OpusClip API alternative: what Sume can cut and what it cannot

No. Sume does not ship an endpoint that reads a long video and picks the best moments for you, which is what OpusClip's API sells. Sume gives you the cutting tools around that decision: a free-form range trim, caption burn-in, a clip inspector with an optional transcript, and a timeline that stitches the clips you chose.

That makes Sume a fit when you (or your own code, or an LLM reading a transcript) decide where the cuts go, and a poor fit when you want the vendor to decide. This page lists both sides from the vendors' own pages, read on 2026-10-11, and from the Sume docs.

What OpusClip's API page says it does

The OpusClip API page (read 2026-10-11) describes a POST https://api.opus.pro/api/clip-projects call that submits a long-form video to create a clipping project. It also lists branded captions in multiple languages, reframing for any aspect ratio, and detecting and posting key moments from a livestream. It mentions SDKs, a public OpenAPI file with llms.txt, an MCP for agents, and a self-serve free tier.

The OpusClip pricing page (read 2026-10-11) lists Free at $0, Starter at $15 a month, Pro at $29 a month and a custom Business plan. API access (Video Editing, Scheduler, MCP connector) appears under Pro, along with 30GB local uploads and public MP4 URLs. The pages I read do not publish per-call API prices or rate limits.

What Sume has for the same job

Each piece below is a separate job you call yourself. None of them chooses moments.

• Video inspect probes one clip, samples stills (8 by default, up to 24), and can return a word-level transcript at $0.01 per audio minute. The transcript is how you or a model find the moments.
• Video trim cuts a [start, end) range from one clip into a new MP4 at $0.02 per job. The source is not changed.
• Video captions burns styled captions onto a finished video at $0.20 per job, priced for videos of up to 60 seconds.
• Timeline 1.0 assembles up to 200 video slots over one audio spine of 1 to 1800 seconds at $0.10 per output minute, rounded up.

The catch: where the long video comes from

Trim, inspect and timeline only accept a media.sume.com video that your workspace already owns; they never fetch from the open internet. The way in is POST /v1/media-imports, and the route description in the API says it imports a public TikTok or Instagram video URL and rejects YouTube and other hosts with unsupported_platform, at a fixed estimate of $0.15 per accepted import.

So the docs do not describe an upload path for an arbitrary hour-long webinar file. If your source is a Sume generation artifact or a TikTok or Instagram post, the chain works. If it is a YouTube link or a local recording, check Media inputs and the live OpenAPI before you plan around it.

Side by side

A worked chain with real prices

Say a creator picks a 20-second moment from an Instagram post and wants it captioned. The import is $0.15, the trim is $0.02, and the caption job is $0.20, so the chain costs $0.37 before any transcript. Add a transcript pass only when you need words to decide where to cut: it is $0.01 per audio minute plus the inspect compute, which the docs say is reserved up front and captured at its own container seconds.

If you came for an automatic highlight picker, keep OpusClip for that step and use Sume for the stage after it, once you have timestamps. If you came for deterministic cuts with a price printed in the docs, the chain above is it.