Free AI Index / Guides

Free OpenAI API Alternatives — OpenAI-Compatible Free API Options | FreeLLM

Compare practical OpenAI API alternatives for prototypes and developer tools, with free access conditions and limits shown next to the official source.

Important: OpenAI's official API is not presented as permanently free on this page. The entries below are independent providers or OpenAI-compatible endpoints.
01 / verified paths

Verified options and their limits

Each row links to a FreeLLM record and an official provider source. Quotas, regions, account requirements and prices can change, so verify the provider page before relying on an offer.

Provider / modelWhat the current record saysNext step
Groqgpt-oss-120b / gpt-oss-20b · qwen3.x-27b · groq/compound · llama-prompt-guard · whisper-large-v3 OpenAI-compatible API with per-model RPM, RPD and TPM limits. Official source ↗
FreeLLM record ↗
CerebrasAll Cerebras-powered hosted models while free credits last $5 free credits after account creation; current terms belong to the official pricing page. Official source ↗
FreeLLM record ↗
Hugging Face Inference ProvidersOpen models served via multi-provider inference (chat, embeddings, image and more) Free tier included; monthly credits and provider availability can change. Official source ↗
FreeLLM record ↗
SiliconFlowPaddleOCR-VL-1.5 · Hunyuan-MT-7B · BAAI bge-m3 / bge-reranker-v2-m3 / bge-large · Kwai-Kolors (¥0 listed) Selected models may be listed at ¥0; login, region and model limits vary. Official source ↗
FreeLLM record ↗
ModelScopeHosted open models (LLM · MLLM · text-to-image) marked with the API-Inference badge Registered users can access API-Inference with dynamic rate limits. Official source ↗
FreeLLM record ↗
LongCat APILongCat-2.0 OpenAI-compatible endpoint is documented; a permanent free quota is not confirmed. Official source ↗
FreeLLM record ↗
02 / setup

Quick start with an OpenAI-compatible SDK

Most compatible providers use the OpenAI SDK shape. Replace the base URL and API key, then use the model ID listed in the provider documentation.

from openai import OpenAI

client = OpenAI(
    base_url="https://api.groq.com/openai/v1",
    api_key="YOUR_PROVIDER_KEY",
)

response = client.chat.completions.create(
    model="openai/gpt-oss-20b",
    messages=[{"role": "user", "content": "Hello"}],
)

Do not copy a model ID or quota from a different provider. The official source link in each row is the authority.

03 / related pages

Continue exploring