ByteDance: Doubao-Seed-2.1-Turbo

Faster ByteDance Seed 2.1 model for multimodal reasoning and latency-sensitive agent workflows

doubao-seed-2.1-turbo

AvailableByteDanceChat

Input / Output: $0.50 / $2.50
Context: 256K
Max output: 256K
Modalities: VisionChat
Capabilities: Tool usePrompt CacheReasoning

About Doubao-Seed-2.1-Turbo

Doubao-Seed-2.1-Turbo is the smaller, efficiency-oriented model in ByteDance's Seed 2.1 pair, released in June 2026 alongside Pro. ByteDance aims it at large-scale production scenarios where agent and coding quality must come at lower latency. It takes text and images, calls tools, reasons, and also supports JSON schema output and prompt caching.

Where it works well

Meant for scaled production use: ByteDance says it stays competitive with Pro on most benchmarks while needing fewer resources.
Shares the Seed 2.1 focus on coding engineering, long agent task chains and multimodal understanding.
Supports schema-bound JSON output, unlike Seed 2.1 Pro and Lite, which helps pipelines that parse every reply.
Handles images with text and calls tools, so one model can serve both chat and agent paths.
Latency-sensitive agent loops benefit from its lower response time on each step.

When to choose another model

Seed 2.1 Pro generally outperforms it on ByteDance's benchmarks, so the hardest tasks may need escalation.
Video understanding described for the Seed 2.1 family is not accepted as input; the model takes text and images.

Getting started

Create API key
Create a key in Console, then use it with every model on the platform.
02
Send your first request
Copy the example for your language and run it against the endpoint.
Text to textResponses API
POST/v1/responses
API format:
curl https://api.tokenlab.sh/v1/responses \ -H "Content-Type: application/json" \ -H "Authorization: Bearer sk-xxx" \ -d '{ "model": "doubao-seed-2.1-turbo", "input": "Hello!" }'

Pricing

The Verified price applies to Verified, which costs less on most models. The Official price is the model maker's published price and applies to the more reliable Official route. Auto bills the route that completes the request.

Input tokens <= 256K · Text to text

per 1M tokens

Official price: Input $0.50 / Output $2.50 / Cache read $0.10 / Cache write $0.50 / Text Input $0.50 / Text Input · Cache read $0.10 / Image Input $0.50 / Image Input · Cache read $0.10 / Text Output $2.50
Verified price: —
Discount: —

Prompt cache pricing

Cache read

Official price: $0.10
Verified price: —
Discount: —

Cache write

Official price: $0.50
Verified price: —
Discount: —

	Official priceper 1M tokens	Verified priceper 1M tokens	Discount
Input tokens <= 256K · Text to text	Input $0.50 / Output $2.50 / Cache read $0.10 / Cache write $0.50 / Text Input $0.50 / Text Input · Cache read $0.10 / Image Input $0.50 / Image Input · Cache read $0.10 / Text Output $2.50	—	—
Prompt cache pricing
Cache read	$0.10	—	—
Cache write	$0.50	—	—

Usage & activity

Success rate is the share of requests that completed. Latency is how long a full response takes; P95 means 95% of requests finished within that time.

Usage & availability

Last 24 hours

Requests
Success rate
P95 latency
Total tokens

Model performance

Last updated Oct 17, 2026, 11:56 AM UTC

Metrics appear once privacy and data volume thresholds are met.

Data is based on aggregate user requests, excluding status checks.

Open in Console

Open Doubao-Seed-2.1-Turbo in Console with a prompt ready to edit or send.

Help me try doubao-seed-2.1-turbo with a short message at /v1/responses. Show the reply, latency, and cost.

Use cases

Best for

Reasoning
Vision

High-volume agents
Run customer-service or back-office agents that make many tool calls per task and need quick turns.
Schema-driven extraction
Convert emails, forms or screenshots into records that must validate against a JSON schema every time.
Code assistance in products
Power inline suggestions and explanation in a developer-facing feature with tight latency budgets.
First-pass triage
Answer easy requests directly and flag the hard ones for Pro to take over.

Prompt examples

Read this support email and the attached screenshot, then return JSON with product, issue type, severity and suggested reply.

Explain what this function does in two sentences and suggest one refactor, keeping the answer under 80 words.

Look up order 8821 with the tool, check its shipping status, and write a short update for the customer.

This model has conditional pricing. Monthly token totals alone cannot produce a reliable estimate; use the detailed pricing for the request specification, cache, and applicable time window.

FAQ

What exactly is Doubao-Seed-2.1-Turbo?

It is the production-scale model of ByteDance's Seed 2.1 generation, introduced with Pro in June 2026. ByteDance describes it as built for large-scale production scenarios with agent and coding strength at lower resource cost.

Should I pick Turbo or Pro?

Use Turbo for most traffic and Pro for tasks that exceed it. ByteDance says Pro generally scores higher while Turbo remains competitive. Turbo's added JSON schema support can also decide the matter for strict pipelines.

Does Doubao-Seed-2.1-Turbo support structured outputs?

Yes. It supports JSON mode and response schemas, so you can require replies that match a schema. Seed 2.1 Pro and Lite do not support schema-bound output.

Can it read images?

Yes, it accepts images along with text and can reason about screenshots and photos. It also supports tool calling, schema-bound JSON output and prompt caching for repeated long prefixes.

How does it differ from Seed 2.0 Mini?

Mini is the smallest Seed 2.0 size built for throughput, while Turbo is a newer-generation model with stronger agent and coding focus and much larger context. Pick Mini for simple bulk labelling, Turbo for agents.

How much does Doubao-Seed-2.1-Turbo cost?

On TokenLab, Doubao-Seed-2.1-Turbo costs Input $0.50 / Output $2.50 per 1M tokens. The pricing table above shows the full breakdown. Rates depend on the billing unit, specification, and usage. Compare matching conditions in the model's detailed pricing; a single rate does not determine the total cost.

What are the context window and output limit of Doubao-Seed-2.1-Turbo?

Doubao-Seed-2.1-Turbo accepts up to 262,144 tokens of context and returns up to 262,144 tokens in one response.

Which endpoint should Doubao-Seed-2.1-Turbo use?

Use https://api.tokenlab.sh/v1/responses for Doubao-Seed-2.1-Turbo. The request example below shows the matching code shape.

Which operations does Doubao-Seed-2.1-Turbo support?

Doubao-Seed-2.1-Turbo supports Text to text. Select an operation above to see its endpoint and request example.