Doubao Seed 2.1 Turbo API — pricing & specs

Doubao Seed 2.1 Turbo is a ByteDance text and image model with a separate price from Seed 2.1 Pro. On KeepRouter, Doubao Seed 2.1 Turbo costs $0.4500 per 1M input tokens and $2.24 per 1M output tokens, billed pay-as-you-go with no monthly fee. Call it through a compatible KeepRouter endpoint supported by its active route, with the model id doubao-2.1-turbo.

MakerByteDance
ModalityText, vision
Input price$0.4500 per 1M tokens
Output price$2.24 per 1M tokens
Cached input$0.0895 per 1M tokens
CapabilitiesVision (image input), Chat completions, Streaming where supported, Tool calling where supported
EndpointPOST /v1/chat/completions
Model iddoubao-2.1-turbo

How pricing works for Doubao Seed 2.1 Turbo

Doubao Seed 2.1 Turbo is billed per token — $0.4500 per 1M input tokens and $2.24 per 1M output tokens, with cached input at $0.0895 per 1M tokens. The published price is pay-as-you-go, with no monthly fee; actual request cost depends on measured token usage.

Calling Doubao Seed 2.1 Turbo on KeepRouter

Point a compatible client at the supported KeepRouter endpoint and set the model to doubao-2.1-turbo. KeepRouter preserves the client-facing request shape while handling upstream routing or translation. Use POST /v1/chat/completions or, on compatible chat routes, POST /v1/messages; streaming and tool support depend on the model's active route.

cURL

curl https://keeprouter.com/v1/chat/completions \
  -H "Authorization: Bearer $KEEPROUTER_KEY" -H "Content-Type: application/json" \
  -d '{"model":"doubao-2.1-turbo","messages":[{"role":"user","content":"Hello"}]}'

Python

import os
from openai import OpenAI
client = OpenAI(base_url="https://keeprouter.com/v1", api_key=os.environ["KEEPROUTER_KEY"])
r = client.chat.completions.create(model="doubao-2.1-turbo", messages=[{"role":"user","content":"Hello"}])

JavaScript

import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://keeprouter.com/v1", apiKey: process.env.KEEPROUTER_KEY });
const r = await client.chat.completions.create({ model: "doubao-2.1-turbo", messages: [{ role: "user", content: "Hello" }] });

Estimate API costs

At the current KeepRouter customer price, an example workload of 1,000 total input tokens, no cached input, and 500 output tokens per request costs approximately $0.001570 per request. At 100 requests per day, that is $4.71 over 30 days. This is a usage estimate, excluding processing fees, taxes, retries and application infrastructure. Actual usage, cache hits and supported generation durations need their own checks.

Adjust quantities in the API cost calculator.

Model identity and official sources

Sources checked 2026-10-03.

Bounded generation checked

On October 3, 2026, this exact ID returned HTTP 200, visible text and final token usage through /v1/chat/completions. These small checks do not establish task accuracy, full-context capacity, media compatibility or sustained throughput.

KeepRouter · API reference

Model and evaluation task

Doubao Seed 2.1 Turbo accepts text and images. Pro selects the 2026-09-15 snapshot; Turbo remains its own model. Evaluate Chinese extraction with required fields, missing-value handling and citations before switching production traffic.

ByteDance · model documentation

API contract and migration

Use Chat Completions with this exact public model ID. Maker-native tools, audio generation and media encodings are not automatically exposed by a compatibility route. Start with text, then test each required media and tool workflow separately.

ByteDance · model documentation

Customer price and verification scope

Use this page's live KeepRouter USD input, output and, when shown, cached-input prices. Cached tokens are part of prompt usage and must not be counted twice. Compare spend including reasoning and retries. Reviewed documentation and catalog presence do not certify full-context capacity, media handling or throughput.

KeepRouter · pricing and usage · KeepRouter · workload calculator

How to evaluate Doubao Seed 2.1 Turbo

Doubao Seed 2.1 Turbo is listed on KeepRouter as text, vision under the exact id doubao-2.1-turbo. Use /v1/chat/completions for the listed route; a maker's upstream features do not automatically apply to this gateway endpoint. No context limit is asserted here because the exact upstream limit has not been verified for this catalog entry.

First workload: Start with a text question plus one representative image, then repeat the same question with text only. Compare answer quality, latency and billed input/output tokens.

Before production: For agent use, test tool calls and structured output on this exact model route before production; an OpenAI-compatible chat endpoint alone does not prove either feature.

Agent setup paths

OpenCode

OpenCode documents a custom OpenAI-compatible provider. Set baseURL to https://keeprouter.com/v1 and list doubao-2.1-turbo as a model; validate tool behavior on the exact route. Official setup.

{
  "$schema": "https://opencode.ai/config.json",
  "provider": {
    "keeprouter": {
      "npm": "@ai-sdk/openai-compatible",
      "name": "KeepRouter",
      "options": {
        "baseURL": "https://keeprouter.com/v1",
        "apiKey": "{env:KEEPROUTER_API_KEY}"
      },
      "models": {
        "doubao-2.1-turbo": {
          "name": "Doubao Seed 2.1 Turbo"
        }
      }
    }
  }
}

Continue

Continue documents provider: openai with a custom apiBase. Set apiBase to https://keeprouter.com/v1 and model to doubao-2.1-turbo; validate the selected feature and endpoint. Official setup.

name: KeepRouter
version: 0.0.1
schema: v1
models:
  - name: Doubao Seed 2.1 Turbo
    provider: openai
    model: doubao-2.1-turbo
    apiBase: https://keeprouter.com/v1
    apiKey: <YOUR_KEEPROUTER_API_KEY>

These are documented configuration paths; model-specific tool, streaming and multimodal behavior still needs a real request test.

Public model usage evidence

No public, exact-variant usage figure has been verified for this KeepRouter model id. Missing data is not zero usage; family-level or maker-wide traffic is not presented as this model's traffic.

Published examples and cases

No exact-model customer case has been verified for this entry. The workload above is an evaluation recipe, not a claim of a public deployment.

Source and verification boundary

Official Doubao Seed 2.1 Turbo documentation. KeepRouter's live catalog is authoritative for the customer price and enabled endpoint shown here; the maker remains authoritative for upstream model capabilities and limits.

Pricing and implementation guides

Guides

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Catalog facts and prices last changed .

Page content reviewed .