What is Doubao Seed 1.8's context window?

Doubao Seed 1.8 supports a context window of 256,000 tokens, allowing you to process large documents and maintain long conversations.

How to use Doubao Seed 1.8 API via Ofox?

Simply set your base URL to https://api.ofox.ai/v1 and use your Ofox API key. The API is OpenAI-compatible — just change the base URL and API key in your existing code.

Doubao Seed 1.8

Name: Doubao Seed 1.8
Brand: volcengine
Price: 0.12 USD
Availability: InStock
Rating: 5 (1 reviews)

Chat

volcengine/doubao-seed-1-8

CompareGet Started

Doubao Seed 1.8 is ByteDance's next-generation Doubao model, served through Volcengine, with improved reasoning, enhanced capabilities, and better overall performance than the previous Seed generation. It supports reasoning, tool use (function calling), and prompt caching, and it is the newest member of the Doubao Seed line on Ofox: pricing matches Seed 1.6 at $0.12/M input tokens and $0.023/M cache reads, so existing integrations can move over without a cost change. Unlike the 1.6 models it is also reachable over the native Anthropic protocol. Context: 256K tokens, output: 64K. Released 2025-12-28. Available via OpenAI and Anthropic protocols through Ofox.

Context Window

256K

Max Output Tokens

64K

Released

2025-12-28

Capabilities

Function CallingReasoningPrompt Caching

Available Providers

Volcengine

Supported Protocols

openaianthropic

Providers

Volcengine

Input Tokens

$0.12/M

Output Tokens

$0.29/M

Cache Read

$0.023/M

Protocols

openai/v1/chat/completions/v1/responses

anthropic

Code Examples

from openai import OpenAI

client = OpenAI(
    base_url="https://api.ofox.ai/v1",
    api_key="YOUR_OFOX_API_KEY",
)

response = client.chat.completions.create(
    model="volcengine/doubao-seed-1-8",
    messages=[
        {"role": "user", "content": "Hello!"}
    ],
)

print(response.choices[0].message.content)