Seed 1.6 Flash
VerifiedFast multimodal model for text, image, and video inputs.
About Seed 1.6 Flash
The model uses a multimodal architecture that ingests and reasons over combined image, text, and video data. Its 262144-token context supports extended sequences such as long documents with visuals or multi-minute video clips paired with transcripts.
ByteDance-seed designed it as a non-open-weight system for efficient inference on complex inputs. Typical applications include automated video analysis, image-grounded question answering, and cross-modal content generation where large context is required.
Capabilities
How Seed 1.6 Flash compares
Seed 1.6 Flash (striped bar) vs other multimodal on intelligence, speed and price.
Price
USD per 1M output tokens · Lower is better · Seed 1.6 Flash ranks #8 of 100
Sources: Artificial Analysis (intelligence, speed) · OpenRouter (price).
Best for
Long multimodal document review
The 262144-token context allows Seed 1.6 Flash to ingest and reason over hundreds of pages of mixed text and images in a single pass.
Rapid video-frame analysis
Its multimodal design combined with Flash-level speed supports quick extraction of insights from extended video sequences accompanied by transcripts.
Extended multimodal chat sessions
Users can maintain coherent conversations that include images, charts, and prior messages across very large histories without truncation.
Strengths & limitations
Strengths
- +Very large 262k token context window
- +Native handling of image, text, and video
- +Fast inference as a Flash variant
- +Cross-modal reasoning across inputs
Limitations
- –Speed optimizations may reduce depth on complex tasks
- –Performance depends on Bytedance infrastructure
- –Video context length still bounded by token limit
Cost calculator
Estimate what Seed 1.6 Flash would cost for your usage.
Based on Seed 1.6 Flash's $0.07/1M input · $0.30/1M output. Estimate only — actual cost varies by provider and caching.
Quick start
OpenRouter's API is OpenAI-compatible — most SDKs work by just swapping the base URL. Only the model slug changes between models.
import OpenAI from "openai";
const client = new OpenAI({
baseURL: "https://openrouter.ai/api/v1",
apiKey: process.env.OPENROUTER_API_KEY,
});
const completion = await client.chat.completions.create({
model: "bytedance-seed/seed-1.6-flash",
messages: [{ role: "user", content: "Hello!" }],
});
console.log(completion.choices[0].message.content);Model slug: bytedance-seed/seed-1.6-flash
Editor's verdict
Seed 1.6 Flash is Bytedance-seed's proprietary multimodal with a 262K-token context window.
At $0.30 per 1M output tokens, it is very cost-efficient for its class.
It is available through Bytedance-seed's API and aggregators like OpenRouter.
Best suited to very large 262k token context window and native handling of image, text, and video.
Frequently asked questions
The model supports a context window of 262144 tokens.
User reviews
Real, verified reviews from the community shape this model's rating.
Loading reviews…
Other Seed models
Sibling versions in the Seed family from Bytedance-seed.
Similar models
Other multimodal worth comparing.