Best Free AI APIs for OpenClaw
Run your AI assistant without paying for API calls. These providers offer generous free tiers that work great with OpenClaw.
Why Use a Free AI API?
- Test OpenClaw without spending anything
- Run a personal assistant for light daily use at zero cost
- Combine with a free Oracle Cloud VPS for a completely free setup
- Try different models before committing to a paid plan
- Keep costs at zero for hobby projects and experiments
Detailed Comparison
Free trial: 7-day full access. GPT-4o, Claude, Gemini, and more - no API keys needed.
- No API key setup required
- All major models in one place
- Managed hosting included
- 7-day free trial to test everything
- Switch models with one click
- Paid after trial ($39/mo Pro plan)
- Not a permanent free tier
Our verdict: If you want to try OpenClaw without any setup, start here. No API keys, no server, no config. Everything works out of the box.
Free tier: 500 RPD (Gemini 2.5 Flash), 25 RPD (Gemini 2.5 Pro), 1M token context
- Most generous free limits
- Top-tier model quality
- Vision, tool use, and code all included
- 1M token context window
- Fast response times
- Rate limits can be strict at peak times
- Free tier data may be used for training
- Region restrictions in some countries
Our verdict: Best free API for OpenClaw. Gemini 2.5 Flash handles most tasks and 500 RPD is enough for a personal assistant.
Free tier: Multiple free models including DeepSeek, Llama, Qwen. 20 RPM shared limit. $0 cost models available.
- Access to many free models in one API
- OpenAI-compatible API format
- Easy model switching
- No credit card required
- Free models change frequently
- Shared rate limits can be tight
- Slower during peak hours
Our verdict: Great for experimenting with different models. The unified API makes it easy to switch between free options.
Free tier: 6,000 tokens/min on Llama 3.3 70B. Multiple open-source models. LPU inference hardware.
- Extremely fast inference (LPU chips)
- Llama 3.3 70B is very capable
- Simple API, easy setup
- No credit card needed
- Token-per-minute limits hit fast
- No vision support on free models
- Limited model selection vs OpenRouter
Our verdict: Best for speed. If you want instant responses and Llama 3.3 70B is good enough for your tasks, Groq is excellent.
Free tier: Experimental API access with rate limits. Includes Mistral Small, Codestral for code, and Pixtral for vision.
- Strong coding model (Codestral)
- Vision support with Pixtral
- EU data residency
- Good for multilingual tasks
- Free tier limits not clearly documented
- Experimental access can change
- Smaller model ecosystem
Our verdict: Good option if you need coding help or EU data residency. Codestral is excellent for programming tasks.
Free tier: Trial API key with rate limits. Command R for general use, Command R+ for complex reasoning. Strong RAG support.
- Built-in RAG and web search
- Good at following instructions
- 128K context window
- Strong multilingual support
- Trial tier is time-limited
- Not as capable as Gemini or GPT-4
- Smaller community
Our verdict: Good for research and RAG workflows. Trial tier is generous but check if it expires.
Free tier: Rate-limited access to Llama models on Cerebras wafer-scale chips. Extremely fast token generation.
- Fastest inference available (wafer-scale)
- ~2,000 tokens/sec generation speed
- OpenAI-compatible API
- Very limited free tier
- Only Llama models
- Waitlist may apply
Our verdict: If speed is everything and you are fine with Llama models, Cerebras is worth trying.
Quick Comparison
| Provider | Best Model | Free Limit | Speed | Best For |
|---|---|---|---|---|
| Ampere.sh | All models | 7-day trial | Fast | Zero setup |
| Google Gemini | Gemini 2.5 Flash | 500 RPD | Fast | General use |
| OpenRouter | Varies (DeepSeek, Llama) | 20 RPM | Varies | Model variety |
| Groq | Llama 3.3 70B | 6K tokens/min | Very fast | Speed |
| Mistral | Mistral Small | Rate limited | Fast | Coding, EU |
| Cohere | Command R+ | Trial limit | Moderate | RAG, search |
| Cerebras | Llama 3.3 70B | Rate limited | Ultra fast | Raw speed |
How to Connect a Free API to OpenClaw
Setting up a free API takes about 2 minutes:
- Sign up at your chosen provider (no credit card needed for most)
- Generate an API key from their dashboard
- Add the API key to your OpenClaw config
- Set the model name in your model config
- Start chatting
For Gemini specifically, visit Google AI Studio, generate a key, and add it to your OpenClaw environment. That is it.
The Bottom Line
If you want the easiest start, Ampere.sh gives you a 7-day free trial with all models included - no API keys, no server setup, no config files. Everything just works.
For a permanent free API, Google Gemini is the best. Gemini 2.5 Flash gives you 500 free requests per day - more than enough for a personal assistant. If you want variety, OpenRouter lets you try dozens of free models. If you care about speed, Groq is unmatched.
For the best model recommendations (free and paid), check our AI model guide. To keep costs low even on paid APIs, see how to reduce API costs.
Free vs Paid APIs
| Factor | Free Tier | Paid API | Ampere.sh |
|---|---|---|---|
| Cost | $0 | $0.01-0.10 per message | Free trial, then $39/mo |
| Rate limits | Strict (RPM/RPD caps) | High or none | Plan-based credits |
| Model quality | Good (Gemini Flash, Llama) | Best (GPT-4o, Claude, Gemini Pro) | All models included |
| Reliability | May throttle at peak | Consistent | Managed, monitored |
| Support | Community only | Provider support | Priority support |
Free APIs are perfect for personal use. If you run a business or need guaranteed uptime, a paid API or managed hosting is a better fit. See our total cost breakdown for the full picture.
The Completely Free Stack
Want to run OpenClaw at absolutely zero cost? Here is the stack:
- Server: Oracle Cloud free tier - always-free ARM VPS
- AI API: Google Gemini free tier - 500 RPD
- Setup: Beginner setup guide
- Channel: Telegram or Discord (both free)
Total cost: $0/month. Your AI assistant runs 24/7 on Oracle's free VPS, powered by Gemini's free API, accessible through Telegram or Discord.
Alternative: Run Your Own LLM
If you have a powerful GPU or a Mac with 16GB+ RAM, you can skip APIs entirely and self-host a local LLM. Models like Llama 3.3 and Qwen 2.5 run well locally. Zero API costs, zero rate limits, complete privacy.
For Mac users, see our guides for Mac Mini and Mac M4 setups.
Frequently Asked Questions
Can I run OpenClaw completely for free?
Which free AI API is best for OpenClaw?
What are the limits of free AI APIs?
Can I use multiple free APIs together?
Is the free tier good enough for daily use?
Do free APIs work with all OpenClaw features?
What happens when I hit the free tier limit?
Also Read
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