sync-3 | Sync

Quick reference


Model name	`sync-3`
Status	Default model for all users
API endpoint	`POST /v2/generate`
Languages	95+
Face resolution	4K native output
Pricing (at 25 fps)	$0.107 – $0.133/sec
Available in	API, Studio, Adobe Premiere Plugin

What’s new

Previous models processed video in small, independent snippets. sync-3 takes a fundamentally different approach — it builds a global understanding of a person across an entire shot, generating all frames at once rather than stitching together isolated segments.

The result is a generational shift in consistency and realism.

Capability	What changed
Close-ups & partial faces	Tight close-ups, cropped frames, and partially obscured faces are handled natively — cinematic and editorial content that was previously off-limits.
Extreme angles	Profile shots, over-the-shoulder angles, and non-frontal lip positions that broke earlier models are now handled with confidence.
Obstruction detection	Hands, microphones, scarves — sync-3 detects obstructions automatically and generates around them without manual intervention.
Style & emotion preservation	Preserves the original speaker’s cadence and emotional expression. Silent lips can be opened naturally. The output isn’t just accurate — it feels like the person actually said it.

How it works

sync-3 generates from a larger spatial window than any previous model, giving it a much wider field of view around the face. The model can reason about what to generate and what to preserve because it has enough context to understand the full scene.

This means fewer retakes, fewer manual fixes, and the best generation possible in any scenario.

Options not available

The following generation options from previous models are not applicable to sync-3. Their capabilities are either built into the model or handled differently by the new architecture.

Option	Why it’s not needed
`temperature`	sync-3 manages expressiveness natively — no manual tuning required.
`reasoning_enabled`	Frame analysis and correction for artifacts, occlusions, and extreme poses is built into the model.
`occlusion_detection_enabled`	Obstruction detection is automatic — sync-3 detects and generates around obstructions without manual intervention.

Integration

sync-3 is available through the standard Sync API. Pass sync-3 as the model parameter in your generation request.

1 from sync import Sync
2 from sync.common import Audio, Video
3 
4 sync = Sync()
5 
6 response = sync.generations.create(
7     input=[
8         Video(url="https://assets.sync.so/docs/example-video.mp4"),
9         Audio(url="https://assets.sync.so/docs/example-audio.wav")
10     ],
11     model="sync-3"
12 )

Need to get set up first? See the Quickstart guide for API key creation and SDK installation.

Works with

Sync Studio

Web app — try sync-3 interactively with no code.

Adobe Premiere Plugin

Lip sync directly inside your editing timeline.

API & SDKs

Build sync-3 into your product with Python, TypeScript, or REST.

Also available via ComfyUI and MCP Server for AI-assisted workflows.

How sync-3 compares

	sync-3	lipsync-2-pro	lipsync-2
Face resolution	4K native	512×512 (enhanced detail)	512×512
Close-ups & partial faces	Native	Limited	Limited
Extreme angles	Native	Limited	Limited
Obstruction detection	Automatic	Manual opt-in	Manual opt-in
Emotion preservation	Full cadence & expression	Preserves speaking style	Preserves speaking style
Silent lip opening	Yes	No	No
Processing	Full-shot (all frames at once)	2-second independent chunks	2-second independent chunks
Pricing (at 25 fps)	$0.107 – $0.133/sec	$0.067 – $0.083/sec	$0.04 – $0.05/sec

sync-3 is the best choice for production-grade video — especially content with close-ups, complex angles, or obstructions. For simpler videos where cost is a priority, lipsync-2 or lipsync-2-pro remain excellent options.

FAQs

How do I switch an existing integration to sync-3?

Change the model parameter from your current model (e.g. lipsync-2) to sync-3. The rest of the request schema is unchanged — no other code changes required.

Does sync-3 still require obstruction detection to be enabled manually?

No. sync-3 detects obstructions automatically. You no longer need to set occlusion_detection_enabled in your request options.

What languages does sync-3 support?

sync-3 supports 95+ languages — the same broad language coverage as previous models. It’s designed for global dubbing at native quality.

Can I use sync-3 with the Batch API?

Yes. sync-3 works with the Batch API the same way as other models — just set model to sync-3 in each job.