Doubao Seed 1.8
Doubao Seed 1.8 is an API-only (closed weights) language model from ByteDance, released December 18, 2025.
Recent progress in large language models (LLMs) and vision–language models (VLMs) has enabled strong performance on foundational capabilities, including natural language understanding, reasoning, code generation, and multimodal perception.
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Lab
ByteDance
Released
December 18, 2025
Weights
API-only (closed weights)
Parameters
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Context
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Price / M tokens
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Epoch ECI
not yet rated
Benchmark results
Epoch AI has not published results for Doubao Seed 1.8 yet. New models are usually evaluated within days to weeks.
Links
More from ByteDance
Cola2 · Doubao Seed 2.1 Turbo · Doubao Seed 2.1 Pro · Doubao Seed Evolving (Nov 2026) · Doubao Seed 2.0 Lite (Apr 2026) · Doubao-Seed-2.0 Pro · Doubao Seed 2.0 Code · Doubao Seed 2.0 Mini