ByteDance: Doubao-Seed-Character
doubao-seed-character- Input / Output
- $0.1176 / $0.2941
- Context
- 98K
- Max output
- 32K
- Modalities
- VisionChat
- Capabilities
- Tool usePrompt CacheReasoning
About Doubao-Seed-Character
Doubao-Seed-Character is ByteDance's role-play and character-dialogue model from the Doubao Seed line, built for pan-entertainment scenarios such as companion chat, game characters and interactive fiction. It aims to hold a persona steadily across a long conversation, with attention to plot reasoning, dialogue pacing and emotional progression. It accepts text and images and can call tools.
Where it works well
- Targets consistent persona behaviour, so a character keeps its voice and backstory across many turns.
- ByteDance describes upgrades to plot reasoning, dialogue pacing and emotional progression in its character models.
- Accepts images with text, so users can share pictures or memes and have the character respond to them.
- Supports tool calling and JSON output, allowing game state, memory lookups or scene metadata to be handled in the same conversation.
- Prompt caching keeps a long persona sheet and story history reusable across turns of a conversation.
When to choose another model
- It is tuned for character dialogue, so general analysis, coding or research are better served by the general Seed 2.1 or 2.0 models.
- It has no extended thinking mode, which makes it a weaker pick for tasks that need step-by-step deliberation.
Getting started
Create API key
Create a key in Console, then use it with every model on the platform.
Send your first request
Copy the example for your language and run it against the endpoint.
Text to textResponses APIPOST/v1/responsesAPI format:curl https://api.tokenlab.sh/v1/responses \ -H "Content-Type: application/json" \ -H "Authorization: Bearer sk-xxx" \ -d '{ "model": "doubao-seed-character", "input": "Hello!" }'
Pricing
The Verified price applies to Verified, which costs less on most models. The Official price is the model maker's published price and applies to the more reliable Official route. Auto bills the route that completes the request.
Input tokens <= 32K · Text to text · Input token range · [0,32k]
per 1M tokens- Official price
- Input $0.1176 / Output $0.2941 / Cache read $0.0235
- Verified price
- —
- Discount
- —
Input tokens <= 128K · Text to text · Input token range · (32k,128k]
per 1M tokens- Official price
- Input $0.1765 / Output $0.8824 / Cache read $0.0235
- Verified price
- —
- Discount
- —
Cache read
- Official price
- $0.0235
- Verified price
- —
- Discount
- —
| Official priceper 1M tokens | Verified priceper 1M tokens | Discount | |
|---|---|---|---|
| Input tokens <= 32K · Text to text · Input token range · [0,32k] | Input $0.1176 / Output $0.2941 / Cache read $0.0235 | — | — |
| Input tokens <= 128K · Text to text · Input token range · (32k,128k] | Input $0.1765 / Output $0.8824 / Cache read $0.0235 | — | — |
| Prompt cache pricing | |||
| Cache read | $0.0235 | — | — |
Usage & activity
Success rate is the share of requests that completed. Latency is how long a full response takes; P95 means 95% of requests finished within that time.
Usage & availability
Last 24 hours- Requests
- Success rate
- P95 latency
- Total tokens
Data is based on aggregate user requests, excluding status checks.
Open in Console
Open Doubao-Seed-Character in Console with a prompt ready to edit or send.
Help me try doubao-seed-character with a short message at /v1/responses. Show the reply, latency, and cost.
Use cases
Best for- Reasoning
- Vision
Companion apps
Give each companion a persona sheet and let it keep tone, memory cues and emotional arc over weeks of chat.
Game NPC dialogue
Voice non-player characters that respond in character to what the player says or shows.
Interactive fiction
Run a story where the model plays several characters and advances the plot at a sensible pace.
Brand mascots
Answer visitor questions in a mascot voice while staying within rules you set in the system prompt.
Prompt examples
You are Mira, a dry-witted ship engineer on a frontier freighter. Stay in character and answer the captain, who just asked why the engines failed.
A user sent a photo of their dog. Reply as the cheerful companion Pip, and ask a follow-up question about it.
Continue the scene: the detective has just found the missing letter. Voice both the detective and the suspect, and end on a tense line.
This model has conditional pricing. Monthly token totals alone cannot produce a reliable estimate; use the detailed pricing for the request specification, cache, and applicable time window.
FAQ
What exactly is Doubao-Seed-Character?
It is ByteDance Volcano Engine's model for role-play and character dialogue. It is optimised for immersive conversation where a persona has to stay consistent, rather than for general assistant tasks.
What is it good for?
Companion chat, game characters, interactive stories and mascots. ByteDance highlights plot reasoning, dialogue pacing and emotional progression, along with the ability to respond to images and memes.
Does it support images and tools?
Yes. It accepts images with text and supports tool calling, JSON output and prompt caching, so a character can look things up or return structured scene data.
Does Doubao-Seed-Character have a thinking mode?
No. Extended thinking is not available for this model. It answers directly, which keeps replies quick in chat. For reasoning-heavy tasks use a Seed 2.1 model.
Can I use it for customer support?
You can, if you want a branded personality, but a general model such as Seed 2.1 Turbo is usually the better base for support. Use Character when voice and persona consistency are the product.
How much does Doubao-Seed-Character cost?
On TokenLab, Doubao-Seed-Character costs Input $0.1176 / Output $0.2941 per 1M tokens. The pricing table above shows the full breakdown. Rates depend on the billing unit, specification, and usage. Compare matching conditions in the model's detailed pricing; a single rate does not determine the total cost.
What are the context window and output limit of Doubao-Seed-Character?
Doubao-Seed-Character accepts up to 98,304 tokens of context and returns up to 32,768 tokens in one response.
Which endpoint should Doubao-Seed-Character use?
Use https://api.tokenlab.sh/v1/responses for Doubao-Seed-Character. The request example below shows the matching code shape.
Which operations does Doubao-Seed-Character support?
Doubao-Seed-Character supports Text to text. Select an operation above to see its endpoint and request example.
Compare Doubao-Seed-Character
Sources
Reviewed Oct 2, 2026
More from ByteDance