In the US as of June 2024: Gas peaker plants are: $110-228 And Gas combined cycle: $45-108

PV in the US is also more expensive than globally however: $38-171 for Utility scale with storage, when including subsidies, $60-210 when not.

Coal is so much worse in every cost metric than gas combined cycle it's not worth considering, even leaving the pollution aside.

https://www.energy.gov/sites/default/files/2024-12/34-%20Exh...