Seed 1.6 Flash
by ByteDance SeedChat
Low-latency ByteDance Seed model for high-throughput chat, extraction, and lightweight tool use
- Context
- 256K tokens
- Max output
- 32,000 tokens
- Released
- 2025-08-28
- Weights
- Closed
bytedance-seed/seed-1-6-flash · also seen as doubao-seed-1-6-flash-250828, doubao-seed-1.6-flash, volcengine/doubao-seed-1-6-flash, bytedance-seed/seed-1.6-flash-20250625
Specifications
Full facts as recorded, incl. what is unknown.
- Released
- 2025-08-28
- Weights
- Closed
- Input
- Text, Image
- Output
- Text
- Context window
- 256,000 max across endpoints
- Max output
- 32,000
- Providers
- 3 + 4 gateways, not counted as providers
- Epoch Capabilities Index
- not evaluated
- Direct price range
- $0.0223–$0.103 in · $0.223–$0.413 out per 1M tokens · across all 3 providers
More details
- Last updated
- 2025-12-23
- 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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Price history
Atom feedNo change since 19 Oct 2026. The cheapest direct price has been $0.0223 in / $0.223 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
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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 1.6 Flash |
|---|---|---|---|---|---|
| Sarvam-105BSarvam AI | $0.06 | $0.04 | $0.16 | 131K | −3% cheaper |
| Mercury 2.5 PreviewInception | $0.0583 | $0.04 | $0.15 | 260K | −5% cheaper |
| Phi-4Microsoft | $0.0653 | $0.056 | $0.112 | 16.4K | +6% |
| Hy-MT2-1.8BTencent | $0.0662 | $0.044 | $0.177 | 8.2K | +7% |
| Tencent Hy-MT2-LiteTencent | $0.0662 | $0.044 | $0.177 | 8K | +7% |
| Qwen 3.5 9B (Q4_K_M)Alibaba (Qwen) | $0.0667 | $0.05 | $0.15 | 262K | +8% |
| DiffusionGemmaGoogle | $0.0667 | $0.05 | $0.15 | 262K | +8% |
| Nemotron 3.5 Content SafetyNVIDIA | $0.0667 | $0.05 | $0.15 | 128K | +8% |
More from ByteDance Seed
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|---|---|---|---|
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| Seed Character | 2026-06-23 | 256K | from $0.119 |
| Seed 2.1 Pro | 2026-06-23 | 256K | from $0.891 |