freellmpool › guide

Free alternatives to the OpenAI API

Many providers offer recurring free routes, keyless endpoints, or limited trial access — but those categories are not interchangeable. Groq, NVIDIA, Google Gemini, OpenRouter, Cloudflare, Mistral, Cohere, and others each have their own eligibility, SDK, and limits; Cerebras now offers finite trial credit rather than recurring free capacity. freellmpool pools eligible enabled routes behind one OpenAI-compatible endpoint with automatic failover and can start without a provider key when a keyless route is available.

pip install freellmpool
export OPENAI_BASE_URL=http://localhost:8080/v1   # after: freellmpool proxy
# your existing OpenAI SDK code now runs on free models, unchanged

The options, honestly

Option	Free?	API key?	OpenAI-compatible
Provider free tiers and trials	Varies by provider, account, and route	Usually yes	Mostly
freellmpool (pools eligible routes)	Open source; upstream limits still apply	Not when a keyless route is available	Yes (drop-in)
OpenRouter	A few rate-limited free models	Yes	Yes
Local models (Ollama, llama.cpp)	Yes (your hardware)	No key	Via a wrapper

Why pool the free tiers instead of picking one

• Pooling several eligible routes can provide more resilience and aggregate capacity than relying on one.
• freellmpool fails over when one provider is rate-limited, so you're not stuck on a 429.
• Your code keeps using the OpenAI SDK — only the base URL changes.
• It also has an experimental Anthropic-compatible path, so Claude Code / Codex / Aider run on free models too — see the coding-agents guide.

Limits to know

Free-tier models are smaller than GPT-class frontier models — great for drafting, classification, summarization, and everyday coding, not the hardest reasoning. Upstream reset windows and allowance types vary by provider; freellmpool's local daily counters roll over at UTC midnight.

FAQ

Is there a free OpenAI API key?

OpenAI itself doesn't offer a free API tier, but several other providers do, and freellmpool lets you use eligible routes through the same OpenAI-compatible interface. Pollinations, OVHcloud, and Kilo Gateway have enabled keyless routes, so pip install freellmpool && freellmpool ask "..." can work immediately when one of those routes is available.

Can I keep my existing OpenAI code?

Yes. Point OPENAI_BASE_URL at the local freellmpool proxy; the SDK calls are unchanged and common model names like gpt-4o-mini are mapped to a free equivalent.

Part of freellmpool (MIT, free, open source). Updated 2026-08-29.