Seed 2.1 Pro
by ByteDance SeedChat
Flagship ByteDance Seed 2.1 model for complex multimodal reasoning, coding, and agents
- Context
- 256K tokens
- Max output
- 256,000 tokens
- Released
- 2026-06-23
- Weights
- Closed
bytedance-seed/seed-2-1-pro · also seen as volcengine/doubao-seed-2.1-pro, bytedance/doubao-seed-2.1-pro
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2026-06-23
- Weights
- Closed
- Input
- Text, Image, Video
- Output
- Text
- Context window
- 256,000 max across endpoints
- Max output
- 256,000
- Providers
- 0 + 2 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $0.707 in at Ofox, via gateway, fees not verified
More details
- Last updated
- 2026-06-23
- Knowledge cutoff
Capabilities
Across all endpoints: supported if any endpoint supports it.
- Tool calling
- Parallel toolsunknown
- Structured output
- Reasoning
- Image input
- PDF input
- Audio input
- Audio outputunknown
- Video input
- Prompt cachingunknown
- Web searchunknown
- Computer useunknown
- System messagesunknown
- Assistant prefillunknown
- Temperature
- Streamingunknown
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Cost calculator
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Similarly priced models
Blended rate per 1M tokens, each at its own cheapest provider (10M input : 2M output mix).
| Model | Blended/1M | In/1M | Out/1M | Context | vs Seed 2.1 Pro |
|---|---|---|---|---|---|
| Apertus 70B InstructSwiss AI | $1.17 | $0.82 | $2.92 | 65.5K | −1% cheaper |
| GPT-3.5 TurboOpenAI | $1.17 | $1.00 | $2.00 | 16.4K | −1% cheaper |
| Grok 3 Mini FastxAI | $1.17 | $0.60 | $4.00 | 131K | −1% cheaper |
| Grok Build 0.1xAI | $1.17 | $1.00 | $2.00 | 256K | −1% cheaper |
| Nova ProAmazon | $1.20 | $0.799 | $3.20 | 300K | +2% |
| Pareto 26.10Unbiased AI | $1.20 | $0.80 | $3.20 | 1.05M | +2% |
| Hy4 previewTencent | $1.11 | $0.834 | $2.50 | 1.05M | −6% cheaper |
| Gemini 3.6 FlashGoogle | $1.25 | $0.75 | $3.75 | 1.05M | +6% |
More from ByteDance Seed
Newest ByteDance Seed models in the catalogue. All ByteDance Seed models
| Model | Released | Context | Listed price |
|---|---|---|---|
| Seedream 5.0 Flash | 2026-10-01 | — | unpriced |
| Seed Audio 1.0 | 2026-09-25 | — | unpriced |
| Seedance 2.5 | 2026-08-07 | — | unpriced |
| Seedream 5.0 Pro | 2026-07-11 | — | unpriced |
| Seed 2.1 Turbo | 2026-06-23 | 262K | from $0.50 |
| Seed Evolving | 2026-06-23 | 256K | from $0.891 |
| Seed Character | 2026-06-23 | 256K | from $0.119 |
| Seed 2.1 Pro | 2026-06-23 | 256K | from $0.891 |
Heads up: prices are indicative list rates scraped from provider pricing pages; verify with the provider before relying on them. Report incorrect data for this model