Grok 4.5 is free in Cursor right now and I don't think most people have noticed.No API key or card needed, it's just a toggle in Settings → Models.The part that caught my attention isn't the benchmarks (83.3% terminal-bench, 64.7% SWE-bench Pro, 500K context). It's that it uses 4x fewer tokens than Opus 4.8 on coding tasks. Opus output bills at $20/M in the same editor.Not saying it replaces anything yet. But when a frontier model is free, running it next to whatever you're paying for seems like