Doubao Seed 2.1 Pro
Doubao Seed 2.1 Pro is an API-only (closed weights) language model from ByteDance, released June 23, 2026.
The Seed model family has always been committed to uncovering users' real needs and unlocking their creativity. Since the launch of Seed2.0, we have tracked ongoing user feedback and observed growing expectations for more reliable responses and consistent model delivery.
Check it against your own PC →
Lab
ByteDance
Released
June 23, 2026
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 2.1 Pro yet. New models are usually evaluated within days to weeks.
Links
More from ByteDance
Cola2 · Doubao Seed 2.1 Turbo · 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 · Doubao Seed 1.8