AI API Proxy
AI API Proxy is a pay-as-you-go service that provides an OpenAI-compatible interface for DeepSeek language models. By simply changing the base URL and API key in existing OpenAI SDK code, developers can immediately switch to using DeepSeek Chat and DeepSeek Reasoner models. The service is designed to significantly reduce costs compared to GPT-4, advertising prices up to 90% lower while maintaining a similar API contract. It supports prepaid credits that never expire, and no subscription is required. The proxy currently offers two models: DeepSeek Chat at $1.00 per million input tokens and $2.00 per million output tokens, and DeepSeek Reasoner at $2.00 per million input and $8.00 per million output. While DeepSeek’s official API is cheaper, this proxy simplifies access by removing regional restrictions and phone verification: users can sign up with only an email address. Global accessibility is ensured with rate limits that scale according to the account balance tier. AI API Proxy targets developers and teams who rely on OpenAI’s ecosystem but wish to cut expenses without rewriting their applications. The service is not open source; all infrastructure is managed by the provider, and users interact solely through the API endpoint. Documentation and example code are provided to ease integration.
- Category
- Apis
- Pricing
- Paid
Problem solved
It reduces the cost of using large language models by offering a drop-in replacement for OpenAI’s API that routes requests to cheaper DeepSeek models, eliminating the need for code rewrites or complex model switching while maintaining a familiar developer experience.
Use cases
- Replace GPT-4 with lower-cost models in existing OpenAI SDK-based applications
- Prototype AI applications with pay-as-you-go pricing and no long-term commitments
- Access reasoning-heavy language tasks at a fraction of the cost of similar services
- Simplify global deployment by avoiding phone verification and regional restrictions
- Test DeepSeek models in development environments before adopting the official API
Audience
- Developers
- ML Engineers
- Data Scientists
- Startups
Pros
- OpenAI-compatible API requires minimal code changes
- Pay-as-you-go with no subscription and balance never expires
- Significantly cheaper than GPT-4 for common use cases
- No phone number required for sign-up; instant access
- Global access with fast response times and clear rate limits
Cons
- DeepSeek models may not match GPT-4 quality on all tasks
- Higher cost than DeepSeek’s official API (approx. 7x input price)
- Limited to only two DeepSeek models, lacking broader model choice
- Reliance on a third-party proxy adds potential latency or reliability risks
- Rate limits tied to balance tier could restrict heavy usage
Official website: https://api.aifreeaistack.com/
Canonical LambdaBase page: https://www.lambdabase.com/tools/ai-api-proxy