API Need5% off
Uptime
Total Context
262.144K
Max Output
262.144K
Input
$0.855/ 1M
Output
$4.275/ 1M
Cache Read
$0.171/ 1M
Cache Write
Route priced
BByteDance: Seed 2.1 Pro API
seed-2.1-pro
Seed 2.1 Pro API is a ByteDance multimodal model with text and image input and a 262K context. Its relatively small 5% discount makes benchmark behavior and official price more important than the savings headline. [1]
The highlighted high-effort row ranks #14 with a 49.35 median, while the standard row ranks #43. Both measured runs are slow relative to nearby entries, so interactive use requires direct latency testing. [1][2]
MODALITIES
Price$0.855 / $4.275 / 1MCONTEXT262.144K
Playground
Test Seed 2.1 Pro API with representative production prompts before using seed-2.1-pro in a live workflow.
Providers
APINEED lists Seed 2.1 Pro API with text and image input, text output, and a 262.144K context window. APINEED routing and prepaid rates are identified separately. [1]
Discount
APINEED reduces the official $0.90 input and $4.50 output rates by 5% to $0.855 and $4.275. This is the smallest catalog discount and should be stated precisely. The table compares official Seed 2.1 Pro API pricing with the APINEED prepaid rate.
Official
Provider baselineInput $0.9/ 1MOutput $4.5/ 1M
BaselineAPINEED5% off
Prepaid creditsInput $0.855/ 1MOutput $4.275/ 1M
Availability
APINEED continuously monitors Seed 2.1 Pro API access and keeps requests on healthy capacity.
System statusLast 90 days
Seed 2.1 Pro API Benchmarks
Seed’s high row sits one place below DeepSeek V4 Pro, with a similar median but longer measured time. Its standard row is near the bottom of the current table. The complete LLM2014 logic 2026-07 table remains below, with Seed 2.1 Pro API highlighted when a current row exists. [2]
| 1st | GPT-5.5 (xhigh) | 83.80 | 77.46 | 7.57% | 494s | 30,811 | $25.51 | $29.57 |
| 2nd | Kimi-K3 (max) | 82.91 | 74.80 | 9.78% | 1095s | 39,912 | $16.76 | $15.00 |
| 3rd | Claude Opus 4.8 (xhigh) | 82.62 | 66.70 | 19.27% | 791s | 41,833 | $28.86 | $24.64 |
| 4th | GPT-5.6 Sol (xhigh) | 81.94 | 72.99 | 10.92% | 369s | 17,433 | $14.43 | $29.57 |
| 5th | Claude Opus 5 (xhigh) | 78.38 | 71.88 | 8.29% | 426s | 26,392 | $18.21 | $24.64 |
| 6th | Qwen3.7-Max (xhigh) | 74.56 | 66.95 | 10.21% | 374s | 54,207 | $7.81 | $5.14 |
| 7th | GLM-5.2 (max) | 73.68 | 58.27 | 20.91% | 890s | 45,683 | $5.12 | $4.00 |
| 8th | Gemini 3.1 Pro (high) | 73.36 | 58.46 | 20.31% | 214s | 25,905 | $8.58 | $11.83 |
| 9th | GPT-5.6 Luna (xhigh) | 69.49 | 51.97 | 25.21% | 242s | 38,083 | $6.31 | $5.91 |
| 10th | DeepSeek V4 Pro (max) | 68.00 | 49.97 | 26.51% | 1468s | 60,558 | $1.45 | $0.86 |
| 11th | Grok 4.5 (high) | 67.59 | 56.72 | 16.08% | 451s | 43,372 | $7.18 | $5.91 |
| 12th | Muse Spark 1.1 | 66.18 | 57.23 | 13.52% | 542s | 42,416 | $4.98 | $4.19 |
| 13th | Gemini 3.5 Flash (high) | 65.92 | 60.39 | 8.39% | 188s | 36,372 | $9.03 | $8.87 |
| 14th | Doubao-Seed-2.1-pro (high) | 58.69 | 49.35 | 15.91% | 2003s | 85,059 | $10.21 | $4.29 |
| 15th | Qwen3.7-Plus (high) | 58.50 | 44.09 | 24.63% | 1237s | 57,152 | $1.83 | $1.14 |
| 16th | Gemini 3.6 Flash (high) | 56.87 | 41.74 | 26.6% | 206s | 26,329 | $5.45 | $7.39 |
| 17th | Tencent Hy3 (high) | 54.42 | 44.60 | 18.04% | 1035s | 52,037 | $0.83 | $0.57 |
| 18th | Claude Sonnet 5 (xhigh) | 51.37 | 43.14 | 16.02% | 529s | 44,118 | $12.18 | $9.86 |
| 19th | DeepSeek V4 Flash (max) | 50.62 | 36.24 | 28.41% | 611s | 49,593 | $0.40 | $0.29 |
| 20th | MiniMax-M3 | 49.18 | 40.94 | 16.75% | 985s | 56,467 | $1.90 | $1.20 |
| 21st | Claude Opus 5 | 42.08 | 31.73 | 24.6% | 154s | 10,180 | $7.02 | $24.64 |
| 22nd | Claude Opus 4.6 | 36.88 | 25.79 | 30.07% | 65s | 4,387 | $3.03 | $24.64 |
| 23rd | Doubao-Seed-2.0-lite 0428 (high) | 35.32 | 26.77 | 24.21% | 656s | 26,726 | $0.38 | $0.51 |
| 24th | Gemini 3.5 Flash (minimal) | 33.24 | 22.22 | 33.15% | 44s | 6,189 | $1.54 | $8.87 |
| 25th | Ling-3.0-flash | 32.53 | 20.62 | 36.61% | 688s | 86,204 | $0.00 | $0.00 |
| 26th | Gemini 3.5 Flash Lite (high) | 30.23 | 22.82 | 24.51% | 188s | 18,297 | $1.26 | $2.46 |
| 27th | GPT-5.5 Instant | 28.87 | 17.66 | 38.83% | 25s | 1,673 | $1.39 | $29.57 |
| 28th | Gemma 4 31B | 27.91 | 22.04 | 21.03% | 770s | 15,050 | $0.17 | $0.39 |
| 29th | MiMo-V2.5-Pro | 26.91 | 13.00 | 51.69% | 478s | 29,443 | $0.71 | $0.86 |
| 30th | Qwen3.7-Plus | 26.19 | 16.23 | 38.03% | 314s | 8,692 | $0.28 | $1.14 |
| 31st | Step-3.7-Flash | 26.18 | 13.74 | 47.52% | 258s | 44,912 | $1.46 | $1.16 |
| 32nd | Qwen3.5-27B | 24.96 | 17.98 | 27.96% | 451s | 26,391 | $0.51 | $0.69 |
| 33rd | Gemini 3.1 Flash Lite (high) | 23.78 | 14.30 | 39.87% | 82s | 28,351 | $1.17 | $1.48 |
| 34th | Claude Sonnet 5 | 23.64 | 10.86 | 54.06% | 109s | 5,962 | $1.65 | $9.86 |
| 35th | Qwen3.7-Max | 22.45 | 18.53 | 17.46% | 196s | 6,710 | $0.97 | $5.14 |
| 36th | ERNIE 5.1 | 20.49 | 15.49 | 24.4% | 457s | 24,093 | $1.73 | $2.57 |
| 37th | openPangu-2.0-Flash | 19.83 | 10.76 | 45.74% | 571s | 28,199 | $0.18 | $0.23 |
| 38th | LongCat-2.0 | 19.40 | 9.74 | 49.79% | 395s | 14,886 | $0.48 | $1.14 |
| 39th | DeepSeek V4 Flash | 19.39 | 13.37 | 31.05% | 63s | 5,286 | $0.04 | $0.29 |
| 40th | Mistral Medium 3.5 | 18.44 | 13.87 | 24.78% | 194s | 27,854 | $5.77 | $7.39 |
| 41st | Doubao-Seed-2.1-pro | 17.49 | 9.74 | 44.31% | 305s | 6,009 | $0.72 | $4.29 |
| 42nd | GLM-5.2 | 14.80 | 10.43 | 29.53% | 23s | 953 | $0.11 | $4.00 |
| 43rd | Ling-2.6-1T | 13.05 | 8.39 | 35.71% | 229s | 4,770 | $0.31 | $2.29 |
| 44th | iFLYTEK Spark X2 | 12.39 | 6.21 | 49.88% | 458s | 11,285 | $0.09 | $0.29 |
| 45th | Gemini 3.1 Flash Lite | 11.79 | 10.28 | 12.81% | 9s | 773 | $0.03 | $1.48 |
| 46th | Mistral Medium 3.5 | 10.83 | 7.13 | 34.16% | 17s | 2,546 | $0.53 | $7.39 |
| 47th | Ling-2.6-flash | 10.07 | 4.85 | 51.84% | 25s | 4,997 | $0.04 | $0.30 |
Quick Start
Connect Seed 2.1 Pro API without changing the OpenAI-style request shape. Use Seed for text-plus-image analysis and Chinese ecosystem evaluations within 262K context. Test high and standard reasoning modes separately before setting production defaults.
Get your API key
Create an APINEED key for Seed 2.1 Pro API and keep it in an environment variable.
export API_NEED_API_KEY=sk-apineed-v1-...Make your first request
Use seed-2.1-pro for Seed 2.1 Pro API with the APINEED API. The request shape is compatible with OpenAI chat completions, so most SDKs only need a base URL change.
TypeScript SDKPythoncURLOpenAI SDK
import OpenAI from "openai";
const client = new OpenAI({
apiKey: process.env.API_NEED_API_KEY,
baseURL: "https://apineed.com/v1"
});
const result = await client.chat.completions.create({
model: "seed-2.1-pro",
messages: [
{ role: "user", content: "Why is the sky blue?" }
]
});
console.log(result.choices[0].message.content);Enable streaming and fallbacks
Add stream: true when Seed 2.1 Pro API should return server-sent events. APINEED keeps routing, provider health, and fallback handling behind the same endpoint.
curl https://apineed.com/v1/chat/completions \
-H "Authorization: Bearer $API_NEED_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"model": "seed-2.1-pro",
"stream": true,
"messages": [{ "role": "user", "content": "Hello" }]
}'Seed 2.1 Pro API Endpoint
Seed 2.1 Pro API accepts chat conversations here with streaming or non-streaming text output; the supported controls are listed on this page.
POST
/v1/chat/completions- Authorization
- Bearer $API_NEED_API_KEY
- Content-Type
- application/json
- HTTP-Referer
- optional - your site URL, for rankings
- X-Title
- optional - your site name, for rankings
- Model
- seed-2.1-pro
Parameters
Seed 2.1 Pro API parameters currently listed for seed-2.1-pro by the OpenRouter Models API. [1]
APINEED does not currently publish a supported-parameter list for this model slug.
Seed 2.1 Pro API Q&A
Model-specific answers for teams comparing Seed 2.1 Pro API on capability, benchmark evidence, integration, and cost.
Is the Seed 2.1 Pro API discount 15%?
No. The current APINEED discount is 5%, based on $0.90 input and $4.50 output official rates.
Why are two Seed benchmark rows shown for Seed 2.1 Pro API?
LLM2014 lists high and standard configurations separately; the high run ranks #14 and the standard run ranks #43.
Can Seed 2.1 Pro API analyze images?
Yes. Its input modalities are text and image, with text output.
What should interactive apps test first for Seed 2.1 Pro?
For Seed 2.1 Pro API, measure real response latency and compare reasoning modes, because both benchmark runs took longer than many neighboring models.
Which endpoint serves Seed 2.1 Pro API?
Call Seed 2.1 Pro API through https://apineed.com/v1/chat/completions with seed-2.1-pro as the model value. Existing OpenAI SDK clients usually need only the APINEED base URL and key.
How do I validate Seed 2.1 Pro API before release?
Evaluate Seed 2.1 Pro API on representative prompts, record quality, latency, and token use, then choose reasoning settings and fallbacks from those results.
How to Deploy the Seed 2.1 Pro API on apineed.com
Deploy Seed 2.1 Pro API through APINEED after validating its model-specific trade-offs above. The API key, credit, and endpoint flow stays consistent across the catalog.
Add credits for Seed 2.1 Pro API
Add credits on APINEED before deploying the Seed 2.1 Pro API. Pay-as-you-go billing lets usage start small and scale with production traffic.
Get your API key
Create an APINEED API key for the Seed 2.1 Pro API. The same key can call Seed 2.1 Pro and other AI APIs through apineed.com.
Set the model slug
Use seed-2.1-pro as the model value when you deploy the Seed 2.1 Pro API. Keep the APINEED base URL at https://apineed.com/v1.
Send a request to Seed 2.1 Pro API
Send chat completions or responses to the Seed 2.1 Pro API from Claude Code, Codex, or any custom agent. The request keeps its OpenAI-compatible shape.