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Doubao Seed 1.6 Flash

ByteDanceProprietaryPending Human Review

Seed1.6 Flash is ByteDance’s low-latency multimodal reasoning tier, served through Volcano Engine and BytePlus. It supports text and visual input, optional deep thinking, and a documented 256K context with up to 16K output tokens. The model targets responsive assistants and high-volume visual or language tasks while retaining reasoning capability. Its independently positioned Flash tier is represented separately from the larger Seed1.6 model; its parameter count and detailed architecture are not publicly established in the reviewed sources. June 2025 release-month precision follows the official API catalog, without treating the 250615 snapshot suffix as a launch date.

2025-06
Undisclosed multimodal language-model architecture
Proprietary

Specifications

Architecture
Undisclosed multimodal language-model architecture
License
Proprietary
Context Window
256,000 tokens
Max Output
16,000 tokens
Type
multimodal
Modalities
textimage

Benchmark Scores

Advanced Specifications

Model Family
Seed
API Access
Available
Chat Interface
Not Available
Variants
ByteDance-Seed-1.6-flashdoubao-seed-1-6-flash-250615doubao-seed-1-6-flash-250715

Capabilities & Limitations

Capabilities
low-latency language generationvisionreasoning
Known Limitations
Public weights are unavailableQuality and latency depend on prompt and thinking settingsSeparate providers may expose different serving limits
Notable Use Cases
responsive visual assistantshigh-volume document analysisinteractive customer support

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