A curated list of permanently free LLM APIs — with rate limits, OpenAI SDK compatibility, available SDKs, speed tiers, and free model lists. No trial credits. No time-limited promos. No credit card required.
ChatGPT
Unlimited gpt-oss api openai compatible
ChatGPT 5.6 Sol free desktop - Sol vs Terra vs Luna comparison built in. chatgpt 5.6 sol is OpenAI reasoning variant. Sol ultra, sol what's new, sol release date info in-app. chatgpt 5.6 sol vs terra vs luna benchmark. Free unlimited access, no Plus subscription. Download ChatGPT 5.6 Sol free on Windows, macOS and Linux.
Access the ChatGPT 5.6 AI model through a native and distraction-free desktop application for coding, writing, and problem-solving.
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