24 Free LLM APIs Compared in 2026 (Groq, Gemini, Cerebras)

Finding the best free LLM APIs in 2026 is harder than it looks. Dozens of providers advertise a free tier, but they fall into two very different groups, and telling them apart before you build is the difference between a hobby project that keeps running and one that dies the moment your trial credit runs out. This is a practical comparison of the free LLM API landscape, with an honest note on which options actually stay free.

We run 24 providers behind one gateway at DreamPrompting, so we have a clear view of what holds up in production and what does not. Here is the short version before the details.

The two categories of free LLM API

Every free LLM API belongs to one of two buckets, and this distinction matters more than any single benchmark:

• Permanent free tiers. No credit card required, and they stay free indefinitely (subject to rate limits). Groq, Google AI Studio (Gemini), Cerebras, Cohere, NVIDIA NIM, GitHub Models, Cloudflare Workers AI, Mistral, Hugging Face, and OpenRouter live here. These are the reliable backbone.
• Free trial credits. A small one-time balance that runs out, after which you must add billing. SambaNova, Hyperbolic, Fireworks, Nebius, Novita, Together, DeepInfra, Scaleway, AI21, and Upstage sit here. Great for a burst of testing, but they wall quickly.

If you want something that keeps working without a payment method, you want a permanent free tier. If you just need a big model for an afternoon of experiments, the trial-credit providers are generous while they last.

The best free LLM APIs compared

The live, current set is always visible at /models and at the GET /api/v1/models endpoint, since availability shifts as providers change their policies.

The tradeoffs that matter

• Speed. Groq and Cerebras are the standouts for raw tokens per second. If latency matters, start there.
• Model quality. Gemini and the larger Llama variants give you the strongest answers on a free LLM API.
• Rate limits. Permanent free tiers cap requests per minute and per day. OpenRouter free models in particular can get congested at busy times.
• Longevity. Trial-credit providers feel unlimited on day one and then stop cold. Do not build anything durable on them alone.

Use every free LLM API through one endpoint

Managing 24 keys, 24 rate limits, and 24 different SLAs is the real pain. DreamPrompting puts all of these behind one OpenAI-compatible endpoint with automatic failover. Send "model": "auto" and it routes to a healthy provider, falling back when one is congested or out of credit. One free key covers all of them: sign in with Google at /account, no credit card, then send it as Authorization: Bearer YOUR_API_KEY. Limits are 100 requests per minute plus a rolling 24 hour account quota of 5,000 requests and 500,000 tokens.

curl https://dreamprompting.com/api/v1/chat/completions \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "auto",
    "messages": [{"role": "user", "content": "Explain free LLM APIs in one line."}]
  }'

Because it is OpenAI-compatible, the official SDK works with a swapped base URL:

from openai import OpenAI

client = OpenAI(
    base_url="https://dreamprompting.com/api/v1",
    api_key="YOUR_API_KEY",
)

resp = client.chat.completions.create(
    model="auto",
    messages=[{"role": "user", "content": "Compare Groq and Gemini in one sentence."}],
)
print(resp.choices[0].message.content)

Streaming works too with "stream": true. There is also a keyless always-on fallback (ch.at) so requests still return something even when every upstream is busy. Full setup lives in the API docs, and you can try it in the browser at the chat playground.

FAQ

Which free LLM API is best? For most people Groq is the best default because it is fast and permanently free, with Gemini close behind for quality. The honest answer is that the best free LLM API depends on your priority: speed (Groq, Cerebras), quality (Gemini), or breadth (Hugging Face, OpenRouter).

Do trial-credit providers stay free? No. SambaNova, Fireworks, Together, and the others in that group give you a one-time balance and then require billing. Use them for evaluation, not for anything you need to keep running.

Do I need 24 API keys? No. That is the point of the gateway. One free DreamPrompting key and one endpoint with "model": "auto" cover all of them with failover, so you never manage 24 provider keys or hit a dead end.

Ready to build? Browse the live providers at /models and grab the quickstart in the API docs.

The best free LLM API alternative

If you are searching for a free LLM API alternative, whether that is an alternative to the paid OpenAI API, an alternative to a single-provider free tier, or an alternative to a free-LLM aggregator, the practical answer is a gateway that unifies many free tiers behind one OpenAI-compatible endpoint. DreamPrompting is a free ChatGPT API alternative and a drop-in alternative to managing many provider keys yourself.

• Alternative to the paid OpenAI API: keep your OpenAI SDK code, change the base_url, pay nothing.
• Alternative to a single free tier: when Groq or Gemini is rate-limited, automatic failover keeps you running.
• Alternative to juggling keys: one endpoint and one free key, covering every provider in the table above.

See the full list of free models, read the dedicated free ChatGPT API alternative guide, or compare us as a freellmapi alternative.