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HeyGen
closed · proprietaryInteractive Avatar API (Streaming Avatar SDK, default avatar)last tested 2026-04-30T15:30:00Z
endpoint · Interactive Avatar API (Streaming Avatar SDK)
homepage · https://www.heygen.com
All six probes vs. field median
Values normalized to [0,1]. IFC normalized as 1 − |v − 1|.
Raw scores
| Probe | Value | Unit |
|---|---|---|
| GR — Generation Rate | 0.003 | ratio |
| XPD — Cross-Run Pixel Diversity | 0.003 | embedding-dist |
| AVC — Audio→Motion Causality (off-mouth) | 0.060 | pearson-r |
| LWA — Listening-Window Activation | 1.010 | ratio |
| EVD — Emotional-Valence Differentiation | 0.140 | fisher-ratio |
| IFC — Idle-Loop Compression | 0.060 | ratio-vs-human |
Frame strips
Identical-input replays. Hashes computed by the harness.
support-package-lookup
✗ identicalComposite history
Disclosure
Tested through the Interactive Avatar streaming API with a stock avatar. Captured at 30fps via the official client SDK. Bit-identical hashes across identical-audio replays.