--- title: "Avatar IV AI model: facts and benchmarks | Kendr" canonical: "https://kendr.org/models/heygen-avatar-iv" date_modified: "2026-09-06" profile_kind: "reference" --- # Avatar IV model profile Avatar IV is a HeyGen model profile with a no verified token context limit in this snapshot. The dated catalog snapshot records text, image, audio, video modalities and interfaces for audio input, video generation, vision. HeyGen: Avatar IV is an image-to-video model that animates a single photo into an expressive, lip-synced talking-head video. Rather than only matching mouth shapes to words, it interprets the vocal... Avatar IV is a reference profile: HeyGen publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call. Avatar IV is an independent knowledge profile. It does not claim that Kendr hosts the model, quote a Kendr customer price, promise API availability, or advertise a Kendr routing receipt. Avatar IV accepts text, image, and audio and returns video. The snapshot records audio input, video generation, and vision as capabilities or interfaces. The dated unit-price records list $0.05 per second for video_output (duration_seconds). Each figure retains its billable dimension, variant, provider, source, and evidence date. No comparable third-party benchmark value is present in the 2026-09-06 snapshot. Missing values are not estimated. No comparable popularity rank or traffic share is present in the 2026-09-06 snapshot. No comparable routing rank or traffic-share observation is attached to this dated profile; missing adoption evidence is not estimated. Profile data was reviewed for the 2026-09-06 snapshot. Claims retain their source dates, and unavailable fields are shown as unavailable instead of estimated. ## Profile facts - **Profile type:** Model research profile - **Provider or publisher:** HeyGen - **Context window:** No verified limit - **Snapshot date:** 2026-09-06 - **Knowledge cutoff:** Not disclosed - **Reference catalog ID:** heygen/avatar-iv ## When to pick Avatar IV Avatar IV is a reference profile: HeyGen publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call. Each condition below is derived from this model's own values in the 2026-09-06 snapshot, compared only against models publishing the same field. - Reach for it when the input includes images. The snapshot records image input, so screenshots, scans, and diagrams can be sent directly instead of described. - Reach for it when the input is speech. The snapshot records audio input, so recordings can go to this route rather than being transcribed first. - Reach for it when the output is video. This route produces video rather than only text, and those units are priced separately from tokens. - Look elsewhere when you need to call it through Kendr today. This is a research reference profile with no Kendr alias. The facts and evidence here are published for comparison; the model is not routable on Kendr. - Look elsewhere when you are building an agent. No tool-calling capability is recorded for this model in the snapshot. Agent loops need a route that can call functions. ## Context, modalities, and identity Avatar IV accepts text, image, and audio and returns video. The snapshot records audio input, video generation, and vision as capabilities or interfaces. - **Provider or publisher:** HeyGen - **Context window:** No verified limit - **Maximum output:** No verified numeric limit - **Input modalities:** text, image, and audio - **Output modalities:** video - **Knowledge cutoff:** Not disclosed ## Model overview HeyGen: Avatar IV is an image-to-video model that animates a single photo into an expressive, lip-synced talking-head video. Rather than only matching mouth shapes to words, it interprets the vocal... - **Reference model ID:** heygen/avatar-iv - **Canonical version:** heygen/avatar-iv-20260625 - **Hugging Face ID:** Not separately documented ## Capabilities and supported controls Capabilities and parameters are reported from the dated catalog and source records; their presence does not guarantee identical behavior across every provider route. - **Supported parameters:** No verified parameter list - audio input - video generation - vision ## Dated pricing snapshot The dated unit-price records list $0.05 per second for video_output (duration_seconds). Each figure retains its billable dimension, variant, provider, source, and evidence date. These are dated third-party reference prices, not Kendr prices or an availability offer. Routes, tiers, caching, region, and provider policy can change the landed price. - **Price date:** 2026-09-06 - **Input:** No verified rate - **Cached input:** No verified rate - **Output:** No verified rate | Billable | Variant | Cost | Unit | Provider | As of | | --- | --- | --- | --- | --- | --- | | video_output | duration_seconds | $0.05 | per second | Not specified | 2026-09-06 | ## Provider routes, performance, and uptime The snapshot retains 1 provider endpoint. Provider prices, context limits, p50 performance, and uptime can differ by route and are not Kendr guarantees. - **Active provider endpoints:** 1 - **Best p50 latency:** No recent metric - **Best p50 throughput:** No recent metric - **Availability with routing:** No recent metric - **Availability without routing:** No recent metric - **Performance date:** 2026-09-06 | Provider | Quantization | Input / 1M | Output / 1M | Cache read / 1M | Context | p50 latency | p50 throughput | Uptime (1d) | | --- | --- | --- | --- | --- | --- | --- | --- | --- | | HeyGen | unknown | $0 / 1M | $0 / 1M | No verified rate | 0 tokens | No recent p50 | No recent p50 | No recent uptime | ## Benchmark evidence and limitations No comparable third-party benchmark value is present in the 2026-09-06 snapshot. Missing values are not estimated. Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source. ## Popularity and market context No comparable popularity rank or traffic share is present in the 2026-09-06 snapshot. No comparable routing rank or traffic-share observation is attached to this dated profile; missing adoption evidence is not estimated. - **Third-party catalog rank:** No verified rank - **Global market share:** Not inferred - **Observation date:** 2026-09-06 ## Frequently asked questions ### When should I use Avatar IV? Avatar IV is a reference profile: HeyGen publishes it, Kendr documents it for comparison, and it carries no Kendr alias to call. Reach for it when the input includes images: The snapshot records image input, so screenshots, scans, and diagrams can be sent directly instead of described. Reach for it when the input is speech: The snapshot records audio input, so recordings can go to this route rather than being transcribed first. Reach for it when the output is video: This route produces video rather than only text, and those units are priced separately from tokens. Look elsewhere when you need to call it through Kendr today: This is a research reference profile with no Kendr alias. The facts and evidence here are published for comparison; the model is not routable on Kendr. Look elsewhere when you are building an agent: No tool-calling capability is recorded for this model in the snapshot. Agent loops need a route that can call functions. ### What is Avatar IV? Avatar IV is a HeyGen model profile with a no verified token context limit in this snapshot. The dated catalog snapshot records text, image, audio, video modalities and interfaces for audio input, video generation, vision. ### Does Avatar IV have a verified token context window? No comparable token context window is present in this dated profile. The page reports text, image, and audio inputs, video outputs, and source-backed modality limits instead of inventing a token limit. ### What benchmark evidence is available for Avatar IV? No comparable third-party benchmark value is present in the 2026-09-06 snapshot. Missing values are not estimated. Third-party catalog fields normalized from the cited model dataset; benchmark methodology and coverage differ by source. ### Is Avatar IV available through Kendr? This is an independent knowledge profile, not a Kendr-hosted availability claim. Check Kendr's live public model API for currently enabled Kendr aliases. ### Does the popularity rank represent Avatar IV's global market share? No comparable popularity rank or traffic share is present in the 2026-09-06 snapshot. No comparable routing rank or traffic-share observation is attached to this dated profile; missing adoption evidence is not estimated. No global market-share percentage is inferred when the source does not publish one. ## Sources and evidence dates - [Avatar IV third-party catalog record](https://openrouter.ai/heygen/avatar-iv) — catalog, checked 2026-09-06 - [Third-party model catalog methodology](https://openrouter.ai/docs/guides/overview/models) — methodology, checked 2026-09-06 - [HeyGen official model documentation](https://docs.heygen.com/) — primary, checked 2026-09-06 - [Avatar IV third-party catalog record](https://openrouter.ai/heygen/avatar-iv) — catalog, checked 2026-09-06 Live Kendr operational availability is published separately at https://api.kendr.org/api/public/models.