One agent session
1M input tokens and 100K output tokens, no caching.
- Input1M x $0.50 = $0.50
- Output0.1M x $3 = $0.30
$0.80per session
ByteDance Seed - Closed weights
Seed 2.0 Pro pricing and specs
Seed 2.0 Pro is a closed-weights model from ByteDance Seed that costs $0.50 per 1M input tokens and $3 per 1M output tokens on the first-party API, with a 256K-token context window.
Last verified from docs.byteplus.com. All sources
- Input / 1M
- $0.50
- Output / 1M
- $3
- Context
- 256K tokens
- Weights
- Closed
Pricing per 1M tokens
| Item | Price / 1M tokens |
|---|---|
| InputPrompts up to 128,000 tokens | $0.50 |
| OutputPrompts up to 128,000 tokens | $3 |
| Cache readPrompts up to 128,000 tokens | $0.10 |
| Batch inputBatch requests, prompts up to 128,000 tokens | $0.25 |
| Batch outputBatch requests, prompts up to 128,000 tokens | $1.50 |
| Long-context inputPrompts over 128,000 tokens | $1 |
| Long-context outputPrompts over 128,000 tokens | $6 |
| Long-context cache readPrompts over 128,000 tokens | $0.20 |
| Long-context batch inputBatch requests, prompts over 128,000 tokens | $0.50 |
| Long-context batch outputBatch requests, prompts over 128,000 tokens | $3 |
Note: BytePlus ModelArk online inference (standard), tiered by prompt length: [0, 128K] at base pricing, (128K, 256K] at long-context pricing. ModelArk bills cache storage at 0.0083 USD per M tokens per hour instead of a cache write fee, so cache write is not stated. Batch inference: 0.25 input / 0.10 cache-hit / 1.50 output up to 128K, 0.50 / 0.20 / 3.00 above. No audio input price is listed. The model list states context length 256K and max output 128K including chain of thought (default 4K); it gives max input as 224K in one table and 256K in another. BytePlus writes K as 1,000. The pricing page's worked example (a 200K-token prompt billed at 0.25 input / 2 output) contradicts its own table; the table rates are recorded. The release date is left blank because the release notes list it only under month 202602, with no day. No Seed 2.0 id appears in the Vercel AI Gateway model list.
Specs
- Context window
- 256,000 tokens
- Max output
- 128,000 tokens
- Provider
- ByteDance Seed
- API model id
seed-2-0-pro-260328- Weights
- Closed weights
What Seed 2.0 Pro costs in practice
Worked from the standard list rates above, with the math shown so you can swap in your own token counts. These use the base rates, which apply while each request's prompt stays at or under 128,000 tokens; above that, Seed 2.0 Pro bills $1 input and $6 output for the whole request.
A chat app
10,000 requests a day at 2K input and 500 output tokens each.
- Input20M x $0.50 = $10.00
- Output5M x $3 = $15.00
$25.00per day
$750.00 per 30-day month
The same session at a 90% cache hit
90% of the input is read from the prompt cache. The one-time cache write premium is not included.
- Cached input0.9M x $0.10 = $0.09
- Uncached input0.1M x $0.50 = $0.05
- Output0.1M x $3 = $0.30
$0.44per session
Compare with
| Model | Input / 1M | Output / 1M |
|---|---|---|
| Seed 2.0 Pro (this page) | $0.50 | $3 |
| Gemini 3 Flash PreviewGoogle | $0.50 | $3 |
| Qwen3.6-PlusAlibaba Cloud (Qwen) | $0.50 | $3 |
| Qwen3.8-27BAlibaba Cloud (Qwen) | $0.50 | $3 |
| Amazon Nova ProAmazon | $0.80 | $3.20 |
| Dola Seed 2.1 TurboByteDance Seed | $0.50 | $2.50 |
| Seed 2.0 LiteByteDance Seed | $0.25 | $2 |
| Seed 2.0 MiniByteDance Seed | $0.10 | $0.40 |
FAQ
How much does Seed 2.0 Pro cost per million tokens?
Seed 2.0 Pro costs $0.50 per 1M input tokens and $3 per 1M output tokens on ByteDance Seed's first-party API, per docs.byteplus.com on October 17, 2026. Per 1M tokens, cache reads cost $0.10, and the batch rate is $0.25 input and $1.50 output. Prompts over 128,000 tokens are billed at $1 input and $6 output for the whole request.
What is Seed 2.0 Pro's context window?
Seed 2.0 Pro has a 256,000-token context window and returns up to 128,000 output tokens per response.
Are Seed 2.0 Pro's weights open?
No. Seed 2.0 Pro is a closed-weights model. You call it through ByteDance Seed's API as seed-2-0-pro-260328.
Sources
Last verified from docs.byteplus.com.
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