Live avatar agent or rendered video: D-ID vs Sume

D-ID's V4 Expressive Visual Agents are live avatars connected to an LLM, with turns reported under half a second. Sume's avatar video is the other shape: a rendered file made from a script, 4 to 60 seconds long. Choose live when a person talks back, and rendered when you want a finished video you can review first.

What D-ID reports

The D-ID page is dated March 16, 2026, and an update to D-ID's Agents API specification was merged on September 28, 2026. Treat the figures as D-ID's own claims.

What Sume's avatar video is

Avatar videos turn a ready avatar into a script-driven talking video. The canonical route is POST /v1/avatar-1.0/talking-video, with a top-level avatar_handle and exactly one of script or video_inputs. Sume accepts scripts and multi-scene plans when the estimated duration is 4 to 60 seconds inclusive. Longer scripts have to be shortened or split into multiple jobs.

Options include quality of standard, plus (the default) or max, an aspect_ratio of 1:1, 3:4, 9:16, 4:3 or 16:9 with 9:16 the default, and a resolution that is currently 720p.

Choosing

A live agent fits support desks, kiosks and role-play, where the person speaks and the avatar answers. A rendered video fits ads, explainers and training, where you want to check the words and the shot first, reuse the file, and publish it anywhere. Sume does not offer a live conversational avatar in the docs read for this post.

Resolution is the visible gap. D-ID reports up to 4K for its agents and Sume's avatar video is 720p today. If you need a larger frame, check the current docs before you choose.

A mixed approach

Some teams use both: a live agent for the conversation, and rendered clips for the scripted parts such as an intro or a product walkthrough. Neither replaces review. Read the script out loud before you render, because a rendered mistake costs a full job.