Seed 2.1 Turbo
by ByteDance SeedChat
Faster ByteDance Seed 2.1 model for multimodal reasoning and latency-sensitive agent workflows
- Context
- 262K tokens
- Max output
- 262,144 tokens
- Released
- 2026-06-23
- Weights
- Closed
bytedance-seed/seed-2-1 · also seen as doubao-seed-2.1-turbo, seed-2-1-turbo, bytedance/seed-2.1-turbo, volcengine/doubao-seed-2.1-turbo, +3 more
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2026-06-23
- Weights
- Closed
- Input
- Text, Image, Video
- Output
- Text
- Context window
- 262,144 max across endpoints
- Max output
- 262,144
- Providers
- 4 + 6 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $0.50–$0.63 in · $2.50–$3.13 out per 1M tokens · 3 of 4 providers have a comparable price
More details
- Last updated
- 2026-08-12
- 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 caching
- Web search
- Computer useunknown
- System messagesunknown
- Assistant prefillunknown
- Temperature
- Streamingunknown
- Attachments
Endpoints
One row per provider and variant; gateways are listed separately.
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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $0.50 in / $2.50 out per 1M tokens at Seed on every data refresh since then.
Tracked from 19 Oct 2026, the earliest refresh this model's headline price can be rebuilt from. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
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 Turbo |
|---|---|---|---|---|---|
| Skyfall 36B V2TheDrummer | $0.592 | $0.55 | $0.80 | 32.8K | +0% |
| Gemini 2.5 FlashGoogle | $0.60 | $0.27 | $2.25 | 1.05M | +2% |
| GPT-4.1 miniOpenAI | $0.60 | $0.40 | $1.60 | 1.05M | +2% |
| Inkling SmallThinking Machines | $0.575 | $0.45 | $1.20 | 1.05M | −2% cheaper |
| Devstral 2Mistral AI | $0.567 | $0.40 | $1.40 | 262K | −4% cheaper |
| mistral-small-4-119b-2603Mistral AI | $0.567 | $0.40 | $1.40 | 262K | −4% cheaper |
| DeepSeek R1DeepSeek | $0.617 | $0.40 | $1.70 | 164K | +5% |
| ERNIE 4.5 VL 424B A47BBaidu | $0.558 | $0.42 | $1.25 | 123K | −5% cheaper |
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 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 |
| Seed 2.1 Turbo | 2026-06-23 | 256K | from $0.445 |