Most active fusion projects (ITER, Helion, Lockheed, LPP, TAE) have not put out anything promising in the last few years, so short/medium term progress still rests on molten salt fission, eg Terrestrial Energy is building a 190MW MSR for <$1B USD (video).

Update: Transatomic (MIT backed startup that raised $4M to build an MSR variant) has folded and will open source its IP. This is less an indictment on the viability of MSR's and more one on their overly ambitious design, which (in 2012) claimed would generate >100% more power than a traditional reactor using nuclear waste as fuel. It was debunked by the community quite early; reality has since caught up with them.

NB: some question why there is such a strong emphasis on molten salt in modern energy generation designs. The simple answer: intrinsic safety. They are a very efficient heat transfer media (like water) but with a higher boiling point - depending on mixture, somewhere between 200 and 800°C - so they don't carry the same risk of pressure (steam) driven explosion. They're also completely immune to radiation damage.