"None of them are terribly palatable but we're doing our best to try and resolve what is a quite broken company."
Key expected State Owned Enterprises Minister Tony Ryall and Finance Minister Bill English would have "clarity" about the next steps within a month.
The indebted state-owned enterprise announced more than 100 job cuts earlier this month and English said the Government was prepared to let the company fail if it could not come up with a viable turnaround plan.
Chairman Mark Ford says he has "total confidence" Solid Energy's s revamped business plan would be acceptable to the Government and banks.
Asked if Ford's plan was viable, Key yesterday said he hadn't seen it.
"If it is that would be great. That's not the advice we've had just yet."