Velokey

Doubao Seed Evolving

字节跳动Chatin 0.9 · out 4.5 Credits / 1M tokens≈$0.9 / $4.5Available
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Doubao Seed Evolving is ByteDance's continually-evolving frontier Seed model that stays up to date through ongoing updates, with multimodal understanding, deep thinking, and agentic tool use. Access it through Velokey's unified endpoint with below-list pricing.

Continually evolving, always latestMultimodal understandingDeep-thinking reasoningAgentic tool use

Use cases

Always-up-to-date AI apps · Multimodal understanding & analysis

Input

Text, image

Output

Text

Billing

Per token

0.7
02
2048
2568192
doubao-seed-evolving

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Sign up to get $0.5 in free credits — about 20 free images

Pricing details

Transparent usage-based pricing with no hidden fees.

Detailed Pricing

Usage-based pricing breakdown

SpecPrice
Input/1M tokens0.9 Credits≈$0.9
Output/1M tokens4.5 Credits≈$4.5
Cache Read/1M tokens0.18 Credits≈$0.18

Billing Rules

  • Output price varies by model, resolution, quality, duration, or token usage.
  • Uploaded reference files may be charged separately when supported.
  • Add-on capabilities such as web search or image search may be billed per request.
  • Token-based models are billed by input and output tokens.
  • If the primary route is unavailable, Velokey may automatically switch to a stable fallback route when possible.
  • Usage is pay-as-you-go with transparent credit deduction.

* Final cost depends on the generated result.

Related models

Explore other models in the same family.

Affordable Doubao Seed Evolving API

Access ByteDance's Doubao Seed Evolving on Velokey — a continually-evolving, always-up-to-date frontier Seed model with multimodal understanding, deep thinking, and agentic tool use, plus a unified endpoint and below-list pricing for production apps.

Meet Doubao Seed Evolving and its API access

Doubao Seed Evolving is a continually-evolving frontier model in ByteDance's Doubao Seed family that keeps improving over time via ongoing updates, positioned as an always-up-to-date frontier Seed model. It offers strong multimodal understanding across text, image, video, document, and audio; a built-in deep-thinking/reasoning mode for complex multi-step tasks; agentic tool use and function calling; and long context. Integrate once and keep getting the latest frontier capabilities as the model updates. Velokey provides an affordable, easy-to-integrate Doubao Seed Evolving API: a unified chat endpoint, a clear request flow, and below-list pricing for production systems, agent pipelines, and automation tools.

Continually evolving, always latest

Through ongoing iterative updates, the model keeps improving over time, so the same model id delivers the latest frontier capabilities without switching versions.

View Documentation →
Continually evolving, always latest

Multimodal understanding

Accepts text, image, video, document, and audio input, understanding and analyzing complex multimodal content and producing structured results.

View Documentation →
Multimodal understanding

Deep-thinking reasoning

A built-in deep-thinking/reasoning mode excels at decomposing and executing complex instructions and multi-step tasks, staying stable on long-chain reasoning.

View Documentation →
Deep-thinking reasoning

Agentic tool use

Supports agentic tool use and function calling, auto-orchestrating retrieval, tool calls, and multi-step tasks — fit for building agent pipelines.

View Documentation →
Agentic tool use

How to deploy the Doubao Seed Evolving API on Velokey

Get started with just a few steps.

1

Sign up and get an API Key

Sign in to the Velokey console to generate an API Key that authenticates every request sent to Doubao Seed Evolving.

2

Configure request parameters

Set model to doubao-seed-evolving and submit messages. Enable the deep-thinking mode and use the long context for complex long-chain tasks.

3

Integrate and start calling

Send requests to Velokey's unified /v3/chat/completions or /v3/responses endpoint to power multimodal and agent pipelines, with usage managed in one console.

Real-world use cases for Doubao Seed Evolving

From always-up-to-date AI apps to multimodal analysis, covering many scenarios.

Always-up-to-date AI apps

The model keeps evolving — integrate once and keep getting the latest capabilities, fit for products that want to stay at the frontier long term.

Agent & tool use

Supports deep thinking and agentic tool use, auto-orchestrating retrieval and multi-step tasks — fit for building autonomous agent pipelines.

Multimodal understanding & analysis

Accepts text, image, video, document, and audio — fit for complex content understanding, cross-modal analysis, and structured extraction.

Document & video understanding

Parses document and video content — fit for content review, information extraction, and multimodal QA.

Grounded QA & information extraction

Strong on information extraction, grounded QA, and text analysis — fit for enterprise batch processing.

Tool-augmented workflows

Supports Function Call, web search, knowledge base, and MCP — fit for retrieval-augmented and tool-augmented workflows.

Why choose Velokey for Doubao Seed Evolving

Discount on list price

Call Doubao Seed Evolving at a lower price on Velokey — pay-as-you-go with no forced subscription, reducing upfront cost.

Unified API interface

One API Key accesses Doubao Seed Evolving and other models — no juggling multiple accounts and keys, simplifying integration.

Always the latest capabilities

The model keeps evolving — the same model id keeps delivering the latest frontier capabilities without switching versions.

Stable and highly available

Automatic failover and stable fallback routes maintain availability when the primary route is down, keeping production reliable.

API Reference

Complete API call examples and parameter descriptions

Endpoint

https://api.velokey.ai/v1/chat/completions

Authentication

Bearer YOUR_API_KEY

Request Example

curl https://api.velokey.ai/v1/chat/completions \
  -X POST \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "doubao-seed-evolving",
    "messages": [{"role": "user", "content": "Hello!"}],
    "temperature": 0.7
  }'

Response Example

{
  "id": "req_abc123",
  "model": "doubao-seed-evolving",
  "created": 1234567890,
  "data": { ... }
}

Doubao Seed Evolving API FAQ

What is Doubao Seed Evolving?

It is a continually-evolving frontier model in ByteDance's Doubao Seed family that keeps improving over time via ongoing updates. It offers multimodal understanding, a deep-thinking/reasoning mode, agentic tool use and function calling, and long context, positioned as an always-up-to-date frontier Seed model. The request model id is doubao-seed-evolving.

What does "continually evolving" mean?

Doubao Seed Evolving keeps improving through ongoing update iterations. You don't need to switch to a new model version — the same model id gives you the latest frontier capabilities as they improve over time, keeping your application always up to date.

Which modalities and capabilities are supported?

It accepts multimodal input across text, image, video, document, and audio, with a built-in deep-thinking/reasoning mode for complex multi-step tasks, plus agentic tool use and function calling. Paired with long context, it fits long-chain and tool-augmented workflows.

What tools and APIs are available?

It supports Function Call, web search, knowledge base, and MCP, plus agentic tool orchestration. APIs include Chat Completions (/v3/chat/completions), Responses (/v3/responses), and Tokenization — fit for information extraction, grounded QA, and multimodal analysis.

How is it billed on Velokey?

On Velokey, Doubao Seed Evolving is billed at 0.9 Credits input / 4.5 Credits output per million tokens. This page's pricing area shows the current Velokey price, billed by input and output tokens with a discount on list price.

Start building with Doubao Seed Evolving today

Use one API key to access low-cost, stable AI models through Velokey.

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