UNITH's Video Synthesis Pipelines
UNITH operates two in-house video synthesis pipelines: THAI and DEVA-1. Both power the same Digital Human product and are fully compatible with all conversation operating modes, but they differ in capability and availability.This page explains what each pipeline is and when to use one over the other.
THAI
THAI is UNITH's primary video synthesis pipeline, powering the majority of head visuals available on the platform today. It has been in production for several years and is stable, broadly supported, and well-suited to a wide range of deployment scenarios.
When to choose THAI:
- You need broad availability of head visuals and voices
- Your use case does not require highly expressive or naturalistic facial movement
- You want a well-supported, production-hardened pipeline
DEVA-1
DEVA-1 is the result of UNITH's ongoing R&D investment in next-generation video synthesis. It produces more natural, expressive output than THAI including subtle head movement, micro-expressions, and facial dynamics that follow the rhythm and tone of speech. DEVA-1 is under active development and head visual availability will grow over time.
When to consider DEVA-1:
- You are working on a longer-horizon project and want to build on UNITH's forward-looking pipeline
- Visual naturalness and expressivity are a priority for your use case
- You are building an experience where the rigidity of loop-based video would be noticeable
DEVA-1 is currently available to a limited set of clients as part of an early access program. It is not enabled by default. See Access and Availability below.
Comparison
| THAI | DEVA-1 |
|---|---|---|
Expressivity | Idle and response loops | Micro-expressions, natural head motion, prosody-driven movement |
Head visual availability | Broad, majority of UNITH visuals | Limited, expanding over time |
Maturity | Production-stable | Active development / early access |
Conversation modes | oc, doc_qa, plugin, ttt | oc, doc_qa, plugin |
Expected latency | Low | Comparable to THAI |
Availability | All clients | Selected clients (early access program) |
Conversation Mode Compatibility
Both pipelines work with all standard UNITH conversation operating modes: Open Dialogue (oc), Document / Knowledge Base (doc_qa), and Plugin (plugin). THAI additionally supports Text-to-Video (ttt) generation. The pipeline choice does not affect how you configure conversation behavior, prompts, or integrations, it is a property of the head visual, not the operating mode.
Access and Availability
THAI is available to all UNITH clients and requires no special enrollment.
DEVA-1 is currently enabled only for selected clients participating in UNITH's early access program. If you are interested in enrolling or if DEVA-1 better fits your use case, reach out to us directly.
Interested in DEVA-1 access? Get in touch with the UNITH team and we will assess whether your use case is a good fit for the current program.