Mike Krieger

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@mikeyk

Building at Anthropic Labs @anthropicai.
Before: CPO at Anthropic, co-founder & CTO of @instagram and @artifact_news

37.760571,-122.387567 anthropic.com/careers Joined November 2006

272 Following 469K Followers 543 Posts

Latest posts 5

Mike Krieger @mikeyk Oct 21

We're opening Claude Duet today as a research preview, starting with a waitlist. It's our take on giving everyone a trusted partner with your work.

I've been using it for a few weeks, at work and at home. It drafted questions for a fireside chat, watched Slack over the weekend so I could log off, and told me about the new @nealstephenson book — and then ordered it from my local bookstore once I asked.

We've found Opus 5.5 was our first model with the judgment to be proactive in the right ways. Here's what that's looked like.

1:16

Mike Krieger @mikeyk Oct 7

Another model joins the 5.5 family with the small but mighty Haiku 5.5! It’s built for speed and efficiency, and costs 75% less than Haiku 4.5. Opus does the heavy thinking, Haiku does the high-volume work, and together you get more done for less. Happy shipping!

Claude Verified account @claudeai Oct 7

Introducing Claude Haiku 5.5: the cheapest, fastest, and most capable small model we’ve ever released.

On average, it costs around 75% less to run than Claude Haiku 4.5.

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Mike Krieger @mikeyk Sep 28

Sonnet 5.5, the second release in the 5.5 family, is out! It’s 30%+ faster than Sonnet 5 and up to 30% cheaper for most work.

Claude Verified account @claudeai Sep 28

Introducing Claude Sonnet 5.5, the second model in the Claude 5.5 family.

It’s a clear upgrade over Sonnet 5, runs more than 30% faster, and costs up to 30% less for most work.

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Mike Krieger @mikeyk Sep 22

Go try out Opus 5.5, which we launched today! It leads in coding and knowledge work, and it’s a great writer. It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.

Claude Verified account @claudeai Sep 22

Introducing Claude Opus 5.5, the first model in our new Claude 5.5 family.

It performs at the level of Claude Fable 5.1 for most tasks, and costs 40% less to run than Opus 5.

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Mike Krieger @mikeyk Sep 17

Omid and the team did great work on this one. Most of my Claude Desktop work these days is in these new-style projects and I've really enjoyed how easy it is to kick off a bunch of work while still having a coordinator Claude responding quickly

Omid Mogasemi Verified account @OmidMogasemi Sep 17

Super excited to show the world Projects!!

We've been building this for the last few months and it has become my new daily driver. A few tips for getting the most out of it 🧵
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