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.
Unlimited gpt-oss api openai compatible
ChatGPT 5.6 desktop app free access to OpenAI's latest model on Windows, macOS and Linux, no Plus subscription. Includes features from GPT-5.5 Codex and the full 5.6 release. Download the ChatGPT 5.6 client free no browser, no waitlist, conversation history and dark mode included.
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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