Seed 2.1 Turbo
Summary
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.
Multimodal reasoning model for visual analysis, planning, and tool use
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | ByteDance Seed |
|---|---|
| Release date | 12 Aug 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 262K (262,144 tokens) [models.dev] |
| Max output | 236K tokens [models.dev] |
| Input | Text, images and video [models.dev] |
| Output | Text [models.dev] |
| Reasoning mode | Yes [models.dev] |
| Tool calling | Yes [models.dev] |
| Structured output | Yes [models.dev] |
Seed 2.1 Turbo API pricing by provider
USD per million tokens. Sorted by input price.
| Provider | Input | Output | Cached input | Context | Source |
|---|---|---|---|---|---|
| OpenRouter bytedance-seed/seed-2-1-turbo | $0.50 | $2.50 | – | 262K | OpenRouter, 4 Oct 2026 |
| Vercel AI Gateway bytedance/seed-2.1-turbo | $0.50 | $2.50 | $0.10 | 262K | models.dev, 4 Oct 2026 |
Frequently asked questions
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.
Change history
No changes detected since we started tracking this model. We re-check every source daily.