages. OpenAI followed with their real-time speech-to-speech API, making voice integration easier for developers, while Pika’s 1.5 model made waves in the AI world.In this episode, we chat with the a16z Consumer team—Anish Acharya, Olivia Moore, and Bryan Kim—about the rise of voice technology, the latest AI breakthroughs, and what it takes to capture attention in 2024. Anish shares why he believes this could finally be the year of voice tech. Resources: Find Olivia on Twitter: https://x.com/omooretweetsFind Anish on Twitter: https://x.com/illscienceFind Bryan on Twitter: https://x.com/kirbyman01 Stay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

8 Loka 202432min

From Swipe to Scale: How Tinder Became #1

From Swipe to Scale: How Tinder Became #1

In 1995, just 2% of couples met online. Today, that number has surged to over 50%, making online dating the top way couples connect.In this episode, a16z General Partner Andrew Chen chats with Tinder founder Sean Rad about how he built an app that changed culture. Sean shares why seamless experiences matter, how startups often get marketing wrong, and how Tinder became the catalyst for online dating's explosive growth.This conversation was recorded live in LA at a16z’s Games third Speedrun program. Learn more about Speedrun: https://a16z.com/games/speedrun/Find Sean on Twitter: https://x.com/seanradFind Andrew on Twitter: https://x.com/andrewchenStay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

3 Loka 202428min

Human Data is Key to AI: Alex Wang from Scale AI

Human Data is Key to AI: Alex Wang from Scale AI

What if the key to unlocking AI's full potential lies not just in algorithms or compute, but in data? In this episode, a16z General Partner David George sits down with Alex Wang, founder and CEO of Scale AI, to discuss the crucial role of "frontier data" in advancing artificial intelligence. From fueling breakthroughs with complex datasets to navigating the challenges of scaling AI models, Alex shares his insights on the current state of the industry and his forecast on the road to AGI. Resources: Find Alex on Twitter: https://x.com/alexandr_wangFind David on Twitter : https://x.com/DavidGeorge83 Stay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

24 Syys 202430min

The Frontier of Spatial Intelligence with Fei-Fei Li

The Frontier of Spatial Intelligence with Fei-Fei Li

Fei-Fei Li and Justin Johnson are pioneers in AI. While the world has only recently witnessed a surge in consumer AI, our guests have long been laying the groundwork for innovations that are transforming industries today.In this episode, a16z General Partner Martin Casado joins Fei-Fei and Justin to explore the journey from early AI winters to the rise of deep learning and the rapid expansion of multimodal AI. From foundational advancements like ImageNet to the cutting-edge realm of spatial intelligence, Fei-Fei and Justin share the breakthroughs that have shaped the AI landscape and reveal what's next for innovation at World Labs.If you're curious about how AI is evolving beyond language models and into a new realm of 3D, generative worlds, this episode is a must-listen.Resources: Learn more about World Labs: https://www.worldlabs.aiFind Fei-Fei on Twitter: https://x.com/drfeifeiFind Justin on Twitter: https://x.com/jcjohnssFind Martin on Twitter: https://x.com/martin_casadoStay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

19 Syys 202444min

Apple’s Big Reveals, OpenAI’s Multi-Step Models, and Firefly Does Video

Apple’s Big Reveals, OpenAI’s Multi-Step Models, and Firefly Does Video

This week in consumer tech: Apple’s big reveals, OpenAI’s multi-step reasoning, and Adobe Firefly’s video model.Olivia Moore and Justine Moore, Partners on the a16z Consumer team, break down the latest announcements and how these product launches will shape the tech ecosystem, transform AI-powered experiences, and impact startups competing for attention in a fast-moving market. Resources: Find Justine of Twitter: https://x.com/venturetwinsFind Olivia on Twitter: https://x.com/omooretweets Stay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

14 Syys 202431min

Grand Challenges in Healthcare AI

Grand Challenges in Healthcare AI

Vijay Pande, founding general partner, and Julie Yoo, general partner at a16z Bio + Health, come together to discuss the grand challenges facing healthcare AI today.The talk through the implications of AI integration in healthcare workflows, AI as a potential catalyst for value-based care, and the opportunity for innovation in clinical trials. They also talk about the AI startup they each wish would walk through the door.  Resources: Find Vijay on Twitter: https://x.com/vijaypandeFInd Julie on Twitter: https://x.com/julesyooListen to more episode from Raising Health: https://a16z.com/podcasts/raising-health/ Stay Updated: Let us know what you think: https://ratethispodcast.com/a16zFind a16z on Twitter: https://twitter.com/a16zFind a16z on LinkedIn: https://www.linkedin.com/company/a16zSubscribe on your favorite podcast app: https://a16z.simplecast.com/Follow our host: https://twitter.com/stephsmithioPlease note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Stay Updated:Find a16z on XFind a16z on LinkedInListen to the a16z Podcast on SpotifyListen to the a16z Podcast on Apple PodcastsFollow our host: https://twitter.com/eriktorenberg Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures. Hosted by Simplecast, an AdsWizz company. See pcm.adswizz.com for information about our collection and use of personal data for advertising.

7 Syys 202437min

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