Model introduction
doubao-seed-2.1-pro is a ByteDance model available through MoleAPI with openai access. It fits OpenAI compatible workflows, with pricing synced from the MoleAPI console.
Model capabilities
Specifications come from the cited model material. Catalog tags help identify access features; use the source documentation for exact limits.
Verified specifications
- Catalog status
- Currently available on MoleAPI
- Compatible protocols
- openai
- Available billing groups
- Standard
Sources: MoleAPI console pricing catalog
Model pricing and access
Prices are read directly from the MoleAPI console catalog and shown by current billing group and context tier.
Your final charge follows the account group shown in the console.
Live pricing source
Pricing table
USD / 1M tokensStandardx1defaultInput $0.9 · Output $4.5
Input
$0.9 / 1M tokens
Output
$4.5 / 1M tokens
Access protocols
Available billing groups: Standard
- openai
- POST
- /v1/chat/completions
Complete model guide
Prepared from vendor sources and independently reviewed. · 2026-07-28
Positioning and core capabilities
Doubao-Seed-2.1-Pro is ByteDance’s flagship-grade general agent model in the Seed 2.1 family, positioned for real-world productivity workflows and multi-step task execution. [8] It supports deep reasoning, text generation, multimodal understanding, tool calling, and structured output. [4]
The model is designed to work with text and multimodal inputs, including documents, charts, images, and video. [8] Volcano Engine recommends json_schema for structured output. [4]
Capabilities and specifications
Doubao-Seed-2.1-Pro combines agent-oriented reasoning, multimodal analysis, tool use, and structured response generation. [4] Its published context and generation limits support long-context workloads. [4]
| Specification | Published value |
|---|---|
| Context window | 256K tokens [4] |
| Maximum input | 256K tokens [4] |
| Maximum output | 256K tokens; 4K default [4] |
| Maximum reasoning-chain allowance | 256K tokens [4] |
| Listed throughput ceiling | 500 RPM and 1,000,000 TPM [4] |
Volcano Engine describes the listed RPM and TPM ceilings as non-rigid limits that can vary by platform load and invocation method. [4]
Use cases
Doubao-Seed-2.1-Pro is positioned for agent workflows that combine project planning, document processing, tool use, information analysis, solution design, content planning, and result consolidation. [8]
ByteDance also positions Seed 2.1 Pro for enterprise software development across requirements analysis, feature implementation, bug fixing, environment setup, and result validation. [8] Its multimodal positioning covers complex document, chart, numerical, visual, and video understanding tasks. [8]
Material limitations
The model’s documented throughput limits are not guaranteed fixed quotas and may change with platform conditions and the calling method. [4] Although the published maximum output is 256K tokens, the documented default output setting is 4K tokens. [4]
Sources
Code examples
These examples use MoleAPI's OpenAI-compatible endpoint and run after you replace the API key.
curl https://api.moleapi.com/v1/chat/completions \
-H "Authorization: Bearer $MOLEAPI_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "doubao-seed-2.1-pro",
"messages": [{"role": "user", "content": "Hello"}]
}'Frequently asked questions
How is doubao-seed-2.1-pro priced?
This page reads prices from the MoleAPI console API and updates with model prices, context tiers, and account groups.
How can I access doubao-seed-2.1-pro?
Protocols and endpoints come from the supported_endpoint_types field in the MoleAPI model catalog.
How do I switch an existing project to doubao-seed-2.1-pro?
Keep the MoleAPI API address and key, replace the model parameter with the model ID on this page, then check protocol-specific parameter differences.
Where do the doubao-seed-2.1-pro model details come from?
Only availability, billing, and protocol facts from the MoleAPI catalog are currently verified, so unconfirmed model specifications are not added.