doubao · Balanced

Doubao Seed 2.1 Pro

Added Jun 23, 2026

Higher-capability model in the Doubao Seed 2.1 family for agentic coding, long-context analysis, complex instruction following, and productivity workflows. Supports a 256k context window and up to 128k output tokens. Note: privacy and logging guarantees may be limited.

Input: Text
Output: Text
Discovery tier: Balanced

Pricing

USD per 1M tokens

Input: $1.00
Output: $5.00

Reference prices as published by the model provider. API example

Specifications

Context window: 256K
Max output: 128K
Average output (7 days): 2.7K tokens; Longer than 95% of 465 models

Side by side

Doubao Seed 2.1 Pro compared

Specifications, prices, speed and benchmark scores next to each other. Benchmarks below show every compared model too.

Limits
	Doubao Seed 2.1 ProdoubaoThis model	ByteDance Seed 2.0 CodedoubaoRemove
Provider	doubao	doubao
Discovery tier	Balanced	Balanced
Added	Jun 23, 2026	Aug 11, 2026
Context window	256K	262.14KBest
Max output	128K	131.07KBest
Average output	2.7K tokens	113 tokens
Pricing, USD per 1M tokens
Input	$1.00	$0.50Best
Output	$5.00	$3.00Best
Capabilities
Reasoning	No	Yes
Tools	No	Yes
Vision	No	Yes
Structured output	No	Yes
Video input	No	Yes
Reasoning effort	—	none, low, medium, high

Public evaluations

Benchmarks

There are no public benchmark results for these models yet.

Live routing data

Performance and reliability

Recent averages across requests routed for this model. Your own speed depends on prompt length, reasoning effort and load.

Prompt cache hits: 0.0%

Cache hits are the share of input tokens recently served from a prompt cache across all requests. They are not a forecast of your own hit rate.

Developers

Use it through the API

Noumen’s API is OpenAI-compatible: any Chat Completions client works with a base URL and a key.

Read the quickstart

curl https://www.noumen.xyz/api/v1/chat/completions \
  -H "Authorization: Bearer $NOUMEN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance/doubao-seed-2.1-pro",
    "messages": [{ "role": "user", "content": "Explain this stack trace." }]
  }'

import os
from openai import OpenAI

client = OpenAI(base_url="https://www.noumen.xyz/api/v1", api_key=os.environ["NOUMEN_API_KEY"])
reply = client.chat.completions.create(
    model="bytedance/doubao-seed-2.1-pro",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

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