PRICING
Credits: pay for what you use
No monthly fee or minimum spend. Each request is charged by actual token use at the selected model's rate, with an estimate before you start.
Complete your profile to receive 8,000 Credits
$0.03
1 Credit = $0.03
100 Credits equal USD $3. Check your balance and each charge by feature, model, and input and output tokens.
Per token
Usage-based
Cost = input tokens × input rate + output tokens × output rate, priced per million tokens. Output costs more because it requires more computation.
Settled after use
Pay when a task ends
An estimated amount is reserved at the start and adjusted when the task ends. Failures caused by the system are fully refunded.
Purchased Credits do not expire. Complete your profile for 8,000 bonus Credits, valid for 90 days and used first.
MODEL PRICING
Choose the right model for the work
Choose models for writing, ideas, or economical batch imports. Each model selector shows an estimated Credits cost per use before you start.
| Model | Best for | Input | Cached input | Output |
|---|---|---|---|---|
| GPT-6 AstraOverseas · flagship | Paper ideas, topics, and research hypotheses | 6,000 | 600 | 30,000 |
| Gemini ProOverseas · flagship | Long-form writing, review drafts, and editing | 4,000 | 400 | 16,000 |
| Kimi K3Domestic · strongest | Deep questions, reasoning, and experiment design | 4,000 | 400 | 20,000 |
| Qwen3.8 MaxDomestic | Analysis and cross-paper comparisons | 600 | 60 | 2,400 |
| GLM 5.3Domestic | Chinese writing and rewriting | 400 | 40 | 1,600 |
| DeepSeek FlashDomestic · economical | Batch imports and lightweight questions | 100 | 10 | 400 |
Prices are in Credits per million tokens (1 Credit = USD $0.03). Cached input reuses analyzed content within a Library and costs one tenth of the input rate. Overseas flagship model costs may vary with upstream pricing, approximately 2–3 times the listed baseline. An estimate for the selected model is shown before each run; charges follow confirmation.
TYPICAL COSTS
Choose the right model: import a paper for under $5,
draft a paper for $9–150
Costs for the same task can vary many times by model. Economical models suit imports and questions; flagship models suit ideas and drafting. These examples use estimated token consumption; your actual usage determines the charge.
Generate a Wiki for 20 papers
Analyze full papers to extract concepts, methods, and citations; updates process only additions. The import model largely determines cost.
≈ 150–7,000 Credits ($4.5–210)
DeepSeek Flash ≈ $4.5; GLM 5.3 ≈ $18; Kimi K3 ≈ $210
Ask a Library question
Answers use the Library Wiki. Cached input for repeated questions in one Library costs one tenth of the input rate.
≈ 3–110 Credits ($0.1–3.3)
Economical models cost a few cents; Kimi K3 ≈ $3; cache hits cost less
Write a paper draft
Ideas → experiments → outline → draft → compilation → review: about 5–10 steps and over a million tokens. Astra for ideas and Gemini for writing are recommended; economical models can also be used throughout.
≈ 300–5,000 Credits ($9–150)
Economical combinations from $9; multiple iterations with flagship models may exceed $300
COMPARED WITH BUYING APIs
Why use SciArk Credits?
Rates below official retail
Aggregate purchasing usually brings prices 30%–50% below direct official API retail, without managing foreign-currency payments, proxies, or network access.
One balance across models
Use one Credits balance across models and features instead of managing accounts, deposits, and keys on multiple platforms.
Choose per task
A vendor token bundle is tied to its models. Choose per task in SciArk: Astra for ideas, Gemini for writing, or K3 for analysis.
Save with cached context
When Library Wiki content is retrieved repeatedly, cached input costs one tenth of the input rate—especially useful for follow-ups and revision.
As a rough comparison, a $100 vendor token bundle is tied to one provider; the same $100 buys over 3,000 SciArk Credits that can be allocated across models by task.
REFERRALS
Invite a colleague. Both receive Credits.
Share your invitation link with people in your lab or research group.
Send an invitation
Copy your personal invitation link from the app's balance panel and share it with a colleague or group.
Your colleague registers
The referral counts after your colleague registers through the link and verifies their email.
Both receive Credits
You receive 2,000 Credits; your colleague receives 1,000 (9,000 total with the welcome gift). Rewards are credited automatically; no code is needed.
Referral rewards are bonus Credits valid for 90 days. Bulk registrations from the same device or email batch do not qualify. Each user can receive rewards for at most 50 valid referrals.
CAMPUS AMBASSADORS
Bring SciArk to your campus
For undergraduate and graduate students and early-career faculty. Approved ambassadors receive enhanced referral rewards and dedicated benefits.
Referral reward × 1.5
Receive 3,000 Credits per valid referral (1.5 times the standard reward), with no cap.
Dedicated materials
Use campus poster templates, presentation slides, a tracked invitation link, and a QR code.
Early access
Try new writing and search features early and share feedback directly with the product team.
Campus events
Exclusive redemption codes and limited gifts for ambassador communities during term and paper-writing seasons.
FAQ
Questions about billing
01Do Credits expire?
Purchased Credits do not expire. The 8,000 profile-completion bonus Credits are valid for 90 days; you are reminded one week before expiry. Credits expiring first are used first.
02Can a task exceed my balance?
An estimated amount is reserved before a task starts. Insufficient balance prevents the task from starting. A running task may finish with a small overdraft, which must be covered before the next use.
03Where can I see each charge?
The balance panel records each charge, including feature, model, input and output token counts, and Credits.
04Am I charged for a failed task?
System-caused failures are fully refunded. If you cancel, actual usage is charged. Running tasks on a deactivated account are settled by actual usage and the remainder is refunded.
Start with bonus Credits
Complete your profile for 8,000 Credits—enough to build a 20-paper Library and ask dozens of follow-up questions.