Access and Use Baidu: ERNIE 4.5 21B A3B via OpenRouter using API Key
Ann Ng
Access and Use ernie-4.5-21b-a3b via OpenRouter
A sophisticated text-based Mixture-of-Experts (MoE) model featuring 21B total parameters with 3B activated per token, delivering exceptional multimodal understanding and generation through heterogeneous MoE structures and modality-isolated routing. Supporting an extensive 131K token context length, the model achieves efficient inference via multi-expert parallel collaboration and quantization, while advanced post-training techniques including SFT, DPO, and UPO ensure optimized performance across diverse applications with specialized routing and balancing losses for superior task handling.
Baidu: ERNIE 4.5 21B A3B Overview
| Full Name | Baidu: ERNIE 4.5 21B A3B |
| Provider | Baidu |
| Model ID | baidu/ernie-4.5-21b-a3b |
| Release Date | Aug 12, 2025 |
| Context Window | 120,000 tokens |
| Pricing /1M tokens | $0.00000007 for input $0.00000028 for output |
| Supported Input Types | text |
| Supported Parameters | frequency_penaltylogit_biasmax_tokensmin_ppresence_penaltyrepetition_penaltyseedstoptemperaturetop_ktop_p |
Complete Setup Guide
Create OpenRouter Account
- Visit openrouter.ai
- Click "Sign In" and create an account (free)
- Verify your email address
- You'll receive $1 in free credits to test models
Get Your OpenRouter API Key
- Log in to OpenRouter dashboard
- Go to "API Keys" section in the menu
- Click "Create API Key"
- Give it a name (e.g., "TypingMind")
- Copy your API key (starts with "sk-or-v1-...")
Add Credits to OpenRouter (Optional)
- Go to "Credits" in OpenRouter dashboard
- Click "Add Credits"
- Choose amount ($5 minimum, $20 recommended for testing)
- Complete payment (credit card or crypto)
- Credits never expire!
Configure TypingMind with OpenRouter API Key
Method 1: Direct Import (Recommended)
- Open TypingMind in your browser
- Click the "Settings" icon (gear symbol)
- Navigate to "Manage Models" section
- Click "Add Custom Model"
- Select "Import OpenRouter" from the options
- Enter your OpenRouter API key from Step 1
- Click "Check API Key" to verify the connection
- Choose which models you want to add from the list (you can add multiple at once)
- Click "Import Models" to complete the setup
Method 2: Manual Custom Model Setup
- Open TypingMind in your browser
- Click the "Settings" icon (gear symbol)
- Navigate to "Models" section
- Click "Add Custom Model"
- Fill in the model information:Name:
baidu/ernie-4.5-21b-a3b via OpenRouter(or your preferred name)Endpoint:https://openrouter.ai/api/v1/chat/completionsModel ID:baidu/ernie-4.5-21b-a3bContext Length: Enter the model's context window (e.g., 120000 for baidu/ernie-4.5-21b-a3b)
baidu/ernie-4.5-21b-a3bhttps://openrouter.ai/api/v1/chat/completionsbaidu/ernie-4.5-21b-a3b via OpenRouterhttps://www.typingmind.com/model-logo.webp120000 - Add custom headers by clicking "Add Custom Headers" in the Advanced Settings section:Authorization:
Bearer <OPENROUTER_API_KEY>:X-Title:typingmind.comHTTP-Referer:https://www.typingmind.com - Enable "Support Plugins (via OpenAI Functions)" if the model supports the "functions" or "tool_calls" parameter, or enable "Support OpenAI Vision" if the model supports vision.
- Click "Test" to verify the configuration
- If you see "Nice, the endpoint is working!", click "Add Model"
Start chatting with baidu/ernie-4.5-21b-a3b
Now you can start chatting with the baidu/ernie-4.5-21b-a3b model via OpenRouter on TypingMind:
- Select your preferred baidu/ernie-4.5-21b-a3b model from the model dropdown menu
- Start typing your message in the chat input
- Enjoy faster responses and better features than the official interface
- Switch between different AI models as needed
baidu/ernie-4.5-21b-a3bPro tips for better results:
- Use specific, detailed prompts for better responses (How to use Prompt Library)
- Create AI agents with custom instructions for repeated tasks (How to create AI Agents)
- Use plugins to extend baidu/ernie-4.5-21b-a3b capabilities (How to use plugins)
- Upload documents and images directly to chat for AI analysis and discussion (Chat with documents)
Why TypingMind + OpenRouter?
- Best-in-class UI: TypingMind's interface is far superior to standard chat UIs
- Model flexibility: Switch between Baidu: ERNIE 4.5 21B A3B and 200+ models instantly
- Cost control: Pay only for what you use through OpenRouter
- One-time purchase: Buy TypingMind once, use forever with any OpenRouter model
- Data privacy: Your conversations stored locally, not on external servers
Frequently Asked Questions
Do I need a subscription to use Baidu: ERNIE 4.5 21B A3B?
No! Through OpenRouter, you pay only for what you use with no monthly subscription. Add credits to your OpenRouter account and they never expire. TypingMind is also a one-time purchase, not a subscription.
How much will it cost to use Baidu: ERNIE 4.5 21B A3B?
It costs 0.00000007 for input and 0.00000028 for output via OpenRouter. A typical conversation might cost $0.01-0.10 depending on length. Start with $5-10 in credits to test.
Can I use other models besides Baidu: ERNIE 4.5 21B A3B?
Yes! With OpenRouter + TypingMind, you get access to 200+ models including GPT-4, Claude, Gemini, Llama, Mistral, and many more. Switch between them instantly in TypingMind.
Is my data private and secure?
Yes! TypingMind stores conversations locally (web version in browser, desktop version on your device). OpenRouter handles API calls securely and doesn't train on your data. Check each provider's data policy for specifics.
Can I use Baidu: ERNIE 4.5 21B A3B for commercial projects?
Yes! Check Baidu's terms of service for specific commercial use policies. OpenRouter and TypingMind both support commercial use.
What if Baidu: ERNIE 4.5 21B A3B is unavailable?
OpenRouter allows you to configure fallback models. If Baidu: ERNIE 4.5 21B A3B is down, it can automatically route to your backup choice. You can also manually switch models in TypingMind anytime.
How do I cancel or get a refund?
OpenRouter: No subscriptions to cancel. Unused credits remain in your account forever.
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