HeyGen Lip Sync (Speed)

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HeyGen · heygen/lipsync-speed

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Tasks using this model

Video Lip Sync

Input contract

Required inputs: audio, video
Optional inputs: disable_music_track, enable_dynamic_duration, enable_speech_enhancement
Output: video (uri)
Submission: Official Replicate model endpoint (always current version)

Provider billing

$0.0333 per output second

Provider-side unit, for reference only. This site charges a fixed credit tier per execution — the price shown at quoting time is the price paid.

Contract notes

Re-locked 2026-10-06 (batch E): latest version 8eabe9f38713 carries a field-identical schema vs the A0 snapshot; schemaVersion updated in lockstep. enable_dynamic_duration is PINNED OFF server-side: with it on, the output follows the audio length — billing seconds the upload layer cannot probe — and the provider enforces a ±15% audio/video duration preflight that rejects mismatched pairs outright (probe run 2026-10-06: 3.00 s video + 4.73 s audio failed preflight). With it off, output = source video length and longer audio is trimmed (MEASURED 2026-10-06: 3 s video + 4.733 s audio → 3.000 s / 1920x1080 output). "Fast" mode of the lip-sync task; not an automatic retry of the precision model. Enabled 2026-10-06: batch E deployed-app E2E green (batch-e-e2e report).

Status

This model is catalogued and its contract is locked, but real executions have not passed acceptance yet. Nothing on this page should be read as a claim that it is usable today.

License: Official model; commercial terms not yet reviewed.
Last verified: 2026-10-05

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