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AI and LLM APIs: which free tiers are still free?

Free tier status of 5 AI model and LLM APIs, read from each vendor's public page on 2026-10-05. Status counts: 1 free, 4 free with limits.

Tool	Still free?	Summary	Checked
Cloudflare Workers AI	Yes	The free allocation is 10,000 Neurons per day at no charge, on both the Workers Free and Workers Paid plans.	2026-10-05
Cohere API	Yes, with limits	Evaluation API keys are free but limited to 1,000 API calls per month and 20 Chat requests per minute.	2026-10-05
Google Gemini API	Yes, with limits	The Gemini API has a free tier where several Flash and Flash-Lite models are free of charge under rate limits, and free-tier content is used to improve Google's products.	2026-10-05
OpenAI API	Yes, with limits	The rate limits guide lists a Free usage tier for users in an allowed geography, but it does not say which models or how much usage are free of charge.	2026-10-05
OpenRouter	Yes, with limits	Model variants whose ID ends in :free can be called at no cost, limited to 20 requests per minute and 50 requests per day until at least 10 credits have been purchased.	2026-10-05

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