Seed 1.6
by ByteDance SeedChat
ByteDance Seed model for long-context reasoning, instruction following, and tool-assisted tasks
- Context
- 256K tokens
- Max output
- 64,000 tokens
- Parameters
- 230B (total or active not stated)
- Released
- 2025-12-23
- Weights
- Closed
bytedance-seed/seed-1-6 · also seen as doubao-seed-1-6-251015, doubao-seed-1.6, bytedance/seed-1.6, volcengine/doubao-seed-1-6, +1 more
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2025-12-23
- Weights
- Closed
- Input
- Text
- Output
- Text
- Context window
- 256,000 max across endpoints
- Max output
- 64,000
- Providers
- 2 + 5 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $0.119–$0.250 in · $1.19–$2.00 out per 1M tokens · across all 2 providers
More details
- Last updated
- 2025-12-23
- Knowledge cutoff
- 2024-10
- Parameters
- 230B (total or active not stated)
- Developer country
- China
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.
Loading endpoints…
Price history
No change since 19 Oct 2026. The cheapest direct price has been $0.119 in / $1.19 out per 1M tokens at Volcengine Ark on every data refresh since then.
Tracked from 19 Oct 2026. Headline-eligible direct prices only, so a price the sanity check flags never draws a spike. Series as JSON
Cost calculator
Loading endpoints…
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 1.6 |
|---|---|---|---|---|---|
| Seed 2.0 LiteByteDance Seed | $0.542 | $0.25 | $2.00 | 131K | +0% |
| Seed 1.6 (250615)ByteDance Seed | $0.542 | $0.25 | $2.00 | 256K | +0% |
| Seed 1.6 (250915)ByteDance Seed | $0.542 | $0.25 | $2.00 | 256K | +0% |
| Seed 1.8ByteDance Seed | $0.542 | $0.25 | $2.00 | 256K | +0% |
| Qwen3.6 27BAlibaba (Qwen) | $0.543 | $0.203 | $2.24 | 262K | +0% |
| Qwen3 MaxAlibaba (Qwen) | $0.538 | $0.359 | $1.43 | 262K | −1% cheaper |
| Llama 3 70B InstructMeta | $0.548 | $0.51 | $0.74 | 8.2K | +1% |
| Mixtral 8x7B Instruct v0.1Mistral AI | $0.533 | $0.488 | $0.758 | 32.8K | −2% 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 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 |