--- title: "Why building eval platforms is hard — Phil Hetzel, Braintrust" source_name: "AI Engineer" original_url: "https://www.youtube.com/watch?v=_fQ7Z_Wfouk" canonical_url: "https://www.traeai.com/articles/6e1d1281-6cdc-453b-99b5-08c12860913c" content_type: "video" language: "其他" score: 0 tags: [] published_at: "2026-04-28T16:00:06+00:00" created_at: "2026-04-30T09:27:45.377649+00:00" --- # Why building eval platforms is hard — Phil Hetzel, Braintrust Canonical URL: https://www.traeai.com/articles/6e1d1281-6cdc-453b-99b5-08c12860913c Original source: https://www.youtube.com/watch?v=_fQ7Z_Wfouk ## Summary 该链接指向的是一个YouTube视频页面，而非一篇技术文章。因此无法提取摘要。 ## Key Takeaways - 该链接指向的是一个YouTube视频页面，而非一篇技术文章 - 因此无法提取摘要 ## Content Title: Why building eval platforms is hard — Phil Hetzel, Braintrust URL Source: http://www.youtube.com/watch?v=_fQ7Z_Wfouk Markdown Content: # Why building eval platforms is hard — Phil Hetzel, Braintrust - YouTube Back [![Image 1](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)](http://www.youtube.com/ "YouTube Home") Skip navigation Search Search with your voice [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [Sign in](https://accounts.google.com/ServiceLogin?service=youtube&uilel=3&passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26hl%3Den%26next%3Dhttps%253A%252F%252Fwww.youtube.com%252Fwatch%253Fv%253D_fQ7Z_Wfouk&hl=en&ec=65620) [![Image 2](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)](http://www.youtube.com/ "YouTube Home") [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [Why building eval platforms is hard — Phil Hetzel, Braintrust](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) Tap to unmute 2x [![Image 3](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) ## Why building eval platforms is hard — Phil Hetzel, Braintrust AI Engineer 5,009 views 1 day ago [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) Search Copy link Info Shopping ![Image 4](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) [![Image 5](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) If playback doesn't begin shortly, try restarting your device. • You're signed out Videos you watch may be added to the TV's watch history and influence TV recommendations. 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[Learn more](https://support.google.com/youtube/answer/3037019#zippy=%2Ccheck-that-youre-signed-into-youtube) [Sign in](https://accounts.google.com/ServiceLogin?service=youtube&uilel=3&passive=true&continue=https%3A%2F%2Fwww.youtube.com%2Fsignin%3Faction_handle_signin%3Dtrue%26app%3Ddesktop%26hl%3Den%26next%3D%252Fwatch%253Fv%253D_fQ7Z_Wfouk&hl=en) # Why building eval platforms is hard — Phil Hetzel, Braintrust [![Image 7](https://yt3.ggpht.com/ajVemEB89DAOemsbfuMY6ZOWXJAACx3cbty9z21jeqRKODaVkDBSRun1b1xfQJljEsziOWS_Mg=s48-c-k-c0x00ffffff-no-rj)](http://www.youtube.com/@aiDotEngineer) [AI Engineer](http://www.youtube.com/@aiDotEngineer) AI Engineer 435K subscribers Subscribe Subscribed 123 Share Save Download Download 5K views 1 day ago 5,009 views • Premiered Apr 28, 2026 An eval platform is not just a test runner. You are building shared definitions of "good," reliable data pipelines, lab…...more ...more How this was made Auto-dubbed Audio tracks for some languages were automatically generated. [Learn more](http://support.google.com/youtube/answer/15569972?hl=en) Transcript Follow along using the transcript. Show transcript [![Image 8](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) ### AI Engineer 435K subscribers](http://www.youtube.com/@aiDotEngineer) [Videos](http://www.youtube.com/channel/UCLKPca3kwwd-B59HNr-_lvA/videos)[About](http://www.youtube.com/channel/UCLKPca3kwwd-B59HNr-_lvA/about) Show less ## Live chat replay See what others said about this video while it was live. Open panel [](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) # Why building eval platforms is hard — Phil Hetzel, Braintrust 5,009 views 5K views Premiered Apr 28, 2026 123 Share Save Download Download ## 4 Comments Sort comments Sort by [Top Show featured comments](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)[Newest Show recent comments, including potential spam](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) ![Image 9: Default profile photo](https://yt3.ggpht.com/a/default-user=s48-c-k-c0x00ffffff-no-rj) Add a comment... ![Image 10](https://yt3.ggpht.com/ytc/AIdro_leOTmMuYY-hgsKTpBfP8aUoiD0DwOqO6tnMQZf2ThB58IS=s88-c-k-c0x00ffffff-no-rj) ### [@someoneinmyhead](http://www.youtube.com/@someoneinmyhead) [1 day ago](http://www.youtube.com/watch?v=_fQ7Z_Wfouk&lc=Ugwn4PThVY-22ahDEV14AaABAg) Great talk on such a vital topic. Show less Read more Like 1 Dislike Reply ![Image 11](https://yt3.ggpht.com/ytc/AIdro_nZWf7q1-_EOgnuOb1EJvaNT5cKmGWkcCQPILsVj7PMFmLw5JvSMl_dBznd044zzm-VKQ=s88-c-k-c0x00ffffff-no-rj) ### [@incepimus](http://www.youtube.com/@incepimus) [1 day ago](http://www.youtube.com/watch?v=_fQ7Z_Wfouk&lc=UgyHQURMn-XSMzj05KR4AaABAg) He said it wouldn't be a sales talk but it feels like a sales talk Show less Read more Like 10 Dislike Reply 1 reply Hide replies 1 reply ![Image 12](https://yt3.ggpht.com/ytc/AIdro_keQieevLSepjmmDYb6j3yKLVcLLAEj_FKQ0zbQSnOfwQ=s88-c-k-c0x00ffffff-no-rj) ### [@Somun-a](http://www.youtube.com/@Somun-a) [1 day ago](http://www.youtube.com/watch?v=_fQ7Z_Wfouk&lc=Ugy_FsWWMLZCqCMDwH14AaABAg) [5:00](http://www.youtube.com/watch?v=_fQ7Z_Wfouk&t=300s) "We love LLMs because they are highly variable": Sure, you do. It generated a lot of tangent sectors because they are not working reliably. Show less Read more Like Dislike Reply Top is selected, so you'll see featured comments ## Comments 4 [Top Show featured comments](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)[Newest Show recent comments, including potential spam](http://www.youtube.com/watch?v=_fQ7Z_Wfouk) ## In this video Transcript ## Description Why building eval platforms is hard — Phil Hetzel, Braintrust An eval platform is not just a test runner. You are building shared definitions of "good," reliable data pipelines, labelling workflows, versioning, and trust in results across many teams and model changes. This session breaks down the hidden complexity, the common failure modes, and the design principles that make evals credible and usable in day-to-day engineering. Speaker info: * [![Image 13](http://www.youtube.com/watch?v=_fQ7Z_Wfouk)/philliphetzel](https://www.youtube.com/redirect?event=video_description&redir_token=QUFFLUhqbFRWTDN6d0pTWHZjaThrcmN2N1NBTV8xd2F3Z3xBQ3Jtc0ttZXJBXzRxLUQyWVRUbEtsUW1zSGpKc2tHanBBTTh6UmdST2ZLZmVKRmJ3S0JtdzFrNmJDRjRoMzRDMjU4Y044cWZxWnBQN21xR3hJRUlIQnFRcWlXVTJxNnhWam1Kakx1QWMzbVlKMmEyZEJCbWt5TQ&q=https%3A%2F%2Fwww.linkedin.com%2Fin%2Fphilliphetzel%2F&v=_fQ7Z_Wfouk) …...more ...more Show less How this was made Auto-dubbed Audio tracks for some languages were automatically generated. [Learn more](http://support.google.com/youtube/answer/15569972?hl=en) Transcript Follow along using the transcript. 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