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OpenKey

Seed 1.6

ByteDance SeedReleased Dec 23, 2025

Seed 1.6 is a general-purpose model released by the ByteDance Seed team. It incorporates multimodal capabilities and adaptive deep thinking with a 256K context window.

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$0.250$0.0075$0.258
Output$2.00$0.060$2.06

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.

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",
    "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",
    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",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does Seed 1.6 cost via API?
Through OpenKey, Seed 1.6 costs $0.258 per 1M input tokens and $2.06 per 1M output tokens. That is the provider price ($0.250 / $2.00) plus a flat 3% fee — nothing else.
What is Seed 1.6's context window?
Seed 1.6 accepts up to 262K tokens of context and returns up to 33K tokens per request.
Is Seed 1.6 OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "bytedance-seed/seed-1.6" using any OpenAI SDK — only the base URL and API key change.
What inputs does Seed 1.6 support?
Seed 1.6 accepts image, text, video input and produces text output.

More from ByteDance Seed

All ByteDance Seed models →