🟢 xAI OAuth Onboarding Use any active xAI account — X Premium, X Premium+, SuperGrok, or SuperGrok Heavy — for , , and multi-agent models. No separate API key needed. This is standard OAuth 2.0 (RFC 8628 Device Authorization Grant), not a vendor-custom flow. Tier → model access The JWT issued by carries a claim; higher tiers unlock more models from . Observed mapping (xAI does not publish this officially): | Tier | Subscription | Approx. model access | |---|---|---| | 1 | X Premium ($8/mo) | grok-4.3 baseline | | 2 | X Premium+ ($16/mo) | + grok-4.20-0309 variants | | 3 | SuperGrok ($30/mo)…