ByteDanceSeed Character
Seed Character
The June Character release adds reasoning and visual input. The older November 2025 release remains listed for text and tool use.
Technical guide
The June release lists structured output. The November release does not list reasoning. Select the dated model instead of assuming both Character versions accept the same inputs.Volcano Engine current model catalog
Practical use
Practical guidance. Keep character instructions separate from user messages. For a visual character assistant, check whether it describes the actual image while maintaining the required voice.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API |
| Model identifiers | doubao-seed-character-260628doubao-seed-character-251128 |
| Limits | 128K context, 96K input and 32K answer.Volcano Engine current model catalog |
Related models
- Seed 2.1 Lite
ByteDance ยท Seed 2.1
Multimodal Seed 2.1 model with a separate System One interface for fixed-choice probabilities and scores.
Launch date not confirmedAPI