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ByteDance Seed: Seed 1.6 Flash

bytedance-seed/seed-1.6-flash

Released Dec 23, 2025262,144 context$0.075/M input tokens$0.30/M output tokens

Seed 1.6 Flash is an ultra-fast multimodal deep thinking model by ByteDance Seed, supporting both text and visual understanding. It features a 256k context window and can generate outputs of up to 16k tokens.

Recent activity on Seed 1.6 Flash

Total usage per day on OpenRouter

Prompt
147M
Reasoning
22.6M
Completion
8.33M

Prompt tokens measure input size. Reasoning tokens show internal thinking before a response. Completion tokens reflect total output length.