Looks less "intelligent" to me, just a lot more trained on agentic (multi-turn tool) use so it greatly outperforms the others on the benches where that helps while lagging elsewhere. They also released bigger models, where "Pro" is supposedly competitive with 4.5 Sonnet. Lite is priced the same as 2.5 Flash, Pro as GPT 5.1. We'll definitely do some comparative testing on Nova 2 Lite vs 2.5 Flash, but not expecting much.