Get Free API Keys for Popular AI Models in 2026 (Claude, OpenAI, Gemini & More)

If you’re building AI apps, testing agents, or just experimenting with different models, constantly paying for API credits can get expensive fast. The good news: there are several platforms that give you free or low-cost API keys to a wide range of models, including OpenAI, Claude, Gemini, Qwen, Llama, and more.

This guide walks you through the main sites to know, how to get your API keys, and what you can do with them.

Nvidia Build: Playground for Multiple AI Models

Nvidia’s AI platform at build.nvidia.com is a great starting point if you want to try many different models in one place.

After signing up or logging in (email or Google), you’ll get access to a playground where you can interact with a variety of models for text, coding, and more. You’ll see options like Gemma 4, Kimi, Neumotron, MiniMax, and many others. Both free and premium models are listed, and you can browse even more by clicking on the “More models” section.

From the playground, you can also access API options. Once you select a model, Nvidia provides an interface to call that model via API, so you can integrate it into your own tools, scripts, or apps.

Dialergram (Nexum Router): Free Qwen LLM API Keys

dialergram.me (also referred to as Nexum Router) focuses on providing free API access to the Qwen family of models, developed by Alibaba Cloud. These models—especially the Qwen 3.5 and 3.6 series—are strong choices for coding and development tasks.

Once you create an account and land on the dashboard, you can:

1. Go to the API key section.

2. Give your key a name.

3. Click “Generate” to create a free API token.

You can then copy this key and use it in any compatible client or code environment to call Qwen models, making it a handy option if you’re looking for a capable coding-focused LLM at no cost.

Groq: Fast Inference and a Unified Playground

groq.com offers a powerful playground and developer console that supports a wide range of models through a single interface. It’s designed for speed and scale, with millions of developers already using the platform.

After logging in with your Google account, you’ll see a playground where you can interact with different models. To get an API key:

1. Go to console.groq.com.

2. Open the API keys section.

3. Click Create API key, give it a name, and generate it.

Once created, copy the key to your clipboard and plug it into your apps or scripts. Groq supports many popular models, including Qwen, Llama, Meta models, OpenAI-compatible models, and even Whisper for speech-to-text.

For each model, Groq typically provides example code snippets (often in Python) showing exactly how to call the API, which makes it easy to get started even if you’re new to AI APIs.

If you’re interested in keeping up with the latest high-performance models and how they compare, you may also like our roundup in AI Weekly: Claude Mythos Shockwave, New Open-Source Coding Beast, and the Best Video Model You Can Actually Use.

Ollama Cloud: API Keys for Local and Cloud Models

ollama.com is best known for running models locally on your machine, but it also offers cloud capabilities and API keys through its web interface.

After you sign up and log in to the web dashboard, look for the Keys or API section in the sidebar. From there you can:

1. Create a new API key by giving it a name.

2. Generate the key and copy it to your clipboard.

These API keys can be used to access cloud-hosted models and extra features like web search. Ollama also tracks your usage, with limits that reset over time (for example, session usage resetting every 12 minutes and weekly usage resetting after a few days). As long as you stay within those limits, you can keep experimenting without extra cost.

Ollama supports a wide range of models, so once your setup is complete you can switch between them using the same API.

GitHub Models Marketplace: One Key for Many Models

GitHub’s AI model marketplace at github.com/marketplace/models gives you a unified way to access multiple models with a single API key and centralized billing.

On this site you can:

1. Browse a catalog of models (including OpenAI’s ChatGPT and others) using the “View all models” option.

2. Open a model’s detail page to see its capabilities and try it directly in a chat-style playground.

3. Set up your account and generate an API key from the Apps or account section.

GitHub highlights that you get a single API key for all models and that it’s free to start. You won’t be charged until you hit their rate or usage limits, which makes it a good way to test multiple providers from one place instead of juggling separate accounts.

This is especially useful if you’re already building on GitHub and want to integrate AI into your existing workflows, automation, or CI/CD pipelines.

OpenRouter: Unified Access to Major AI Models

openrouter.ai is another powerful option if you want to call many different AI models through a single, consistent API. It supports a wide range of providers and models, including major names like OpenAI, Anthropic (Claude), and others.

To get started:

1. Log in with your Google account.

2. Go to your Profile and then the Credits or API Keys section.

3. Click Create API key, give it a name, and generate it.

New users typically receive some free credits. When your balance reaches zero, you can top up by adding payment details and purchasing more credits. The key benefit is that you only need this one API key to access a large catalog of models through a unified interface.

OpenRouter is ideal if you want to compare different models for the same task (for example, testing Claude vs. OpenAI vs. Qwen for coding or content generation) without rewriting your integration each time.

Choosing the Right Platform for You

All of these platforms help you get free or low-cost access to powerful AI models, but they each shine in slightly different areas:

Nvidia Build – Great for experimenting with a curated set of models in a polished playground, especially if you’re already in the Nvidia ecosystem.

Dialergram (Nexum Router) – Best if you specifically want free API access to Qwen models for coding and development.

Groq – Strong choice if you care about speed and want clear code examples for many popular models.

Ollama – Ideal if you like running models locally but also want cloud APIs and usage tracking.

GitHub Models – Convenient if you live in GitHub already and want one key for many models with free-to-start usage.

OpenRouter – Perfect if your goal is to access almost all major models through a single, unified API and easily switch between them.

If your projects extend into AI video or multimodal content, you might also find it useful to explore tools that pair well with these APIs, like the setups described in How to Run LTX 2.3 for Free: Unlimited Local Text‑to‑Video on a Cloud GPU.

Whichever platform you start with, the key advantage is the same: you can test, prototype, and build with top-tier AI models without committing to heavy upfront costs.