ByteDance Seed: Seed 2.1 Turbo

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bytedance-seed/seed-2-1-turbo

Seed 2.1 Turbo is a multimodal model from ByteDance Seed for coding and long-horizon agent workflows. It is suited for end-to-end software delivery, multi-step task execution, and understanding visual and...

At a glance

Context window: 262Ktokens
Max output: 236Ktokens
Knowledge to: —
Released: 2026

Capabilities

CapabilitiesReasoningVisionToolsStructured output

InputTextImageVideo

OutputText

ReasoningSupported

Performance

Reference uptime

100%

Aug 18Sep 16

Median latency

2,554 ms

Aug 18Sep 16

Throughput

37.4 tok/s

Aug 18Sep 16

IranRouter uptime comes from our own automated probes; the reference figures are daily measurements of this model's upstream routes. Each card shows a 30-day average, and a day without data stays empty.

Supported parameters

frequency_penaltyinclude_reasoningmax_tokensreasoningresponse_formatstopstructured_outputstemperaturetool_choicetoolstop_p

Parameters this model accepts; anything else is ignored.

Quick start

from openai import OpenAI

client = OpenAI(
    api_key="ir-...",
    base_url="https://iranrouter.com/v1",
)

resp = client.chat.completions.create(
    model="bytedance-seed/seed-2-1-turbo",
    messages=[{"role": "user", "content": "سلام!"}],
)
print(resp.choices[0].message.content)

Only base_url and the key change; the rest of your code stays as it is.