Fable-like intelligence, beats GPT-5.6-Sol on most benchmarks, cheaper than Kimi K3 on API and quite generous usage on Cursor subscription.
In my tests Grok 4.5 is definitely not Opus level. It is somewhere in between Sonnet and Opus, I'd say maybe a bit closer to Sonnet.
We'll see with 4.6.
I'm thinking of switching to Grok on Cursor (purely for $$ reasons). But Opus >= 4.8 has been fantastic; it's hard to leave, even just to dabble with other models.