## The technical channel X is where we post for engineers, and the register is different from everywhere else: shorter, more specific, and comfortable being provisional. A finding about where milliseconds disappear in a call path, or why a particular class of interruption is hard to handle, goes out here long before it becomes a considered blog post — often while we are still arguing about it internally. If you want the polished version, wait for the blog. If you want to see the work while it is still rough, this is the channel. Overview of What We Publish on X

## What lands here Threads on the problems that make voice hard: end-of-turn detection, barge-in, the latency budget across transcription, reasoning, synthesis and telephony, and why speech recognition degrades on phone audio specifically. Notes on things that surprised us, including benchmarks that did not reproduce and approaches we abandoned. Launch announcements, briefly. And commentary on what other people in the category are shipping, which we try to keep honest — competitors get credit here when they do something good, because engineers can tell when they are being sold to. ## Asking us things This is the channel where a direct technical question is most likely to get a direct technical answer, including "no, we do not do that" and "that is a real limitation." We would rather tell you a constraint early than have you find it three weeks into a build. For anything involving your specific account or data, though, move it off a public timeline — the contact route on the pricing page exists for that. ## Frequently asked questions X is where we post for engineers, and the register is different from everywhere else: shorter, more specific, and comfortable being provisional. A finding about where milliseconds disappear in a call path, or why a particular class of interruption is hard to handle, goes out here long before it becomes a considered blog post — often while we are still arguing about it internally. Threads on the problems that make voice hard: end-of-turn detection, barge-in, the latency budget across transcription, reasoning, synthesis and telephony, and why speech recognition degrades on phone audio specifically. Notes on things that surprised us, including benchmarks that did not reproduce and approaches we abandoned. This is the channel where a direct technical question is most likely to get a direct technical answer, including "no, we do not do that" and "that is a real limitation." We would rather tell you a constraint early than have you find it three weeks into a build. For anything involving your specific account or data, though, move it off a public timeline — the contact route on the pricing page exists for that. ## Try Persistence Design, test, and deploy production-ready voice agents. ## Continue reading