For comparison, 5x the cost of Opus 4.6, and 1.67x for Opus 4.1

I think this would be very heavily used if they released it, completely unlike GPT 4.5

Opus 4 & 4.1 are still on Vertex+Bedrock @ $75/1mm out. They were used very heavily and in my subjective opinion are better than 4.5 and 4.6.