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?