Version history · ByteDance Seedance
Seedance 2.0 & 2.5 Release Notes and Full Version Timeline
This page is the factual record of every Seedance model release and its current access status. Seedance 2.0 launched February 12, 2026 and remains a supported Seedance 2.x API model. Seedance 2.5 officially launched July 31, 2026; BytePlus subsequently documented live API access under `dreamina-seedance-2-5-260628`.
When was Seedance 2.5 released and where can it be used today?
Seedance 2.5 was officially launched by ByteDance Seed on July 31, 2026. That launch announcement initially described BytePlus API access as coming soon. BytePlus subsequently published live documentation listing `dreamina-seedance-2-5-260628` as a supported enhanced video-generation model. As of September 8, 2026, documented output is 480p or 720p at 24 fps for 4–30 seconds.
Full Seedance release timeline
Seedance shipped in stages over approximately nine months. Here is every confirmed milestone with exact or best-confirmed dates.
- Seedance 1.0
First public release — text-to-video and image-to-video
ByteDance Seed introduced the first Seedance video models on Volcengine Ark, accessible to developers via API. Launched alongside Doubao 1.6 on Volcano Engine. Supported text-to-video (T2V) and image-to-video (I2V) at up to 720p.
- Seedance 1.0 Pro
Higher-fidelity developer tier
Released simultaneously with 1.0. The Pro suffix marked the higher-fidelity API tier, focused on developer and enterprise integration on Volcengine. Distinguished from the base 1.0 by improved output quality and higher resolution ceiling.
- Seedance 1.0 Lite
Speed-optimized consumer tier — 5-second clips, 480p–720p
A faster, lower-cost variant introduced to power consumer apps (Doubao, Jimeng). Capped at 5-second clips and 480p–720p resolution. The Lite suffix was the inverse of Pro: prioritizing speed and cost over fidelity.
- Seedance 1.5 Pro
Native audio-visual sync + director-level controls
The last release to carry the Pro suffix before the 2.0 unification. Added native audio-visual synchronization (lip-sync and ambient audio) and director-level camera controls as first-class features. Marked the capability baseline that 2.0 was built on.
- Seedance 2.0Current API status
Unified multimodal model — Pro/Lite split retired
Announced and released by ByteDance Seed. The 2.0 line unified the Pro/Lite tiering into a single model: 1080p native resolution, clips up to 12 seconds, native synchronized audio (dual-channel stereo, background music, SFX, voiceover, lip-sync), multi-shot cuts, five aspect ratios (16:9, 9:16, 1:1, 4:3, 3:4), and multi-reference image conditioning. No separate 2.0 Pro or 2.0 Lite SKU.
- Seedance 2.0 API — Public Beta
Volcengine Ark public beta opens for developers
The Seedance 2.0 API on Volcengine Ark transitioned from limited to public beta, making developer and enterprise integration broadly available. Pay-per-token billing: approximately 46 CNY per million tokens for pure generation (~$0.14/second effective rate per TechNode, Mar 5, 2026).
- Third-party hosted access
Global operators (including this site) go live
Independent operators wrapping the Volcengine Ark API began offering hosted Seedance 2.0 access with English-language interfaces, USD billing, and commercial licenses — filling the gap left by the absence of an official ByteDance English consumer product.
- Seedance 2.5 — announced
Volcano Engine FORCE conference reveal
ByteDance publicly unveiled Seedance 2.5 at the Volcano Engine FORCE 2026 conference. Headline claims: native 30-second single-clip generation (twice the 15-second ceiling of 2.0), expanded multimodal referencing, second-level control, and controllable timestamp-level editing. No API endpoint, no model ID, and no rate card were published on the day; access was described as enterprise beta with broader availability targeted for July.
- Seedance 2.5 — officially launched
ByteDance Seed launch post — Jimeng AI + Doubao Pro first
ByteDance Seed published the official launch post "One-take Creation, Flexible Referencing: Introducing Seedance 2.5." It confirmed 30-second audio-video clips, up to 30 image + 10 video + 10 audio references, and timestamp-level editing. The post stated that BytePlus ModelArk API access was coming soon.
- Seedance 2.5 API — documented liveCurrent API status
BytePlus adds Seedance 2.5 to supported enhanced models
BytePlus subsequently published live enhanced video-generation documentation listing `dreamina-seedance-2-5-260628` as supported. Current documented output is 480p / 720p, 24 fps, and 4–30 seconds.
Sources: ByteDance Seed launch posts and BytePlus enhanced video-generation documentation. Current API status verified September 8, 2026.
What changed between Seedance 1.x and 2.0
The 2.0 release is a quality-and-unification jump, not a new feature category. This table summarises the practical differences.
| Dimension | Seedance 1.x | Seedance 2.0 |
|---|---|---|
| Version tier model | Three tracks: 1.0, 1.0 Pro, 1.0 Lite (later 1.5 Pro) | Single unified model — no Pro/Lite split |
| Max output resolution | 720p (Lite: 480p) | 1080p native |
| Max clip duration | Up to 8 s (Lite: 5 s) | Up to 12 s |
| Native audio | 1.5 Pro only (added late 2025) | Standard — dual-channel stereo, music, SFX, voiceover, lip-sync |
| Prompt adherence | Good on simple prompts; drifts on complex multi-clause instructions | Holds compound prompts (subject + action + camera + style) reliably |
| Multi-reference conditioning | Not supported in 1.0; added in 1.5 Pro | Standard — character + setting + style frame simultaneously |
| Aspect ratios | 16:9 and 9:16 | 5 ratios: 16:9, 9:16, 1:1, 4:3, 3:4 |
| API access | Limited / staged access via Volcengine Ark | Public beta Apr 2, 2026; broadly available to developers |
Verified against ByteDance Seed launch post (Feb 12, 2026) and Volcengine Ark documentation.
Try Seedance 2.0 now
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People also ask
When was Seedance 2.5 released?▾
Seedance 2.5 was officially launched July 31, 2026. The launch post initially said API access was coming soon; BytePlus subsequently documented live access under `dreamina-seedance-2-5-260628`.
When was Seedance 2.0 released?▾
Seedance 2.0 was released February 12, 2026 and remains a supported Seedance 2.x API model, but it is no longer the newest API-accessible generation. BytePlus now documents Seedance 2.5 under `dreamina-seedance-2-5-260628`.
What version of Seedance is current?▾
Seedance 2.5 is the newest official generation and is API-accessible through current BytePlus documentation under `dreamina-seedance-2-5-260628`. Seedance 2.0 remains supported for existing Seedance 2.x integrations.
Is there a Seedance 3.0?▾
No. As of August 2, 2026, ByteDance has not announced Seedance 3.0 — no roadmap, no specifications, no timeline, no Volcengine Ark placeholder. Any "Seedance 3.0 release date" quoted today is speculation, not reporting. The newest official generation is Seedance 2.5.
What is the difference between Seedance 2.0 and 2.5?▾
Seedance 2.5 doubles the single-clip ceiling from 15 to 30 seconds, expands per-request reference inputs from roughly 12 files on 2.0 to up to 30 images + 10 videos + 10 audio clips, adds clay-render / motion / creative reference types, and introduces timestamp-level editing. Seedance 2.0 remains the callable API model with a documented 480p→4K pricing ladder; the 2.5 rate card lists 480p and 720p only, priced roughly 50% above the equivalent 2.0 tier per BytePlus ModelArk documentation.
What is the difference between Seedance 1.5 Pro and 2.0?▾
Seedance 1.5 Pro (late 2025) added native audio-visual sync and director controls to the 1.x line. Seedance 2.0 (Feb 12, 2026) unified the Pro/Lite tiering, raised resolution to 1080p, extended clips to 12 seconds, added five aspect ratios, and made audio a standard feature rather than a Pro-only addition.
Did Seedance 2.0 replace Seedance 1.5 Pro?▾
Yes. Seedance 2.0 superseded all 1.x versions. Existing 1.5 Pro API integrations remain accessible on Volcengine Ark for backward compatibility, but new work should target the 2.0 endpoint until the 2.5 API opens on BytePlus ModelArk.
Frequently asked questions about Seedance releases
When did Seedance 2.5 API access become available?▾
Yes. ByteDance's July 31 launch post described API access as coming soon at that time. BytePlus subsequently published live enhanced video-generation documentation that lists `dreamina-seedance-2-5-260628` as supported. Status verified September 8, 2026.
Where can Seedance 2.5 be used today?▾
Two ByteDance-owned consumer surfaces confirmed by the official launch post: Jimeng AI (jimeng.jianying.com) and the Pro version of Doubao. Both are China-facing consumer products. There is no official English-language ByteDance consumer surface for Seedance 2.5, and no callable BytePlus ModelArk endpoint yet.
What are the confirmed Seedance 2.5 capabilities today?▾
From the official ByteDance Seed launch post (Jul 31, 2026): 30-second high-quality audio-video generation in a single pass with multi-round extension for longer sequences; multimodal reference input of up to 30 images, 10 videos, and 10 audio clips per request; strengthened clay-render, motion, and creative reference types; and improvements to shot transitions and scene changes. Native 4K, exact resolution ladder, and DCC-tool integrations were not confirmed in the launch post.
Where can I find the official Seedance announcements?▾
ByteDance Seed publishes launch posts at seed.bytedance.com — the Seedance 2.0 post (February 12, 2026) is at seed.bytedance.com/en/blog/official-launch-of-seedance-2-0 and the Seedance 2.5 post (July 31, 2026) is at seed.bytedance.com/en/blog/one-take-creation-flexible-referencing-introducing-seedance-2-5. Volcengine Ark hosts API documentation and release notes at volcengine.com/product/ark; BytePlus ModelArk hosts the international pricing and model list at docs.byteplus.com/docs/ModelArk.
Is there a Seedance 2.0 or 2.5 changelog?▾
ByteDance does not publish a public changelog in the conventional software sense. Version history is reconstructed from ByteDance Seed launch posts, Volcengine and BytePlus ModelArk model catalogs, and verified third-party tech press (TechNode, RuntimeWire, Wikipedia).
Why is Seedance 2.5 not available on a standalone Western app?▾
ByteDance distributes Seedance via API (Volcengine Ark and BytePlus ModelArk for developers) and via Doubao and Jimeng for Chinese consumers. There is no single official English or Western consumer app for either 2.0 or 2.5. Third-party operators like seedance2-video.com currently wrap the Seedance 2.0 API and will update to 2.5 only once the ModelArk endpoint is callable.
When did the Seedance 2.0 API become publicly available?▾
The Seedance 2.0 API on Volcengine Ark entered public beta on April 2, 2026. It remains supported, while BytePlus now also documents the newer Seedance 2.5 endpoint.
Is Seedance 1.5 Pro still available?▾
The 1.5 Pro API endpoint remains accessible on Volcengine Ark for backward compatibility, but ByteDance recommends migrating to the 2.0 endpoint. No new accounts are provisioned specifically for 1.5 Pro as of August 2, 2026.
How often does ByteDance release new Seedance versions?▾
Faster than the 1.x era. Historical cadence: 1.0 (June 2025) → 1.5 Pro (late 2025) → 2.0 (February 12, 2026, 8 months from 1.0) → 2.5 announced (June 23, 2026) → 2.5 officially launched (July 31, 2026, ~5.5 months after 2.0). ByteDance does not publish a fixed schedule for future releases.
Sources
- ByteDance Seed's July 31, 2026 launch post confirmed 30-second generation, up to 30 image + 10 video + 10 audio references, and stated at that time that BytePlus API access was coming soon. BytePlus subsequently published live 2.5 API documentation. — ByteDance Seed, 2026-07-31
- TechNode reports the July 31, 2026 Seedance 2.5 launch: 30-second single-pass generation, multi-turn extension, up to 30 images plus 10 videos plus 10 audio references, rollout on Jimeng AI and the Pro version of Doubao, and API access "expected to arrive soon on Volcano Engine's Ark platform." — TechNode, 2026-07-31
- Seedance 2.0 was officially announced by ByteDance Seed on February 12, 2026, as a unified multimodal audio-video model replacing the 1.x Pro/Lite tiering. — ByteDance Seed, 2026-02-12
- The Seedance 2.0 API entered public beta on April 2, 2026 and remains a supported Seedance 2.x model. BytePlus now also documents Seedance 2.5 under `dreamina-seedance-2-5-260628`. — Volcengine, 2026-04-02
- Per TechNode (March 5, 2026), Seedance 2.0 API billing on Volcengine Ark is approximately 46 CNY per million tokens for pure generation, an effective rate of roughly $0.14 per second of output. — TechNode, 2026-03-05
- Wikipedia's Seedance 2.0 entry documents the release history and distribution channels, confirming no separate English consumer app from ByteDance. — Wikipedia
Related pages
This page is operated by Vividra Labs LLC (Delaware), an independent third-party integrator using the official Seedance 2.0 API via Volcengine Ark. We are not affiliated with or endorsed by ByteDance. Dates and capability claims are verified August 2, 2026 against ByteDance Seed launch posts (Feb 12, 2026 for 2.0; Jul 31, 2026 for 2.5), Volcengine Ark, BytePlus ModelArk, and TechNode primary sources.