This doesn’t suggest that Tesla will continue at a pace of 5,000 Model 3s per week though. Special circumstances existed to make this achievement possible.
Word has it that it was all hands on deck to make this possible. Additional employees were called in, called back, transferred to the factory from the headquarters, pulled in from SolarCity and so on. Basically, Tesla pushed itself to its very limit to achieve this feat, so don’t expect it to be repeated in the next 7 days too.