doubao · Balanced

Doubao Seed 2.1 Turbo

Added Jun 23, 2026

Fast, lower-cost model in the Doubao Seed 2.1 family for everyday chat, coding assistance, document work, and high-throughput productivity tasks. 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: $0.50
Output: $2.50

Reference prices as published by the model provider. API example

Specifications

Context window: 256K
Max output: 128K

Side by side

Doubao Seed 2.1 Turbo compared

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

Limits
	Doubao Seed 2.1 TurbodoubaoThis model	GPT-3.5 TurboOpenAIRemove
Provider	doubao	OpenAI
Discovery tier	Balanced	Balanced
Added	Jun 23, 2026	Jan 1, 2024
Context window	256KBest	16.39K
Max output	128KBest	4.1K
Pricing, USD per 1M tokens
Input	$0.50	$0.50
Output	$2.50	$1.50Best
Benchmark indexes
Intelligence Index	—	5.5
Coding Index	—	10.7
Capabilities
Reasoning effort	—	—

Public evaluations

Benchmarks

Independent evaluation results, with how each score ranks among the models in the Noumen catalog.

Doubao Seed 2.1 Turbo
GPT-3.5 Turbo

Intelligence Index

Doubao Seed 2.1 Turbo—
GPT-3.5 Turbo5.5

3.8Catalog models by score55.1

Indexes

Coding Index
Composite of the coding evaluations
- Doubao Seed 2.1 Turbo: —
- GPT-3.5 Turbo: 10.7

Reasoning and knowledge

GPQA Diamond
Graduate-level science questions
- Doubao Seed 2.1 Turbo: —
- GPT-3.5 Turbo: 29.7%
MMLU-Pro
Multi-subject knowledge and reasoning
- Doubao Seed 2.1 Turbo: —
- GPT-3.5 Turbo: 46.2%

Math

MATH-500
Competition math problems
- Doubao Seed 2.1 Turbo: —
- GPT-3.5 Turbo: 44.1%

Scores from Artificial Analysis, updated Oct 26, 2026.

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-turbo",
    "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-turbo",
    messages=[{"role": "user", "content": "Explain this stack trace."}],
)
print(reply.choices[0].message.content)

doubao

Other doubao models, starting with the same family.

Doubao Seed 2.1 Turbo

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