ByteDance: Doubao Seed 2.1 Pro
Doubao Seed 2.1 Pro is a language model from ByteDance released on Jun 23, 2026. It reads text and writes text, with a 256K token context window and up to 128K tokens per reply.
Show moreShow less
It costs $1 per million input tokens and $5 per million output tokens. Cached input bills at $0.50, 50% less than fresh input.
It supports prompt caching.
- Modalities
- In / out price
- $1 / $5 per 1M
- Context
- 256K
- Max output
- 128K
- Released
- Jun 23, 2026
- Knowledge cutoff
- n/a
- Tool calling
- Structured output
- Reasoning
- Prompt caching
- Open weights
- Free to use
Doubao Seed 2.1 Pro pricing
USD, as listed on Oct 15, 2026. Most bills are input heavy, so the cached input rate matters as much as the headline price.
| Input | $1 / 1M tokens | |
|---|---|---|
| Output | $5 / 1M tokens | |
| Cached input (read) | $0.50 / 1M tokens | 50% off input |
What Doubao Seed 2.1 Pro costs per month
Pick a workload close to yours or type your own volumes.
Alternatives to Doubao Seed 2.1 Pro
Models that take the same inputs, closest in price, cheaper ones first.
- Index 48.1
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 12 providers.
by metaSep 2, 20261.05M context$1.25/M input tokens$4.25/M output tokens12 providers
- 1.05M context
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 14 providers.
by metaAug 5, 2026$1.25/M input tokens$4.25/M output tokens14 providers
- 200K context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 36 providers.
by anthropicOct 1, 2025$1/M input tokens$5/M output tokens36 providers
- 1M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 29 providers.
by x-aiApr 17, 2026$1.25/M input tokens$2.50/M output tokens29 providers
- 1M context
Reads text, images and files. Tool calling, structured output, reasoning. Served by 10 providers.
by x-aiMar 9, 2026$1.25/M input tokens$2.50/M output tokens10 providers
- Index 40.9
Reads text, images, files, audio and video. Tool calling, structured output, reasoning. Served by 25 providers.
by googleSep 2, 20261.05M context$0.75/M input tokens$3.75/M output tokens25 providers
More from ByteDance
Seedance 2.5
VideoGenerates video from text.
by bytedanceAug 7, 2026
- 128K context
Reads text and images. Reasoning.
by bytedanceJul 18, 2026$0.1179/M input tokens$0.2947/M output tokens
Seedream 5.0 Pro
ImageGenerates images from text.
by bytedanceJul 11, 2026
- 256K context
Reads text.
by bytedanceJun 23, 2026$0.50/M input tokens$2.50/M output tokens
- 262K context
Reads text and images. Tool calling, reasoning.
by bytedanceJun 23, 2026$0.50/M input tokens$2.50/M output tokens
Seedance 2.0 Mini
VideoGenerates video from text and images.
by bytedanceJun 22, 2026
Doubao Seed 2.1 Pro questions
How much does the Doubao Seed 2.1 Pro API cost?
$1 per million input tokens and $5 per million output tokens, with cached input at $0.50. The estimator on this page turns that into a monthly bill for your own workload.
What is the context window of Doubao Seed 2.1 Pro?
256,000 tokens of input, and it can write up to 128,000 tokens in one reply. As a rough guide, a million tokens is around 750,000 English words.
Does Doubao Seed 2.1 Pro support tool calling?
Not through the standard tools parameter. For an agent that calls your APIs, pick a model from the alternatives below that does.
Is Doubao Seed 2.1 Pro open source?
No. ByteDance serves it through an API only, so you cannot download the weights or host it yourself.
When was Doubao Seed 2.1 Pro released?
Jun 23, 2026.
Catalog data from models.dev (MIT licensed), refreshed daily, last on Oct 15, 2026. The summary is written from these facts.