BytedanceReleased on Jun 24, 2026

Seed 2.1 Pro: Benchmarks, Pricing & Context Window

Seed 2.1 Pro is a language model from Bytedance, released in June 2026, with multimodal input.

ByteDance's flagship next-generation agent model built for real-world productivity. A deep-thinking model with strong demand understanding, long-horizon planning, and continuous self-repair, it delivers reliable end-to-end results across

Seed 2.1 Pro API

API access coming soon

Seed 2.1 Pro will be available through our gateway shortly.

Seed 2.1 Pro examples

Recent arena outputs from Seed 2.1 Pro, picked from the highest-ranked matchups.

Seed 2.1 Pro license

Seed 2.1 Pro is released under the Proprietary license, which restricts commercial use.

License
Proprietary
Non-commercial

Proprietary license - usage restrictions apply

FAQ

Common questions about Seed 2.1 Pro.

When was Seed 2.1 Pro released?

Seed 2.1 Pro was released on June 24, 2026 by Bytedance. This is the official Seed 2.1 Pro release date tracked on LLM Stats.

Is Seed 2.1 Pro available via API?

Yes, Seed 2.1 Pro is available via API. See the official documentation for authentication and endpoint details.

Who created Seed 2.1 Pro?

Seed 2.1 Pro was created by Bytedance.

What is the license for Seed 2.1 Pro?

Seed 2.1 Pro is released under the Proprietary license.

Is Seed 2.1 Pro multimodal?

Yes, Seed 2.1 Pro is multimodal and can accept both text and images as input.

Where is the Seed 2.1 Pro paper or technical report?

Seed 2.1 Pro has a paper or technical report available at https://seed.bytedance.com/en/blog/seed2-1-officially-released-advancing-ai-productivity. Use that source for architecture, training, release and evaluation details.