Doubao SEED 2.1 Turbo API
The faster, cheaper tier of the Doubao SEED 2.1 family. A 256K context window and 256K max output at roughly $0.42/$2.08 per 1M tokens make it the default for high-volume Chinese-language workloads.
💰 Save up to 70% vs official ByteDance pricingDoubao SEED 2.1 Turbo — cheaper than the official ByteDance API
Access Doubao SEED 2.1 Turbo through AI API Hub and pay less per token. Same OpenAI-compatible endpoint, lower cost.
Technical Specifications
| Provider | ByteDance |
| Model Family | Doubao SEED 2.1 Turbo |
| Release Date | 2026-06 |
| Context Window | 256K |
| Max Output Tokens | 262,144 |
| Input Price | $0.42 / 1M tokens |
| Output Price | $2.08 / 1M tokens |
| Vision Support | No |
| Function Calling | No |
| JSON Mode | No |
| Streaming | Yes ✓ |
| Fine Tuning | Not Available |
| Status | Active ✓ |
Overview
Doubao SEED 2.1 Turbo is ByteDance's current doubao model, released in 2026-06. The faster, cheaper tier of the Doubao SEED 2.1 family. A 256K context window and 256K max output at roughly $0.42/$2.08 per 1M tokens make it the default for high-volume Chinese-language workloads.
For developers, the headline numbers are a 256K context window and up to 262,144 output tokens per response — enough headroom for good cost-performance and 256k context without chunking your input. Priced at $0.42/1M input and $2.08/1M output, it sits in the budget tier — ideal for high-volume pipelines where token cost dominates.
On the capability side, Doubao SEED 2.1 Turbo exposes 3 features: Chinese, Low Latency, Streaming. Note that fine-tuning isn't supported — you'll work with the base model. It's text-only, so route image or audio workloads elsewhere.
The practical appeal of routing Doubao SEED 2.1 Turbo through AI API Hub is simplicity: one OpenAI-compatible endpoint, USDT & USDC payments, no credit card, and you're calling the API in under 30 seconds — just swap your base URL.
What Makes Doubao SEED 2.1 Turbo Different
How Doubao SEED 2.1 Turbo is used
Doubao SEED 2.1 Turbo is used for general-purpose text tasks — chat, summarization, drafting, classification, and extraction. It handles the standard text-in/text-out case reliably. For specialized workloads (coding, reasoning, vision), a purpose-tuned sibling may perform better.
Pricing position within ByteDance
Doubao SEED 2.1 Turbo sits in the middle of ByteDance's pricing at $0.42/1M input — 24% above the lineup average ($0.03 cheapest, $0.83 most expensive). 2 siblings cost less, 1 cost more. This mid-tier positioning makes it a sensible default when you're unsure which variant to pick.
Doubao SEED 2.1 Turbo's role in the lineup
Within ByteDance's lineup, Doubao SEED 2.1 Turbo is a mid-tier option — balanced between cost and capability. The doubao family has 4 active variants, and Doubao SEED 2.1 Turbo occupies the upper end. This makes it a safe default for production workloads where you're not sure which tier to pick.
Real-world use cases
Real-world deployments: customer support chatbots, content drafting and summarization, classification pipelines, and extraction workflows. Doubao SEED 2.1 Turbo handles the standard text-in/text-out case reliably — route specialized tasks (vision, coding, reasoning) to purpose-tuned siblings.
vs sibling models
What makes Doubao SEED 2.1 Turbo different from sibling models: compared to Doubao SEED 2.1 Pro ($0.41/1M more expensive, same 256K context); Doubao SEED 2.0 Lite ($0.34/1M cheaper, 128K vs 256K context (smaller)); Doubao SEED 2.0 Mini ($0.39/1M cheaper, 128K vs 256K context (smaller)). Choose Doubao SEED 2.1 Turbo when a balanced cost-to-capability ratio fits your workload.
API Examples
Python
from openai import OpenAI
client = OpenAI(
api_key="YOUR_API_KEY",
base_url="https://api.apiyihe.org/v1"
)
response = client.chat.completions.create(
model="doubao-seed-2.1-turbo",
messages=[
{"role": "user", "content": "Hello"}
]
)
print(response.choices[0].message.content)JavaScript / Node.js
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.API_KEY,
baseURL: "https://api.apiyihe.org/v1"
});
const response = await client.chat.completions.create({
model: "doubao-seed-2.1-turbo",
messages: [
{ role: "user", content: "Hello" }
]
});
console.log(response.choices[0].message.content);cURL
curl https://api.apiyihe.org/v1/chat/completions \
-H "Content-Type: application/json" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
"model": "doubao-seed-2.1-turbo",
"messages": [
{"role": "user", "content": "Hello"}
]
}'Supported Features
| Vision / Image Input | ❌ Not Available |
| Audio / Voice Input | ❌ Not Available |
| Function Calling | ❌ Not Available |
| JSON Mode | ❌ Not Available |
| Streaming | ✅ Supported |
| Fine-Tuning | ❌ Not Available |
| Multimodal | ❌ Not Available |
Benchmark Scores
| Benchmark | Score |
|---|---|
| MMLU | Not Publicly Available |
| GPQA | Not Publicly Available |
| SWE-Bench | Not Publicly Available |
| HumanEval | Not Publicly Available |
| GSM8K | Not Publicly Available |
| MATH | Not Publicly Available |
| MMMU | Not Publicly Available |
Pricing History
Doubao SEED 2.1 Turbo was released in 2026-06 by ByteDance and is currently publicly available via AI API Hub.
Current Pricing: $0.42 per 1M input tokens · $2.08 per 1M output tokens. Pay-as-you-go with no minimum commitment.
Pricing Model: Token-based billing (pay per use). No subscription fees. No hidden costs.
💡 ByteDance occasionally updates pricing. AI API Hub reflects current pricing in real-time. All prices in USD. Pay with USDT or USDC — no currency conversion fees.
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Frequently Asked Questions
What is Doubao SEED 2.1 Turbo?
Doubao SEED 2.1 Turbo is ByteDance's current doubao model. The faster, cheaper tier of the Doubao SEED 2.1 family. A 256K context window and 256K max output at roughly $0.42/$2.08 per 1M tokens make it the default for high-volume Chinese-language workloads. It offers a 256K context window and supports Chinese, Low Latency, Streaming. You can access it through AI API Hub using USDT or USDC — no credit card required.
How much does Doubao SEED 2.1 Turbo cost?
Doubao SEED 2.1 Turbo is priced at $0.42 per 1M input tokens and $2.08 per 1M output tokens, billed pay-as-you-go with no minimum. Through AI API Hub you can start with as little as $5 and scale from there.
Doubao SEED 2.1 Turbo vs GPT-6 Astra?
They're built for different jobs. Doubao SEED 2.1 Turbo costs $0.42/1M input with a 256K window; GPT-6 Astra runs $10.00/1M input with 1M. Doubao SEED 2.1 Turbo is the more cost-effective pick and still brings good cost-performance. See the full side-by-side at /compare/doubao-seed-2.1-turbo-vs-gpt-6-astra/.
Doubao SEED 2.1 Turbo context window?
Doubao SEED 2.1 Turbo has a 256K context window, capable of processing up to 262,144 tokens in a single request. Maximum output tokens: 262,144.
Does Doubao SEED 2.1 Turbo support function calling?
No, Doubao SEED 2.1 Turbo does not natively support function calling. For function calling use cases, consider ByteDance's flagship models.
Is Doubao SEED 2.1 Turbo multimodal?
No, Doubao SEED 2.1 Turbo is a text-only model. For multimodal use cases, consider models with vision/audio capabilities.
Doubao SEED 2.1 Turbo API rate limits?
Doubao SEED 2.1 Turbo rate limits: 10K RPM. Higher tier plans offer increased throughput. For high-volume production use, consider ByteDance's faster variant models.
How to access Doubao SEED 2.1 Turbo API?
Access Doubao SEED 2.1 Turbo through AI API Hub: (1) Register at z.apiyihe.org/register?aff=ZVtr, (2) Deposit USDT/USDC, (3) Get your API key instantly, (4) Use the OpenAI-compatible endpoint https://api.apiyihe.org/v1 with model name "doubao-seed-2.1-turbo". Start building in under 30 seconds.