Bret Taylor

Co-Founder @SierraPlatform. Board @OpenAI.

[Noam Brown @polynoamial]

An internal version of Astra, @OpenAI’s next major model family, solved 10 major open problems in mathematics, quantum complexity, and theoretical computer science.

We believe it will be a major step for scientific reasoning. https://t.co/iP6cyheZ7i

[Romain Huet @romainhuet]

Big news across the GPT-5.6 family:

• Luna is now 80% cheaper
• Terra is now 20% cheaper
• Sol runs 2.5× faster with Fast mode
• Auto-review in the app is now powered by Luna and 10× cheaper

[OpenAI @OpenAI]

We are committed to pushing the model frontier across cost efficiency, capability, and speed.

Starting today, we are reducing prices for GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20% , and offering a faster option for GPT-5.6 Sol in the API.

Luna and Terra’s lower prices are reflected in how usage is counted in Codex and ChatGPT Work, so your usage goes further.

[Bret Taylor @btaylor]

In the self-storage industry, StoreEase stands out for deep customer obsession, resulting in nearly twice the customer lifetime value of the industry norm. With Sierra, they are closing rental sales after hours and resolving 70% of service cases completely autonomously https://t.co/NfKDJfd8qZ

[Bret Taylor @btaylor]

Agency: Secure, scalable sandboxes for agents - the last article in our series on building Pinecone, the internal agent that powers the Sierra employee and developer experience https://t.co/aj6ivq8V0W

[Sam Altman @sama]

i want the US to win in AI both in open source and proprietary models, and i am glad to see this

[Bret Taylor @btaylor]

The best part about this acquisition is I get to build agents with @letsleverup all day - he is truly one of a kind

[Bret Taylor @btaylor]

I’m incredibly excited to share that Sierra is acquiring TakeOff, the leader in long-horizon AI agents. @claybavor and I couldn't be more excited to welcome @letsleverup and the entire TakeOff team.

In less than a year, they've built something truly special: an agent platform that delivers real business outcomes, is beloved by customers, and is growing incredibly quickly. Their maniacal focus on revenue driving, long-horizon agents has taken them from 0 to near 8 figures in revenue across several 7 figure contracts since the start of this year.

As we got to know the team, it became clear we were making the same bet: that fully autonomous agents would perform human-level work at software scale and that the largest businesses in AI would be built around outcomes, not inference. Takeoff has built an exceptional platform and team to make that real, and together we’re excited to build the leading company in long-horizon AI agents.

Welcome, Aakash and the Takeoff team. https://t.co/a5ZY2NnD2h

[Bret Taylor @btaylor]

I’m incredibly excited to share that Sierra is acquiring TakeOff, the leader in long-horizon AI agents. @claybavor and I couldn't be more excited to welcome @letsleverup and the entire TakeOff team.

In less than a year, they've built something truly special: an agent platform that delivers real business outcomes, is beloved by customers, and is growing incredibly quickly. Their maniacal focus on revenue driving, long-horizon agents has taken them from 0 to near 8 figures in revenue across several 7 figure contracts since the start of this year.

As we got to know the team, it became clear we were making the same bet: that fully autonomous agents would perform human-level work at software scale and that the largest businesses in AI would be built around outcomes, not inference. Takeoff has built an exceptional platform and team to make that real, and together we’re excited to build the leading company in long-horizon AI agents.

Welcome, Aakash and the Takeoff team. https://t.co/a5ZY2NnD2h

[Aakash Thumaty @letsleverup]

https://t.co/5YqqNncKAj

[Bret Taylor @btaylor]

We recently posted about Pinecone, Sierra’s internal agent every employee uses for everything from writing code to GTM. Mihai wrote up how the Pinecone team designed the MCP service behind it, including nuanced issues like access control and context overload. Check it out:

[Mihai Parparita @mihai]

https://t.co/dRHJG908PA

[Bret Taylor @btaylor]

@Alfred_Lin This advice is the most impactful change I made in my career by a mile. It takes self-awareness to do well.

[Bret Taylor @btaylor]

Sarah @saranormous is one of the most intense, engaged, and operationally excellent investors I have worked with — and every founder I have met who has worked with her feels the same way. Truly one of a kind https://t.co/SBr6lFAqTG

[John Waldmann @J_Waldmann]

In early 2024, I talked to a lot of experts and the consensus view was “you can reduce support costs by 30% with AI."

We asked instead: "How can we create a level of service for small businesses that was impossible before?"

Could we create an enterprise-level customer experience for a $50/mo freemium product?

We're still building against this goal and @SierraPlatform has been an awesome partner.

Thank you @btaylor and the entire team for the support from the beginning.

A few learnings below 🧵

[Bret Taylor @btaylor]

@ashwahi Always a space

[Bret Taylor @btaylor]

I courageously used two hand-written em dashes in this post

[Bret Taylor @btaylor]

https://t.co/QQwZvFfupT

[Bret Taylor @btaylor]

One Sierra engineer put it succinctly: Own the context, rent the intelligence.

[Bret Taylor @btaylor]

The key insight of Sierra Horizon is your company's moat is the context you have about your customers, and that will compound as more of your customer experience is powered by AI agents.

With every agent conversation, the context about your customers gets richer and your agents become more effective. That proprietary context remains yours as frontier intelligence improves, enabling you to deepen your differentiation and benefit from new models without fear that doing so could help your competitors.

And with Horizon, you don’t pay for tokens, you pay for business outcomes delivered. We bear the burden of managing token spend, and you can focus on what matters most to your business: growing your customer base and driving revenue. https://t.co/CXxfzcQNhI

[Bret Taylor @btaylor]

https://t.co/QQwZvFfupT

[Bret Taylor @btaylor]

https://t.co/QQwZvFfupT

[Greg Brockman @gdb]

our models are built to provide the best price for any given task.

if you're able to get better price/perf on any workload, would love to hear the details and look at it together — [email protected].

[Ana Botín @AnaBotin]

Working together with @SierraPlatform, we are using AI to do a better job for our 180 million customers by personalising our products and services, while also creating value for our shareholders. Deals are good when they work for both sides, and Brett and the Sierra team get it.

[Bret Taylor @btaylor]

I deeply resent that AI has forced me to eliminate em dashes from my writing for fear of signaling slop