It seems to be extremely economical - 4x better reasoning efficiency compared to Opus while being priced at $2/$6. For comparison, GPT 5.4 is $2.5/$15, GPT 5.5/5.6 are $5/$30, Opus 4.8 is $5/$25, Fable is $10/$50. And by benchmarks (unless they gamed them), seems to be at around Opus 4.7 level, which is what Elon mentioned in https://x.com/elonmusk/status/2074911038286295049 . I guess the Cursor data was very useful.
The $2/6 pricing seems to only apply for context under 200K. Above that (max context is 500K) pricing doubles to $4/12. https://docs.x.ai/developers/models/grok-4.5
No longer feels as inexpensive. Will likely just include this in the rolodex of <200k context tasks, like being one of my review agents.