Longcat Avatar 1.5

Longcat Avatar 1.5

Playground

LongCat Avatar 1.5 is the upgraded LongCat Avatar with sharper lip sync and faster generation. Converts one photo + audio into audio-driven talking or singing avatar videos (Image-to-Video), capped at 64 seconds per clip, 720p tier $0.40/5s. Ready-to-use REST API, no coldstarts, affordable pricing.

Features

LongCat Avatar 1.5

LongCat Avatar 1.5 is an upgraded audio-driven avatar video model that turns a single photo into a realistic speaking or singing video. It delivers sharper lip sync, faster generation, natural head and body motion, and strong identity preservation, making it suitable for talking portraits, virtual presenters, short-form content, and avatar-driven storytelling.

Why Choose This?

• Sharper lip synchronization Aligns mouth movement closely with the input audio for more natural speech and singing performance.

• Natural full-body coherence Goes beyond lip motion to preserve believable head movement, facial expression, and body posture.

• Strong identity preservation Maintains facial identity and overall visual consistency across frames.

• Photo-to-avatar video Turns a static image into a lively speaking or singing performance.

• Improved generation speed Faster than earlier LongCat avatar workflows while keeping strong realism.

• Production-ready workflow Suitable for presenter videos, talking portraits, creator content, and personalized avatar clips.

Parameters

How to Use

1. Upload the audio — provide the voice or singing track to drive the avatar.
2. Upload the image — add the portrait photo of the person you want to animate.
3. Add a prompt — guide expression, pose, or visual style if needed.
4. Choose resolution — select 480p or 720p depending on quality and budget needs.
5. Set a seed (optional) — use a fixed value for more reproducible generations.
6. Submit — run the model and download the generated avatar video.

Example Prompt

Natural speaking performance with subtle head movement, calm expression, realistic lip sync, and stable identity.

Pricing

Pricing depends on output length and resolution.

Billing Rules

• 480p costs $0.20 per 5 seconds
• 720p costs $0.40 per 5 seconds
• Standard rate at 480p is $0.04 per second
• 720p is 2× the standard rate, or $0.08 per second
• All videos are billed for a minimum of 5 seconds
• Billing is capped at 64 seconds
• Audio longer than 64 seconds is automatically trimmed

Best Use Cases

• Talking portrait videos — Animate a still portrait into a speaking clip.
• Virtual presenters — Create avatar-led explainers, intros, and business presentations.
• Singing avatar content — Turn a portrait into a lip-synced singing performance.
• Short-form creator videos — Produce avatar content for social media and promotional clips.
• Personalized spokesperson media — Generate custom speaking videos without filming.

Pro Tips

• Use a clear, front-facing portrait for better facial stability.
• Upload clean audio for stronger lip sync and more natural rhythm.
• Keep prompts simple and focused on expression or motion style.
• Use 720p when realism matters more, and 480p when you want lower cost.
• Reuse the same seed when comparing prompt variations on the same portrait.

Notes

• Maximum clip length per job is 64 seconds
• Audio longer than 64 seconds is automatically trimmed
• Generation time is typically around 10–30 seconds of wall time per 1 second of video, depending on resolution and queue load
• Better source portraits and cleaner audio generally improve overall quality

Related Models

• InfiniteTalk — Higher-end avatar video workflow for more advanced speaking performance.
• InfiniteTalk Multi — Multi-character avatar workflow for more complex scenes.

# Submit the task
curl --location --request POST "https://api.wavespeed.ai/api/v3/wavespeed-ai/longcat-avatar-1.5" \
--header "Content-Type: application/json" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}" \
--data-raw '{
    "resolution": "480p",
    "seed": -1
}'

# Get the result
curl --location --request GET "https://api.wavespeed.ai/api/v3/predictions/${requestId}/result" \
--header "Authorization: Bearer ${WAVESPEED_API_KEY}"