Seed 2.1 Pro
ByteDance's strongest reasoning/agent model, sold via Volcengine Ark (CN) and BytePlus ModelArk (intl) — but you must pull the rate card from the console yourself, as no fetchable official page publishes it.
Data checked 2026-09-06- Context window
- 256K tokens in
- Max output
- —
- Input
- $0.89 per 1M tokens
- Output
- $4.45 per 1M tokens
- Blended
- $1.78 3:1 in:out
- Released
- 2026
A What it is for
At a three-to-one input-to-output ratio, Seed 2.1 Pro costs $1.78 per million tokens blended. A workload of one million input and 330,000 output tokens per day would run about $70.83 per month at list price, before caching or batch discounts.
B Capabilities
| Input modalities | text, image, video |
|---|---|
| Output modalities | text |
C Others from Chinese AI labs
| Model | Context | Max out | In $/M | Out $/M | Blended | Status |
|---|---|---|---|---|---|---|
Kimi K3
kimi-k3
|
1M | — | $2.98 | $14.90 | $5.96 | ga open |
Kimi K2.7 Code
kimi-k2.7-code
|
262.1K | — | $0.95 | $4.00 | $1.71 | ga open |
Kimi K2.7 Code Highspeed
kimi-k2.7-code-highspeed
|
262.1K | — | $1.90 | $8.00 | $3.42 | ga open |
Kimi K2.6
kimi-k2.6
|
262.1K | — | $0.97 | $4.02 | $1.73 | ga open |
GLM-5.3
glm-5.3
|
1M | 131.1K | $1.40 | $4.40 | $2.15 | ga open |
GLM-5.3-Flash
glm-5.3-flash
|
1M | 131.1K | $0.07 | $0.25 | $0.12 | ga open |
GLM-5.2
glm-5.2
|
1M | 131.1K | $1.40 | $4.40 | $2.15 | ga open |
GLM-5
glm-5
|
200K | 131.1K | $1.00 | $3.20 | $1.55 | ga open |
GLM-4.7
glm-4.7
|
200K | 131.1K | $0.60 | $2.20 | $1.00 | ga open |
GLM-4.7-FlashX
glm-4.7-flashx
|
200K | 131.1K | $0.07 | $0.40 | $0.15 | ga |
GLM-4.7-Flash
glm-4.7-flash
|
200K | 131.1K | $0.00 | $0.00 | $0.00 | ga |
GLM-4.6V
glm-4.6v
|
128K | — | $0.30 | $0.90 | $0.45 | ga |
How this model is billed. Volcengine Ark official price doc 模型价格 (last updated 2026-09-04), section 在线推理（常规）, model ID doubao-seed-2.1-pro (versioned doubao-seed-2-1-pro-260628). Published CNY figures: input (non-audio) 6.00 元/百万token, output 30.00 元/百万token, cache-hit input 1.20 元/百万token, cache storage 0.017 元/百万token/hour; single tier 输入长度 [0, 256] 千token. Batch inference (批量推理) is half price: 3.00 in / 15.00 out. Conve
D Verify before you commit
Model pricing changes without notice and this page is a snapshot. Confirm against the vendor's own page before you build a budget on it.
Source: volcengine.com · checked 2026-09-06 · Chinese AI labs pricing · API docs