Claim◆Video · 12:29 — 13:38

Opus 45 wouldn't have had that moment without a product like Claude Code, and Claude Code wouldn't have had that type of adoption accelerated without Opus 45. You need frontier products in order to have frontier models and for people to feel the magic of frontier models.

Diane describes the symbiotic relationship between Claude Code and Opus 45: the model reached an intelligence level where users could run things end-to-end in an agentic manner, but that magic required a great product vehicle to be felt, and the product needed the model to accelerate adoption. ✦ AI generated

Diane Penn · Lenny's Podcast · 2026-07-26 · original ↗

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starts at this moment · 12:29

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“What I always think about is Opus 45 which was also during winter break when everyone was home able to code. Was that another big milestone?”

I think what was magical about Opus 45 is we also now not just had a model but a vehicle which is like a great product experience like Claude Code. One thing we say a lot on the team is you need frontier products in order to have frontier models and for people to feel the magic of frontier models. I think Opus 45 wouldn't have had that moment without a product like Claude Code and Claude Code I think wouldn't have had that type of adoption accelerated without Opus 45.

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12:16interesting to hear that that was internally a big milestone. It almost feels like this confidence you all built that wow we could really ship a frontier model which is now today so not great if you compare it to what we've got today. What I always think about is Opus 45 which was and interestingly like a year later also during winter break when everyone was home able to code. Uh was

12:37that another big milestone? >> Yeah. Um Opus 45 was definitely another large moment. I think what was magic about magical about Opus 45 is we also now not just had a model but a vehicle which is like a great product experience like cloud code. Um one thing we say a lot on the team is you need frontier products in order to have frontier models and for people to feel the magic

13:06of frontier models. And I think you know we felt the magic of cloud code for very for for uh for many months before that. Uh but the fact that the model essentially got to a level of intelligence where at a very broad level users can experience both frontier intelligence in new use cases allow it to run things end to end in an agent manner. I think that was the

13:35inflection. It was actually both. I I think Opus 45 wouldn't have had that moment without a product like Cloud Code and Cloud Code I think wouldn't have had that type of adoption accelerated without Opus45. >> So kind of speaking on on this on this thread uh Daario interestingly if you look back at all his predictions he's just like okay coding is going to be solved it 100% in like a year something

14:01like that. He kept talking about how we're going to do code like AI is going to do all our code. And I remember everyone uh being like, "There's no way. This is way too complicated. How is how is AI ever going to get really good at this very complex thing that humans do? No, this is going to be humans for a long time." He was completely right.

▦ Anthropic ✳ Opus 45

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In 2023 when I started, nobody said Anthropic and Claude and coding in the same sentence. I saw people were starting to use these models not just for code autocomplete, but actually writing long form code, and that was an opportunity for us to train Opus 3 to be better at coding. It ended up being a relatively smaller change from a training perspective but helped us differentiate competitively.Diane Penn · Lenny's Podcast · conf 65%

Extends · 1

You need frontier products in order to have frontier models, and for people to feel the magic of frontier models.Diane Penn · Lenny's Podcast · conf 90%

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gives example → Claude's coding capability was driven by a deliberate pivot and an eval-driven development loop.Lenny's Podcast (episode description) · Lenny's Newsletter gives example → In 2023 when I started, nobody said Anthropic and Claude and coding in the same sentence. I saw people were starting to use these models not just for code autocomplete, but actually writing long form code, and that was an opportunity for us to train Opus 3 to be better at coding. It ended up being a relatively smaller change from a training perspective but helped us differentiate competitively.Diane Penn · Lenny's Podcast provides context → If you're willing to spend $100,000 a year right now in tokens, you are living the way somebody in 2028 is going to live. You have to sweat the tokens as much as you sweat the pixels. You have to be using the models to come up with good and great and better ideas, and there's no substitute for that.Diane Penn · Lenny's Podcast gives example → One thing I ask the team frequently is: let's say Claude 8 comes around — what changes in what users do, and what does that mean for how you're building today? Is it going to be forward compatible to that experience? Being ambitious is very broad, so grounding it in thinking about future model capabilities is a way to describe that.Diane Penn · Lenny's Podcast