Data and AI releases

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Annotations Rest API (v3) and additional improvements

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Description: We added new REST API endpoints to manage annotation categories and access new annotation fields (like end date). HC Docs have been updated with the new API. Quality of life improvement: allow bulk copying annotations across projects (from the manage annotations table in project settings). This was a requested feature.

Developer tools

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Also shipped Dec 29, 2025Amplitude in December 2025 →

Container Images (release 251229)

- quay.io/deepgram/self-hosted-api:release-251229 Equivalent image to: quay.io/deepgram/self-hosted-api:1.173.4 quay.io/deepgram/self-hosted-engine:release-251229 Equivalent image to: quay.io/deepgram/self-hosted-engine:3.107.0 Minimum required NVIDIA driver version: >=570.172.08 quay.io/deepgram/self-hosted-license-proxy:release-251229 Equivalent image to...

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feldera 0.213.0

- docs: removed CONVERT function from the index of functions py: add tests for AS OF joins with different ON clauses [adapters] Fix pipeline getting stuck due to output connector error. [SQL] Do not preserve source positions for internally-generated SQL [logging] fix logging text to assert against new format [profiler-viz] Several improvements requested

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Streaming transformation (special property) improvements

Description: After reviewing 2025 customer tickets, the team identified a significant concentration of issues related to streaming transformation limitations around special properties. To improve customer experience and reduce support load, we prioritized a set of improvements and clarifications in Q4.

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Session Replay Amplitude Session Matching

Description: • Session Replay matches replays to Amplitude data to provide a complete view of the user journey. This matching links device and session information from Session Replay to Amplitude sessions. Previously, matching was limited to the Amplitude session_id , which meant customers using custom session definitions weren’t fully supported.

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New Duration Estimator

Description: The new Duration Estimator transforms how you plan web and feature experiments. By automating the busywork and making trade-offs transparent, you can now confidently design tests with realistic timelines without leaving Amplitude or manually pulling historical data.

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Web Vitals Metrics Hub

Description: Visualize web vitals with our dedicated Web Vitals marketing hub. Enable Web Vitals on your browser SDK to start collecting data, and then visit our new Marketing Hub to be able to visualize and interact with the data. Why: Measure your site performance and understand your SEO better without the need for an extra 3rd party provider.

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AI Controls + Org-Level AI Context

Description: We’ve added a new tab, AI Controls, in org settings that will be the new home for Amplitude AI configs, context management, and enterprise AI controls (in the future!). The first feature in AI Controls is an AI Context input which lets customers provide org-level context to Ask AI and Agents.

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Capture Session Replays via the Chrome Extension

Description: You can now capture Session Replays directly from the Amplitude Chrome extension, no code changes required. By enabling Session Replay in Event Test Mode, you can instantly record and inspect real user experiences on any site that supports Session Replay. This is a powerful way to test run Session Replay without contacting a developer.

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