ByteDance: Seed 2.1 Turbo
Seed 2.1 Turbo is a reasoning model from ByteDance released on Jun 23, 2026. It reads text and images and writes text, with a 262K token context window and up to 262K tokens per reply.
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It costs $0.50 per million input tokens and $2.50 per million output tokens. Cached input bills at $0.10, 80% less than fresh input.
It supports tool calling and prompt caching.
- Modalities
- In / out price
- $0.50 / $2.50 per 1M
- Context
- 262K
- Max output
- 262K
- Released
- Jun 23, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Seed 2.1 Turbo pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $0.50 / 1M tokens | |
|---|---|---|
| Output | $2.50 / 1M tokens | |
| Cached input (read) | $0.10 / 1M tokens | 80% off input |
What Seed 2.1 Turbo costs per month
Pick a workload close to yours or type your own volumes.
Supported request parameters
What you can set when you call Seed 2.1 Turbo through an OpenAI compatible API.
- Tools
tools - Reasoning
reasoning
Alternatives to Seed 2.1 Turbo
Models that take the same inputs and call tools, closest in price, cheaper ones first.
- Index 22.2
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 24 providers.
by googleJul 9, 20261.05M context$0.30/M input tokens$2.50/M output tokens24 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 32 providers.
by googleMar 20, 2025$0.30/M input tokens$2.50/M output tokens32 providers
- Index 25.2
Reads text, images and video. Tool calling, structured output, reasoning. Served by 24 providers.
by qwenJun 2, 20261M context$0.40/M input tokens$1.60/M output tokens24 providers
- 256K context
Reads text, images and video. Tool calling, structured output, reasoning. Served by 6 providers.
by bytedance-seedJun 23, 2026$0.50/M input tokens$2.50/M output tokens6 providers
- 262K context
Reads text and images. Tool calling, structured output, reasoning.
by nex-agiJun 2, 2026$0.50/M input tokens$2.50/M output tokens
- 328K context
Reads text and images. Tool calling, structured output, reasoning. Served by 2 providers.
by deepreinforceAug 18, 2026$0.30/M input tokens$3/M output tokens2 providers
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Seedance 2.0 Mini
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Seed 2.1 Turbo questions
How much does the Seed 2.1 Turbo API cost?
$0.50 per million input tokens and $2.50 per million output tokens, with cached input at $0.10. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Seed 2.1 Turbo?
262,144 tokens of input, and it can write up to 262,144 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Does Seed 2.1 Turbo support tool calling?
Yes. It accepts tool definitions, which is what an agent needs to call your APIs.
Is Seed 2.1 Turbo open source?
No. ByteDance serves it through an API only, so you cannot download the weights or host it yourself.
When was Seed 2.1 Turbo released?
Jun 23, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.
Building on Seed 2.1 Turbo?
I test your real tasks on it and the two closest alternatives, then ship the agent on whichever wins on cost and accuracy.
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