Does Seed 1.6 support zero data retention?

Not by default. See the per-route data-handling section for each route's logging stance and retention window.

Where is Seed 1.6 hosted?

Seed 1.6 is available on multi-region hosting through the Opper gateway. See the per-route table for details.

Is Seed 1.6 trained on prompts and outputs?

No. Every hosting route for Seed 1.6 is configured so customer prompts and outputs are not used to train models by default.

Is a GDPR DPA available for Seed 1.6?

Yes. A GDPR Data Processing Agreement is available on at least one route serving Seed 1.6. Contact hello@opper.ai to receive it.

Seed 1.6

by ByteDance

Seed 1.6 is the flagship general-purpose model from ByteDance's Seed team, launched in June 2025 as part of the Doubao Seed line. It uses a sparse mixture-of-experts design with 230 billion total parameters, activating roughly 23 billion per forward pass, and pairs a 256K context window with text, image, and video understanding. Its signature feature is adaptive thinking, an approach that decides how much reasoning to spend based on how hard the prompt is, so simple queries stay fast while complex ones get deeper chains of thought. With tool calling and structured output on top, it suits agent backends, long-document analysis, and multimodal reasoning tasks that mix screenshots or video frames with text.

Open in playground Try in chat Compare

Key info

Input

Output

Features

Context window

262K

Max output

33K

Input price

$0.25 /1M

Output price

$2.00 /1M

No training by default
GDPR DPA available

Available routes

Seed 1.6 runs on 1 route through the Opper gateway. Compare residency, ZDR, and training posture at a glance — full data-handling detail per route below.

Provider	Region	Zero data retention	Training	Input	Output
BytePlus	Multi	Not by default	No	$0.25	$2.00

Data handling per route

Each route hosting Seed 1.6 has its own privacy posture, residency, and GDPR terms. Postures are maintained by Opper with a last-verification timestamp.

BytePlus — Multi-region

Zero data retention is not on by default — abuse monitoring, 180-day retention. No training on customer data. GLOBAL; SCCs; DPA available.

Zero data retention: Not by default — abuse monitoring, 180-day retention. Derived from the logging and moderation facts.
Training: No training on customer data.
Logging: Abuse monitoring (180-day retention)
Moderation: Not established
Caching: Not established
Subprocessor access: Not established
GDPR DPA: DPA available
Transfer mechanism: SCCs

Get started

Call Seed 1.6 through the Opper gateway with one API key. Let your coding agent set it up, or call it directly — Opper is drop-in compatible with the OpenAI, Anthropic, and Google AI SDKs.

Set it up with your agent

Copy this and paste it into a coding agent like Claude Code, Cursor or Codex and it'll wire up Opper for you.

Or call it directly

1import OpenAI from "openai";
2
3const client = new OpenAI({
4  apiKey: process.env.OPPER_API_KEY,
5  baseURL: "https://api.opper.ai/v3/compat",
6});
7
8const completion = await client.chat.completions.create({
9  model: "bytedance:ap/seed-1.6",
10  messages: [{ role: "user", content: "Hello" }],
11});
12console.log(completion.choices[0].message.content);