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Seed

ByteDance · flagship line

7 releases since 2024Latest: Doubao-Seed-2.1-Pro

The newest Seed model is Doubao-Seed-2.1-Pro, released on June 23, 2026. It has been 110 days since then, longer than the line's usual gap of 85 days.

Where the line stands

How long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

Seed

ByteDance · flagship line

Latest: Doubao-Seed-2.1-Pro · Jun 23, 2026

Past its usual gap110 days since the last release — usual gap is 85
Days since last release
110
days
Usual gap
85
days
Recent gaps
Doubao-Seed-2.1-Pro · Jun 2026
129
Doubao-Seed-2.0-Pro · Feb 2026
58
Doubao-Seed-1.8 · Dec 2025
190
Doubao-Seed-1.6 · Jun 2025
55

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Every Seed release

Newest first — what each version changed versus the one before, in ByteDance's own numbers.

Jun
23
2026
Doubao-Seed-2.1-ProByteDance · Seed
Feb
14
2026
Doubao-Seed-2.0-ProByteDance · Seed
Dec
18
2025
Doubao-Seed-1.8ByteDance · Seed
Jun
11
2025
Doubao-Seed-1.6ByteDance · Seed
Apr
17
2025
Doubao-1.5-thinking-proByteDance · Seed
Jan
22
2025
Doubao-1.5-proByteDance · Seed
May
15
2024
Doubao-proByteDance · Seed