Reportedly: ByteDance releases Seedream 5.5 image model, integrated into Doubao, Doubao Work, and Jimeng
Reported by Leiphone · not yet confirmed by the company or a second independent outlet. We update this page when it is.
ByteDance released Seedream 5.5, with faster generation, improved multi-turn editing stability, native RGBA transparency support, and better realism and small-text rendering. It is now available in Doubao, Doubao Work, and Jimeng, with API coming soon to Volcano Ark. API pricing for 2K square image editing is about RMB 0.28 per image, less than half of Seedream 5.0 Pro, Leiphone reported.
China context
- Original name
- 字节跳动
- Outside China
- Not stated in the sources yet
- Claims
- Company-reported; not yet independently evaluated
- For builders
- Developers outside China can monitor the Volcano Ark API launch for potential access, but no international availability is confirmed. The model's RGBA output and multi-turn editing stability are relevant for building design and e-commerce tools.
- For investors
- The price reduction to less than half of Seedream 5.0 Pro may pressure competitors' pricing in the image generation market. ByteDance's expansion into professional workflows and planned Pro version indicate continued investment in visual AI.
Translated from Chinese. Quotes and facts link to the original sources.
ByteDance officially released Seedream 5.5, an image creation model, on November 9, 2026. Compared with Seedream 5.0 Pro, the new model significantly improves generation speed, enhances multi-turn editing stability, natively supports transparent asset generation, and optimizes image realism and small-text rendering. It is currently integrated into Doubao, Doubao Work, and Jimeng, with API access coming soon to Volcano Ark. Pricing continues the two-part billing structure of input image plus output image, with no charge for text tokens. For 2K square image editing, the cost per image is about RMB 0.28, less than half that of Seedream 5.0 Pro. In multi-turn editing, Seedream 5.5 shows stronger instruction following and pixel-level preservation of non-edited regions; in tests, after over 100 consecutive rounds of modifications, subject features, composition, lighting, and style outside the specified edit area remained consistent. The model natively supports RGBA transparent asset generation and splitting, outputting images with alpha channels and supporting layered asset output. It also improves realism in lighting, materials, and skin texture, reducing over-gloss and overexposure. Small-text rendering, especially for complex Chinese characters at small sizes, is enhanced for infographics and knowledge diagrams. Based on MagicArena platform tests, Seedream 5.5 shows significantly improved usability rates over Seedream 5.0 Pro in six scenarios: e-commerce, marketing, film, gaming, office, and fashion design. ByteDance stated that a Pro version of Seedream 5.5 will be released later, supporting more complex context input and creation instructions, and the team will expand the model's application in agent workflows for film, e-commerce, advertising, and design.
Seedream 5.5 introduces native RGBA output with alpha channels and layered asset splitting, enabling direct use of transparent materials in design workflows. Multi-turn editing stability is demonstrated by pixel-level preservation of non-edited regions over 100 consecutive edits. The model shows improved instruction following and better handling of lighting, materials, and skin texture for realistic scenes. Small-text rendering, particularly for complex Chinese characters, is enhanced. The API uses a two-part billing structure (input image + output image) with no charge for text tokens.
ByteDance's Seedream 5.5 cuts the cost of 2K square image editing to about RMB 0.28 per image, less than half of Seedream 5.0 Pro, making high-quality image generation more affordable for e-commerce, marketing, and design users. The model's native transparency support and multi-turn editing stability directly address professional creative workflows, potentially reducing the need for manual post-processing and enabling faster iteration in product visualization and content production.
Seedream 5.5's lower API pricing and improved capabilities could attract cost-sensitive users in e-commerce and marketing, where image generation volume is high. The native transparency support and multi-turn editing stability address pain points in design and game asset creation, potentially increasing adoption among professional users. The planned Pro version and agent workflow expansion suggest ByteDance aims to capture more of the enterprise visual content creation market.
ByteDance plans to release a Pro version of Seedream 5.5 with support for more complex context input and creation instructions. The team will expand the model's application in agent workflows for film, e-commerce, advertising, and design. Specific signals to watch include the API launch on Volcano Ark, the release date and capabilities of the Pro version, and independent benchmarks comparing Seedream 5.5's usability rates against competitors in the six tested scenarios.