# Seed 2.1 Turbo

> Seed 2.1 Turbo is a proprietary language model from ByteDance Seed, released on 12 Aug 2026. It accepts text, images and video and generates text, with a 262K-token context window and up to 236K output tokens per response. As of 4 Oct 2026, the lowest listed API price is $0.50 per million input tokens and $2.50 per million output tokens (OpenRouter), across 2 providers we track.

Source page: https://www.aimodel.directory/models/seed-2-1-turbo
Last verified: 4 Oct 2026

## Specifications

- **Developer:** ByteDance Seed
- **Release date:** 12 Aug 2026 (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Status:** Generally available (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Weights:** Proprietary (API only) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Context window:** 262K (262,144 tokens) (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Max output:** 236K tokens (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Input:** Text, images and video (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Output:** Text (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Reasoning mode:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Tool calling:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)
- **Structured output:** Yes (source: models.dev, https://github.com/sst/models.dev/blob/dev/providers/openrouter/models/bytedance-seed/seed-2-1-turbo.toml)

## API pricing (USD per 1M tokens)

| Provider | Input | Output | Cached input | Context |
|---|---|---|---|---|
| OpenRouter | $0.50 | $2.50 | – | 262K |
| Vercel AI Gateway | $0.50 | $2.50 | $0.10 | 262K |

## FAQ

### What is the context window of Seed 2.1 Turbo?

Seed 2.1 Turbo has a context window of 262,144 tokens (262K) and can generate up to 235,929 tokens in a single response, according to models.dev.

### How much does the Seed 2.1 Turbo API cost?

Seed 2.1 Turbo is listed from $0.50 per million input tokens and $2.50 per million output tokens (OpenRouter). Prices last verified 4 Oct 2026.

### Is Seed 2.1 Turbo open source?

No. Seed 2.1 Turbo is a proprietary model; ByteDance Seed has not released its weights. It is available through APIs including OpenRouter, Vercel AI Gateway.

### When was Seed 2.1 Turbo released?

ByteDance Seed released Seed 2.1 Turbo on 12 Aug 2026, according to models.dev.

### Which providers offer Seed 2.1 Turbo?

We track Seed 2.1 Turbo on 2 providers: OpenRouter, Vercel AI Gateway.

---
Data licensed CC BY 4.0. Cite as: AI Model Directory, "Seed 2.1 Turbo", https://www.aimodel.directory/models/seed-2-1-turbo