ByteDance Seed: Seed 1.6 Flash✓ Catalog verified
Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate outputs of up to 16k tokens.
Overview
Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate outputs of up to 16k tokens.
Access: available through the official Bytedance Seed API. Context window: 262K.
Specifications
| API identifier | bytedance-seed/seed-1.6-flash |
| Provider | Bytedance Seed |
| Model type | Multimodal LLM |
| Context window | 262K catalog |
| Input modalities | image · text · video |
| Output modalities | text |
| Released | Dec 23, 2025 |
| Moderated | No |
| Architecture modality | text+image+video->text |
API defaults
{
"top_p": null,
"temperature": null,
"frequency_penalty": null
}Pricing
Live pricing components for bytedance-seed/seed-1.6-flash as published in the catalog.
| Pricing component | Raw unit price | Normalized | Unit |
|---|---|---|---|
| Prompt tokens | $7.5e-8 | $0.07 / 1M | Per input token |
| Completion tokens | $3e-7 | $0.30 / 1M | Per output token |
| Request fee | N/A | N/A | Per request |
| Image fee | N/A | N/A | Per image unit |
| Web search fee | N/A | N/A | Per search request |
Cost calculator
Estimate monthly spend from your own token volumes.
Estimated Total Cost
$0.1Calculated from current list pricing in the ModelsAtlas catalog.Capabilities
| Capability | Status | What it means |
|---|---|---|
| Visual Understanding | ✓ Supported | Image and document analysis support |
| Audio Processing | Not advertised | Speech and voice aligned flows |
| Tool Calling | ✓ Supported | Supports tools / function calling |
| Self-Hosting | Not advertised | Deploy outside managed APIs |
Capability signals
Directional signals derived from model metadata and capability tags — not official benchmark submissions.
Quick start
Call ByteDance Seed: Seed 1.6 Flash through an OpenAI-compatible client.
from openai import OpenAI
client = OpenAI(
base_url="https://openrouter.ai/api/v1",
api_key="YOUR_API_KEY"
)
response = client.chat.completions.create(
model="bytedance-seed/seed-1.6-flash",
messages=[{"role": "user", "content": "Explain quantum physics."}]
)
print(response.choices[0].message.content)Alternatives
Closest models by context window from a different provider.
| Model | Provider | Context | Input /1M | Actions |
|---|---|---|---|---|
| MoonshotAI: Kimi K2.5 | Moonshotai | 262K | $0.42 | View → |
| Qwen: Qwen3 30B A3B Instruct 2507 | Qwen | 262K | $0.09 | View → |
Sources & attribution
Pricing and metadata are maintained in the ModelsAtlas catalog.
Frequently asked questions
How much does ByteDance Seed: Seed 1.6 Flash cost?
$0.07 per 1M input tokens and $0.30 per 1M output tokens on the official Bytedance Seed API.
What is the context window of ByteDance Seed: Seed 1.6 Flash?
ByteDance Seed: Seed 1.6 Flash supports up to 262K tokens of context.
Does ByteDance Seed: Seed 1.6 Flash support tool / function calling?
Yes, ByteDance Seed: Seed 1.6 Flash supports tool / function calling — you can register tools and the model will emit structured tool calls.
How do I access ByteDance Seed: Seed 1.6 Flash?
Use the official Bytedance Seed API with the model id `bytedance-seed/seed-1.6-flash`. See the Quick start section above for code examples.