> ByteDance has 5 models on The Model Index, from Doubao Pro (May 2024) to Seed 2.1 (12 Aug 2026). All are closed models.

[Models](https://themodelindex.org/models/) /[Labs](https://themodelindex.org/labs/) /

ByteDance

Lab · 5 models · since May 2024

# ByteDance

ByteDance has 5 models on The Model Index, from Doubao Pro (May 2024) to Seed 2.1 (12 Aug 2026). All are closed models.

5

models tracked

0 open · 5 closed

–

no model scored yet

12 Aug 2026

latest release

Seed 2.1

2

current versions

3 replaced by newer ones

## Every model · newest first

| | MODEL | RELEASED | WEIGHTS | INDEX SCORE | INPUT $/M | OUTPUT $/M | CONTEXT |
| --- | --- | --- | --- | --- | --- | --- | --- |
| | [Seed 2.1](https://themodelindex.org/models/seed-2-1/) | 12 Aug 2026 | CLOSED | not scored yet | – | – | – |
| | [Seed 2.0 replaced](https://themodelindex.org/models/seed-2-0/) | 14 Feb 2026 | CLOSED | not scored yet | – | – | – |
| | [Seed 1.6 replaced](https://themodelindex.org/models/seed-1-6/) | 11 Jun 2025 | CLOSED | not scored yet | $0.25 | $2.0 | 262K |
| | [Doubao 1.5 Pro](https://themodelindex.org/models/doubao-1-5-pro/) | 22 Jan 2025 | CLOSED | not scored yet | – | – | – |
| | [Doubao Pro replaced](https://themodelindex.org/models/doubao-pro/) | 15 May 2024 | CLOSED | not scored yet | – | – | – |

Index score is fitted from independent evaluations and scaled so GPT-4 = 100; a striped bar is an estimate for a model not yet independently tested. Prices are list prices per million tokens.

## Release history · 5 announcements

[The Race →](https://themodelindex.org/race/)

| DATE | RELEASE | KIND | SOURCE |
| --- | --- | --- | --- |
| 12 Aug 2026 | Seed 2.1 | Flagship | no link |
| 14 Feb 2026 | Seed 2.0 | Flagship | [seed.bytedance.com ↗](https://seed.bytedance.com/en/blog/seed2-0-%E6%AD%A3%E5%BC%8F%E5%8F%91%E5%B8%83) |
| 11 Jun 2025 | Seed 1.6 | Reasoning | no link |
| 22 Jan 2025 | Doubao 1.5 Pro | Flagship | no link |
| 15 May 2024 | Doubao Pro | Flagship | no link |

Dates come from each lab's own announcement, linked where one exists.

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Source: https://themodelindex.org/labs/bytedance/ · The Model Index · data as of 2026-10-01