Here is the current "Free-Tier AI Stack" for 2026
1. The Frontier Giants • Gemini: Access 1.5B tokens/day on Gemini 1.5 Flash/Pro. That is an astronomical amount of context for RAG and long-document analysis. • OpenAI: Their “Data Sharing” program offers 250k/2.5M tokens daily. • xAI Grok: Spend just $5 and unlock $150/month in free credits. • Amazon AWS: New users get $100 credit for 6 months, providing access to 200+ models including Opus 4.7 and GPT 5.1. 2. Speed & Open-Source Powerhouses • Groq: The king of inference speed. Access Llama 3.3-70b and Qwen3-32b at speeds that feel like magic—completely free. • Mistral: Their Experimental Program offers a massive 1B free tokens per month. • Nvidia: Use the Nemotron suite via their developer playground for high-performance base models. 3. The Aggregators & Community Hubs • Hugging Face: The "GitHub of AI" provides a Free Serverless Inference API for thousands of models (Llama, Stable Diffusion, Whisper). No credit card required. • OpenRouter: Access 50+ models with unlimited usage tiers for experimentation. • Deepinfra: Get 1M tokens/day on Llama/Mistral models just for signing up with an email. 4. Specialized & Niche Access • Cohere: Their Trial API gives 1,000 calls/month for the best-in-class Rerank v3 and multilingual Aya models. • Lepton AI: $10 free credit on signup to test Llama and Gemma models in a streamlined playground. So, what are building today?