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OpenKey

Seed 1.6 Flash

ByteDance SeedReleased Dec 23, 2025

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...

Try in playground
Context window
262K tokens
Max output
33K tokens
Input
image, text, video
Output
text
Tokenizer
Other
Released
Dec 23, 2025
Reasoning
optional

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.075$0.0022$0.077
Output$0.300$0.0090$0.309

Supported parameters

  • frequency_penalty
  • include_reasoning
  • max_tokens
  • reasoning
  • response_format
  • stop
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model bytedance-seed/seed-1.6-flash.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "bytedance-seed/seed-1.6-flash",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="bytedance-seed/seed-1.6-flash",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_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);

Questions

How much does Seed 1.6 Flash cost via API?
Through OpenKey, Seed 1.6 Flash costs $0.077 per 1M input tokens and $0.309 per 1M output tokens. That is the provider price ($0.075 / $0.300) plus a flat 3% fee — nothing else.
What is Seed 1.6 Flash's context window?
Seed 1.6 Flash accepts up to 262K tokens of context and returns up to 33K tokens per request.
Is Seed 1.6 Flash OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "bytedance-seed/seed-1.6-flash" using any OpenAI SDK — only the base URL and API key change.
What inputs does Seed 1.6 Flash support?
Seed 1.6 Flash accepts image, text, video input and produces text output.

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