ByteDance Seed · Model
Seed 2.1 Turbo pricing, context window and specs
Seed 2.1 Turbo costs $0.50 per million input tokens and $2.50 per million output tokens, and reads up to 262,144 tokens per request. By blended price it is number 5 of ByteDance Seed’s 6 current models here, counting from the cheapest.
- Input / 1M
- $0.50
- Output / 1M
- $2.50
- Cached / 1M
- –
- Context
- 262,144
- Max output
- Not published
- Released
- 2026-08-12
Estimate your cost with Seed 2.1 TurboCompare all ByteDance Seed modelsCount tokens for Seed 2.1 Turbo
Pricing
Seed 2.1 Turbo API pricing
| Price per 1M tokens | Input | Output |
|---|---|---|
| Standard | $0.50 | $2.50 |
Output costs 5.0× the input price, so long replies drive the bill more than long prompts. No cached-input price is published, so repeated prompt prefixes are billed at the full input price.
Examples
What Seed 2.1 Turbo costs in practice
| Workload | Tokens in / out | Requests/day | Per request | Per month |
|---|---|---|---|---|
| Support chatbot | 1,500 / 400 | 1,000 | $0.00175 | $53.23 |
| RAG app | 6,000 / 500 | 500 | $0.00425 | $64.64 |
| Coding agent | 40,000 / 2,000 | 200 | $0.025 | $152.08 |
| Document summariser | 8,000 / 600 | 300 | $0.0055 | $50.19 |
Change any number in the cost calculator.
Context
Context window
Seed 2.1 Turbo accepts up to 262,144 tokens per request, roughly 196,608 English words or 393 pages. That budget is shared between your prompt and the reply, and no separate cap on the reply is published.
Filling the whole window with one prompt costs about $0.13 at list price, so for repeated long-document work, retrieval (sending only the relevant parts) or prompt caching is usually much cheaper.
Features
Capabilities
- Image input
- Yes
- Tool / function calling
- Yes
- Reasoning mode
- Yes
- Prompt caching
- No
- Structured output
- Yes
- Open weights
- No
- Accepts
- text, image, video
- Knowledge cutoff
- Not published
As declared by the provider’s API. It shows a feature exists, not how well it works.
API
Seed 2.1 Turbo model ID
- OpenRouter
bytedance-seed/seed-2-1-turbo
Use the OpenRouter ID when calling it through OpenRouter; ByteDance Seed’s own API may name it differently. See the model ID reference for the providers we document.
ByteDance Seed
Where Seed 2.1 Turbo sits in ByteDance Seed’s line-up
Ranked by blended price (three parts input to one part output, $1 per 1M for Seed 2.1 Turbo), it is number 5 of ByteDance Seed’s 6 current models here, counting from the cheapest. One step down, Seed-2.0-Lite costs $0.6875 blended (31% less). One step up, Seed-2.0-Code costs $1.125 (1.1× as much). See every ByteDance Seed model and price
| Model | Input / 1M | Output / 1M | Context | Released |
|---|---|---|---|---|
| Seed 1.6 Flash | $0.075 | $0.30 | 262,144 | 2025-12-23 |
| Seed-2.0-Mini | $0.10 | $0.40 | 262,144 | 2026-02-26 |
| Seed 1.6 | $0.25 | $2 | 262,144 | 2025-12-23 |
| Seed-2.0-Lite | $0.25 | $2 | 262,144 | 2026-03-10 |
| Seed 2.1 Turbo (this page) | $0.50 | $2.50 | 262,144 | 2026-08-12 |
| Seed-2.0-Code | $0.50 | $3 | 262,144 | 2026-08-12 |
ByteDance Seed’s current models with a page here, cheapest first. Older and superseded models are listed on the provider page and in the comparison table.
Save
Cheaper alternatives
- Gemma 4 26B A4BGoogle89% cheaper
- Qwen3.5-9BQwen89% cheaper
- Seed 1.6 FlashByteDance Seed87% cheaper
- GPT-6 LunaOpenAI80% cheaper
- Claude Haiku 5.5Anthropic80% cheaper
Current models from major providers, one per provider, that keep image input, tool calling, a reasoning mode, a usable context window and output limit. Compared by blended price.
Compare
Similarly priced models
- Mistral Large 4Mistral$0.68 / $2.09
- Qwen3.6 27BQwen$0.32 / $3.20
- Nemotron 3 UltraNVIDIA$0.60 / $2.40
- Gemini 3.5 Flash LiteGoogle$0.30 / $2.50
- Nova 2 LiteAmazon$0.30 / $2.50
Current models from other major providers, closest blended price.
FAQ
Seed 2.1 Turbo questions
How much does Seed 2.1 Turbo cost?
Seed 2.1 Turbo costs $0.50 per million input tokens and $2.50 per million output tokens. A typical chatbot reply (1,500 tokens in, 400 out) costs about $0.00175. Use the LLM cost calculator for your own workload.
What is Seed 2.1 Turbo’s context window?
262,144 tokens, about 196,608 English words or 393 printed pages, shared between your prompt and the reply. No separate limit on the reply is published, so the window is the limit.
Does Seed 2.1 Turbo support prompt caching and batch requests?
No cached-input price is published for it. No batch price is published for it.
What are cheaper alternatives to Seed 2.1 Turbo?
With the same essentials (image input and tool calling), the cheapest options are Gemma 4 26B A4B (89% cheaper), Qwen3.5-9B (89% cheaper), Seed 1.6 Flash (87% cheaper). Cheaper doesn’t mean equivalent, so test them on your own prompts.
What is the API model ID for Seed 2.1 Turbo?
On OpenRouter it is bytedance-seed/seed-2-1-turbo. ByteDance Seed’s own API may use a different name, so check its model list before you deploy. Pass the ID as the model value in each request.
Is Seed 2.1 Turbo open source?
No, Seed 2.1 Turbo is only available through ByteDance Seed’s API and partners; its weights aren’t published.