Documentation Index
Fetch the complete documentation index at: https://docs.apiyi.com/llms.txt
Use this file to discover all available pages before exploring further.
User Groups and Model Permissions
Automatic Upgrade for Recharged Users
After recharging, the platform periodically adjusts recharged users to VIP or SVIP groups, which unlocks all models.Automatic Group Adjustment
- Recharged users are automatically assigned to VIP/SVIP groups
- VIP/SVIP users can use all available models on the platform
- Group adjustment usually completes automatically after recharging
Manual Group Adjustment
If your group hasn’t been automatically adjusted after recharging, contact customer service for manual adjustment:Enterprise WeChat

Specific Reasons for Model Unavailability
1. High-Price Model Restrictions
Most models can be used normally, but a few high-price models have restrictions for thedefault group:
- Example:
claude-opus-4-20250514and other newly released high-end models - Reason: Due to high cost, not yet open to default group
- Solution: Recharge to upgrade to VIP/SVIP group for access
2. Platform Discontinued Models
Some models are unavailable because official platforms have discontinued them:- Example:
gpt-4.5-preview - Reason: OpenAI platform has discontinued this model
- Result: We also discontinued it accordingly and cannot continue providing service
Model Discontinuation ExplanationWhen original AI service providers (such as OpenAI, Anthropic, etc.) discontinue a model, we also synchronously discontinue that model. This ensures service stability and consistency.
User Group Description
Default Group
- Permissions: Basic model access
- Restrictions: Some high-price models unavailable
- Applicable: Free users and newly registered users
VIP/SVIP Groups
- Permissions: All available model access
- Advantages: Including latest and high-end models
- How to Obtain: Automatic or manual adjustment after recharging
Check Model Availability
Confirm Current Group
- Log into console to view account information
- Confirm current user group level
- View available model list
Test Model Calls
- Use test function in API documentation
- Try calling specific model
- View returned error information
Common Solutions
- Recharge Upgrade: Most direct solution, unlocks all models
- Contact Customer Service: Handling when group not adjusted after recharging
- Choose Alternative Model: Use other available models with similar functions
- Wait for Updates: Follow platform announcements for new model launch information