AI Credits Inside Developer Programs: A 2026 Playbook for Free Tokens via NVIDIA, AWS, Microsoft, and Mistral Developer Tracks

No student ID, no referral farming — just developer-program membership. This playbook breaks down NVIDIA Developer Program, AWS Activate, Microsoft for Startups Founders Hub, and the Mistral developer track: real 2026 entry points, eligibility, review criteria, credit formats (trial credits / inference credits / model vouchers), and the usual rejection reasons.