Bytedance Seed: Seed 1.6

ByteDance Seed model for long-context reasoning, instruction following, and tool-assisted tasks

Model lab: Bytedance Seed
Model family: seed

Modalitiestext → text

Context window256,000

Maximum output64,000

InputUSD 0.096 / 1M tokens

OutputUSD 0.232 / 1M tokens

Try now View docs

Quickstart

Use your Moduck API Key, set the API base URL to https://api.moduck.ai/v1, and set the model parameter to moduck/bytedance/seed-1-6.

import os
import requests

base_url = "https://api.moduck.ai/v1"
api_key = os.environ["MODUCK_API_KEY"]
model_id = "moduck/bytedance/seed-1-6"

response = requests.post(
    f"{base_url}/chat/completions",
    headers={
        "Authorization": f"Bearer {api_key}",
        "Content-Type": "application/json",
    },
    json={
        "model": model_id,
        "messages": [{"role": "user", "content": "Hello!"}],
        "stream": False,
    },
    timeout=60,
)
response.raise_for_status()
print(response.json())

Use the familiar OpenAI-style chat request format to make model integration easier.

Seed 1.6 API Pricing

Type	Price information
Input	USD 0.096 / 1M tokens
Output	USD 0.232 / 1M tokens
Cached input	USD 0.0184 / 1M tokens

Performance

Measured on the Moduck gateway across live traffic, hour by hour over the last 24 hours. Time to first token is how long before anything appears; throughput is how fast the answer is written after that; end-to-end latency is the whole round trip. Figures are medians unless the card says otherwise.

Performance trends

Throughput91.9 tok/sCurrent

Time to first token3.3 sCurrent

End-to-end latency7.7 sCurrent

Throughput

Current91.9 tok/s

Window average89.7 tok/s

Time to first token

Current3.3 s

Window average1.5 s

End-to-end latency

Current7.7 s

Window average7.5 s

Tail latency (P99)

Current14.7 s

Window average16.8 s

Prompt cache hit rate

Current26.4%

Window average23.4%

Error rate

Current0.7%

Window average0.1%

Availability

Uptime is the share of time at least one provider serving this model responded. Availability is stricter: the share of requests actually served. A provider that answers but fails part of the traffic lowers availability without lowering uptime. Both cover the last three days.

Uptime100%At least one provider responded

Availability100%Requests actually served

Error rate0%Share of failed requests

Served requests, hour by hour

24 hours agoNow

Seed 1.6 Compare models

Model	Input price	Output price	Context window	Capabilities
Seed 1.6This page	USD 0.096 / 1M tokens	USD 0.232 / 1M tokens	256,000	Text output · Reasoning · Tool calling
Seed 2.1 Pro	USD 0.56576 / 1M tokens	USD 2.8288 / 1M tokens	256,000	Text output · Reasoning · Tool calling
Seed 2.1 Turbo	USD 0.28288 / 1M tokens	USD 1.41568 / 1M tokens	256,000	Text output · Reasoning · Tool calling
Seed Character	USD 0.095 / 1M tokens · Base context tier (boundary 32000 tokens)	USD 0.237496 / 1M tokens · Base context tier (boundary 32000 tokens)	256,000	Text output · Reasoning · Tool calling
Seed Evolving	USD 0.7072 / 1M tokens	USD 3.536 / 1M tokens	256,000	Text output · Reasoning · Tool calling

Model specifications

Input: text
Output: text
Context window: 256,000
Maximum output: 64,000
Release date: 2025-10-15
Attachments: No
Reasoning: Yes
Tool calling: Yes
Structured output: Yes
Temperature setting: Yes
Open weights: No

Frequently asked questions

What is Seed 1.6 for?

ByteDance Seed model for long-context reasoning, instruction following, and tool-assisted tasks

What inputs and outputs does Seed 1.6 support?

Recorded inputs: text; outputs: text.

How is Seed 1.6 priced?

The pricing table shows the current recorded Moduck price. For example: Input USD 0.096 / 1M tokens; Output USD 0.232 / 1M tokens. See the pricing table for all units, variants, and conditions.

What specifications are recorded for Seed 1.6?

Current model records list Context window 256,000 tokens; Maximum output 64,000 tokens.

What model parameter does the Quickstart use?

The example uses moduck/bytedance/seed-1-6. This is a cataloged Moduck public or reserved ID; check your account’s available models before calling it.

Can I call this model through the Moduck API now?

This page has no verified Moduck API call for this model. A Quickstart example or reserved ID does not establish access; check the models available to your account.