Seed Evolving
Summary
Seed Evolving is a proprietary language model from ByteDance Seed, released on 23 Jun 2026. It accepts text, images and video and generates text, with a 256K-token context window and up to 256K output tokens per response.
Rolling ByteDance Seed model for rapidly updated reasoning, coding, and agent capabilities
Last verified 4 Oct 2026. Every figure on this page links to its source.
Specifications
| Developer | ByteDance Seed |
|---|---|
| Release date | 23 Jun 2026 [models.dev] |
| Status | Generally available [models.dev] |
| Weights | Proprietary (API only) [models.dev] |
| Context window | 256K (256,000 tokens) [models.dev] |
| Max output | 256K 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 Evolving API pricing by provider
USD per million tokens. Sorted by input price.
We do not currently track a paid API listing for this model.
Frequently asked questions
What is the context window of Seed Evolving?
Seed Evolving has a context window of 256,000 tokens (256K) and can generate up to 256,000 tokens in a single response, according to models.dev.
Is Seed Evolving open source?
No. Seed Evolving is a proprietary model; ByteDance Seed has not released its weights.
When was Seed Evolving released?
ByteDance Seed released Seed Evolving on 23 Jun 2026, according to models.dev.
Change history
No changes detected since we started tracking this model. We re-check every source daily.