AI has become an essential part of modern software development. From AI chatbots and content generators to coding assistants, image generators, automation tools, and AI-powered SaaS applications, developers increasingly rely on APIs to integrate artificial intelligence into their products.
The good news is that you don’t always need an expensive subscription to start experimenting with AI models. Several platforms offer free AI API access, free credits, or free usage tiers that allow developers to test different AI models without paying upfront.
In this guide, we’ll look at the best websites to get free AI API keys, what each platform offers, and which option may be best for your project.
What Is an AI API Key?
An AI API key is a unique authentication credential that allows an application to communicate with an AI service through its API.
For example, if you’re building an AI chatbot, your application can send a user’s prompt to an AI model through an API. The model processes the request and returns a response that your application displays to the user.
A typical workflow looks like this:
Your App → API Request → AI Provider → AI Model → API Response → Your App
API keys are used to authenticate these requests and associate API usage with your account.
Are Free AI API Keys Really Free?
Yes, but there is an important distinction.
Some providers offer completely free API usage within specific limits, while others provide:
- Free trial credits
- Monthly free quotas
- Daily request limits
- Free access to selected models
- Free inference through specific platforms
- Community or developer tiers
Therefore, you should always check the provider’s current limits before building your application around a free API.
Best Websites to Get Free AI API Keys
1. OpenRouter
OpenRouter is one of the best options if you want to access multiple AI models through a single API.
Instead of creating separate integrations for different AI providers, OpenRouter gives developers a unified API that can access hundreds of models. Its current catalog includes models from numerous providers and supports filtering models by capabilities, pricing, context length, and other properties.
One of the biggest reasons developers look at OpenRouter for free AI API access is its collection of free models.
OpenRouter provides a :free model variant and also offers an openrouter/free router that automatically selects an available free model.
Why use OpenRouter?
- Access hundreds of AI models
- One API for multiple providers
- OpenAI-compatible API
- Free models available
- Easy model switching
- Useful for AI agents and coding tools
- Supports text, image and other modalities depending on the model
OpenRouter’s free models have rate limits, so they are generally more appropriate for experimentation and low-volume applications than demanding production workloads.
Best for: Developers who want to experiment with many AI models using one API.
2. OrcaRouter
OrcaRouter is another multi-provider AI gateway designed to provide access to different AI models through a unified API.
OrcaRouter describes itself as an OpenAI-compatible API gateway and supports providers and model ecosystems including OpenAI, Anthropic, Google Gemini, DeepSeek, xAI Grok, Qwen, Kimi and others.
The platform also advertises zero markup on token costs and supports automatic routing, fallback chains and model selection.
Its website currently advertises signup without a credit card, although specific free usage and account limits can change.
Why use OrcaRouter?
- One API for multiple AI providers
- OpenAI-compatible interface
- Automatic model routing
- Fallback support
- No token markup according to the provider
- Useful for AI agents and applications
Best for: Developers looking for a unified gateway to multiple AI models.
3. TokenRouter
TokenRouter is another platform designed around unified AI model routing.
Its API provides an OpenAI-compatible endpoint and can route requests across multiple AI providers. Its documentation says the platform supports multiple providers while providing features such as budgets, rate limits and analytics.
TokenRouter’s current Free plan does not require a credit card, although its standard setup is based on a BYOK model where users add their own provider keys.
Key features
- Unified API
- Multiple AI providers
- OpenAI-compatible API
- Budget controls
- Rate limits
- Usage analytics
- Team management
- BYOK support
Best for: Developers and teams that want centralized AI API management.
4. TeamRouter
TeamRouter is another option worth exploring if your goal is to manage access to multiple AI models and providers through a centralized routing layer.
Platforms in this category can be particularly useful when you’re building applications that need to switch between different AI models without changing your entire application architecture.
Before relying on TeamRouter’s free access for a production project, check its current pricing, model availability and usage limits because these offerings can change.
Best features to look for
- Multiple model access
- Unified API
- API key management
- Usage controls
- Model routing
- Team-based access
Best for: Teams and developers experimenting with multi-provider AI infrastructure.
5. Grok
Groq is one of the most popular platforms for developers who prioritize AI inference speed.
Groq provides API access to supported models through its GroqCloud platform. Its Free tier allows developers to create API keys and use supported models within rate limits, and the provider states that users on the Free plan are not charged when they exceed those limits.
Groq is particularly interesting for:
- AI chatbots
- coding assistants
- AI agents
- Real-time applications
- Voice applications
- High-speed inference
- Why Grok?
The major advantage is speed.
If your application needs fast responses rather than maximum model variety, Groq can be an excellent option.
Best for: Developers who want very fast AI responses with a free API tier.
6. SambaNova AI
SambaNova Systems provides AI inference through its SambaCloud platform.
Developers can create an account and obtain an API key to access supported models. SambaNova’s documentation also provides integration examples using models such as DeepSeek and MiniMax.
The platform is particularly focused on high-performance inference.
What can you build?
- AI chatbots
- coding assistants
- AI agents
- Text generation tools
- Enterprise AI applications
Best for: Developers looking for high-speed hosted AI inference.
7. Hugging Face
Hugging Face is one of the largest ecosystems for open-source AI models.
Hugging Face’s Inference Providers system gives developers a unified way to access models from multiple inference providers. The platform currently provides free monthly credits for free users, although the amount and terms can change.
Hugging Face supports a huge variety of AI workloads, including:
LLMs
text generation
Image generation
Speech
Embeddings
Classification
computer vision
RAG
Its Inference Providers ecosystem includes providers such as Cerebras, Groq, Together AI and Replicate.
Why Hugging Face?
The biggest advantage is the breadth of its AI model ecosystem.
You can discover thousands of models and experiment with them without having to deploy every model yourself.
Best for: Open-source AI experimentation and developers looking for a huge model catalog.
8. Mistral AI
Mistral AI is a major European AI company known for its language models and developer platform.
Mistral provides access to models designed for tasks such as:
text generation
coding
Reasoning
Document processing
OCR
Speech
AI agents
Mistral currently offers a Free plan that includes access to Mistral Studio, while API usage and pricing depend on the model and service being used.
Mistral is particularly attractive if you want to experiment with efficient language models and build AI applications around the Mistral ecosystem.
Best for: Developers building LLM, coding and document-AI applications.
9. NVIDIA Build
NVIDIA’s NVIDIA Build platform is another useful option for developers who want to experiment with hosted AI models.
NVIDIA Build provides access to NVIDIA NIM-based model endpoints, allowing developers to test supported models without running the infrastructure themselves.
Free access is subject to model-specific and account-specific limits. NVIDIA’s developer ecosystem has free-tier API access for many NIM endpoints, with limits varying by model and traffic.
Why NVIDIA Build?
- NVIDIA NIM models
- Hosted inference
- API access
- AI model playground
- OpenAI-compatible integrations for supported endpoints
- Useful for testing open and commercial models
Best for: Developers who want to experiment with NVIDIA-hosted AI inference.
10. Google Gemini
Google’s Gemini API is one of the strongest choices for developers looking for a mainstream AI API with a free tier.
Google AI Studio provides access to Gemini models and allows developers to create API keys for applications.
Google currently offers a Free Tier for selected Gemini API models, with free input and output tokens within the applicable model limits.
Gemini is useful for:
- AI chatbots
- coding
- Reasoning
- Multimodal applications
- image understanding
- Long-context applications
- AI agents
- Why choose Gemini?
Google’s ecosystem, model capabilities and developer tools make Gemini one of the easiest places to start experimenting with mainstream generative AI APIs.
Best for: General-purpose AI developers
11. xKiro
xKiro is a multi-model AI API platform that provides developers with access to different AI models through a unified API.
Its API supports both OpenAI Chat Completions and Anthropic Messages formats, allowing developers to use familiar SDKs. It also supports text, speech and image modalities.
The platform uses a standard API-key authentication system and provides a model catalog through its API.
Why consider xKiro?
- Multiple AI models
- OpenAI-compatible API
- Anthropic-Compatible API
- text generation
- Speech
- image capabilities
- Streaming
- Unified model IDs
Best for: Developers who want a single API interface for different AI models.
12. GMI Cloud
GMI Cloud provides cloud infrastructure and AI services, including APIs for AI inference.
GMI Cloud’s API documentation explains how developers can create an account, generate API credentials and authenticate requests using API keys.
GMI Cloud has also been used for promotional free-access campaigns around selected AI models, so it’s worth checking the current offers before signing up.
- AI inference
- GPU infrastructure
- AI applications
- Model experiment
- Cloud-based AI workloads
Best for: Developers looking for AI infrastructure and hosted inference.
13. Ollama
Ollama is slightly different from the other platforms on this list.
Ollama is primarily designed to let you run AI models locally on your own computer rather than relying on a hosted API provider.
Once Ollama is installed, it exposes a local API, by default at:
http://localhost:11434/api
Ollama’s official documentation confirms that developers can interact with locally running models programmatically through this API.
Why use Ollama?
You don’t need a traditional cloud API key when running models locally.
This can provide:
- Local AI inference
- More control over your data
- No per-request API charges
- Offline AI capabilities
- local development
- Open-source model experimentation
Ollama also supports cloud models through its cloud API infrastructure.
Best for: Developers who want to run AI models locally instead of paying for hosted inference.
14. Cerebras
Cerebras Systems is known for extremely fast AI inference.
Cerebras provides an Inference API that developers can use to access supported models.
The company currently offers a free trial with $5 in free credits after account creation, with access to Cerebras-powered models subject to its current terms and limits.
Why Cerebras?
Its biggest selling point is inference speed.
This makes it interesting for:
- Real-time chat
- coding assistants
- AI agents
- Interactive applications
- High-speed LLM applications
Best for: Developers who prioritize extremely fast inference.
15. Together AI
Together AI provides APIs for a broad selection of open-source AI models.
The platform is useful for developers who want access to different LLMs without managing their own GPU infrastructure.
However, it’s important to note that Together AI currently does not offer a free trial, according to its current documentation. Access requires a minimum $5 credit purchase.
So while Together AI is an excellent AI API platform, it should not be marketed as a completely free API provider.
Best for: Developers looking for production-oriented access to open-source AI models.
16. Fireworks AI
Fireworks AI is another popular AI inference platform focused on fast access to generative AI models.
Fireworks uses a pay-as-you-go model and currently provides free credits to new users.
The platform supports a range of models and offers APIs suitable for developers building AI applications.
- AI chatbots
- AI agents
- coding assistants
- text generation
- Open-source LLM applications
- Model experiment
Best for: Developers who want to test high-performance AI inference with starter credits.
17. Cloudflare Workers AI
Cloudflare Workers AI allows developers to run supported AI models using Cloudflare’s serverless GPU infrastructure.
It is available on Cloudflare’s Free and Paid Workers plans.
As of August 2026, Cloudflare provides a free allocation of 10,000 Neurons per day for Workers AI. Usage above the free allocation requires the Workers Paid plan, and some models have additional requirements.
Why use Cloudflare Workers AI?
It is particularly useful if your application already runs on Cloudflare.
You can combine AI inference with:
- Cloudflare Workers
- Pages
- AI Gateway
- vectorize
- Cloudflare’s global network
Best for: Developers building serverless and edge AI applications.
18. Replicate
Replicate makes it easy to run machine learning models through APIs without managing the underlying infrastructure.
The platform hosts thousands of public models covering areas such as:
- text generation
- Image generation
- Videos
- audio
- Speech
- Image processing
- computer vision
Replicate currently uses a pay-as-you-go pricing model, and pricing varies depending on the model and underlying hardware.
Because of that, Replicate should be viewed primarily as an AI model API platform, rather than a permanently free API provider.
Best for: Developers who need access to image, video, audio and specialized AI models.
19. Cohere
Cohere provides APIs for language models, embeddings, retrieval and enterprise AI applications.
One useful feature for developers is Cohere’s Trial API key.
Cohere states that trial API calls are free, although the trial key is rate-limited and cannot be used for production or commercial purposes.
What can you build?
- AI search
- RAG applications
- Document Analysis
- text generation
- Embedding systems
- Enterprise AI applications
Best for: Developers experimenting with RAG, search and enterprise AI.
20. AI21 Labs
AI21 Labs provides APIs and SDKs for generative AI and language models.
New AI21 accounts currently receive a $10 free credit valid for three months on the AI21 platform. The credit can be used for API, SDK and Playground usage.
Once the free credit expires or is consumed, valid billing information is required to continue using the platform.
- text generation
- Language applications
- AI assistants
- Document processing
- developer experimentation
Best for: Developers who want to experiment with language-focused AI APIs.
21. TabiAI
TabiAI is an another AI api key provider that you can use to access antrophic’s top AI models like Claude Opus 5 and Claude Opus 5 thinking. On the first signup you will get $100 free credit which you can use without any hourly and daily limit.
22. Justworker
JustWorker is a new AI api provider that provides API for top AI models like Claude Opus 5 for free with the initial credit limit of $75 on new signup with github account and also provides additional $20 on every referral so in this way you can use it for unlimited time without any limits.
23. B AI
B.ai is a poppular AI API provder which provides API keys for multiple popular AI modles like GLM 5.3 Flash, Qwen 3.8 Flash, Kimi K3, and more.
How to Get a Free AI API Key
The exact process depends on the platform, but most providers follow a similar process.
Step 1: Choose a provider
Select an AI API provider based on the model and functionality you need.
Step 2: Create an account
Register on the provider’s official website.
Step 3: Open the API dashboard
Look for options such as:
- API Keys
- developer
- Credentials
- API Access
- Settings
- Step 4: Generate your API key
Create a new API key and copy it.
Some platforms only display the complete key once, so store it securely.
Step 5: Add the key to your application
For example:
AI_API_KEY=your_api_key_here
Your backend can then use this environment variable when making requests.
How to Keep Your AI API Key Safe
Your API key should be treated like a password.
Never publish your API key in:
- GitHub repositories
- Frontend JavaScript
- Public websites
- Screenshots
- youtube videos
- Discord servers
- Telegram groups
- Public documentation
Instead, store the key in an environment variable or a secrets manager.
For example:
OPENROUTER_API_KEY=your_secret_key
Then use the key from your backend.
Don’t Put AI API Keys in Frontend Code
This is especially important for web applications.
Avoid:
Browser → AI Provider
Instead, use:
Browser → Your Backend → AI Provider
This keeps the API key on your server instead of exposing it to every visitor.
Frequently Asked Questions
What is the best website to get a free AI API key?
There isn’t one provider that is best for everyone. OpenRouter is one of the strongest choices if you want access to multiple AI models through a single API, while Google Gemini, Groq, SambaNova and Cerebras are useful when you want direct access to specific AI inference platforms.
Which AI APIs are free?
Several platforms currently offer some form of free access, including OpenRouter’s free models, Google Gemini’s Free Tier, Groq’s Free tier, Hugging Face’s free monthly inference credits, Cerebras’ free trial credits, Cloudflare Workers AI’s daily free allocation, Cohere’s trial API and AI21’s trial credits. The exact limits may change.
Can I get an AI API key without a credit card?
Some providers allow this, but requirements vary. For example, Groq’s Free tier has been documented as requiring no credit card, while OrcaRouter currently advertises signup without a credit card. Other providers may require payment verification or billing information for higher limits.
Which free AI API is best for coding?
The best option depends on the model you want to use. OpenRouter is useful for testing multiple coding models, while Groq and Cerebras can be attractive when response speed is important.
Which free AI API is best for AI agents?
OpenRouter, Groq, NVIDIA Build and other OpenAI-compatible providers can be useful for AI agents. Your choice should depend on tool-calling support, context length, model quality, rate limits and reliability.
Is Ollama a free API provider?
Ollama is different from hosted API providers. It primarily lets you run AI models locally and exposes a local API for programmatic access. This means you can run supported models without paying a per-request cloud API fee, although you still need suitable hardware for local inference.
Can I use OpenRouter for free?
Yes. OpenRouter provides free model variants and an openrouter/free router that selects from available free models. Free models have rate limits and availability can change.
Is Google Gemini API free?
Google currently provides a Free Tier for the Gemini API with access to selected models and free input/output tokens within the applicable limits. Higher usage and some advanced features require paid billing.
Are free AI APIs unlimited?
No. Almost every free AI API has some type of restriction, such as requests per minute, tokens per minute, daily requests, monthly credits, model restrictions or trial expiration.
Can I use free AI APIs in my SaaS?
Potentially, but you must check the provider’s terms. Some free or trial API keys are specifically intended for development and testing and may prohibit commercial or production usage.
Final Verdict
The availability of free AI APIs has made it significantly easier for developers to experiment with artificial intelligence without spending a large amount of money.
If you want one API for many models, start with OpenRouter.
If you care about very fast inference, look at Groq or Cerebras.
If you want open-source models, Hugging Face is an excellent starting point.
If you want Google’s Gemini models, use the Gemini API through Google AI Studio.
If you want to run AI completely locally, Ollama is worth considering.
For serverless AI applications, Cloudflare Workers AI is an interesting option, while Replicate is useful for experimenting with image, video, audio and other specialized models.
The most important thing to remember is that “free” does not necessarily mean unlimited. Free tiers, credits, model availability and rate limits can change, so always verify the current provider documentation before building a production application around a free API.
For developers, the best strategy is often to experiment with several providers, compare their model quality and latency, and then choose the API—or combination of APIs—that best fits the application.