Seed 2.0 Pro

ByteDance Seed 2.0 Pro is the flagship model in the Seed line, designed for complex multimodal reasoning and long-horizon agent workflows. It was released on 2026-02-14, alongside Seed 2.0 Mini. It has a context window of 256000 tokens and a maximum output of 128000 tokens. It accepts image, text, and video input, and returns text. It supports reasoning mode and tool calling. Weights are not open. Pricing starts at $0.475 per million input tokens and $2.37 per million output tokens, with cached input at $0.095 per million tokens.

First version of its line in the registry.

Range across the hosts that serve it: up to $0.782 per 1M input tokens.

• ·Complex multimodal reasoning with image, text, video
• ·Long-horizon agent workflows
• ·256k token context window
• ·128k token max output
• ·Tool calling and reasoning mode

• Reach for it for complex multimodal reasoning tasks
• Reach for it for long-horizon agent workflows
• Reach for it for tasks needing large context and output

2 hosts serve this model at the price above · the maker's documentation

The registry keeps the six most recent versions of a line. Older ones stay in the file and can be surfaced without a rebuild.

What is the context window size?

The context window is 256000 tokens.

Does it support video input?

Yes, it accepts image, text, and video input.

Are the weights open?

No, the weights are not open.