According to SSB, the 75th percentile for full-time system architects in private industry (the highest paid software developer category) in Norway in 2017 was $103K/year. This is close to the 50th percentile for all software engineers in US in 2017, which was $104K according to BLS. The 50th percentile for system architects in Norway was $87K.
Norway has a higher cost of living due to the 25% VAT, and because the national (non-developer) median salary is so high. Not to mention vehicle and gasoline taxes.
Have you looked at the exchange rate to euros? That's 1M NOK. I think maybe you meant $, which would be 800K NOK, which sounds correct for Oslo.
Seriously here in Norway getting over 100K € annually is becoming normal. If you are really talented, then you can even make 150k € annually. Freelancers make over 200k € annually. There is a huge shortage for developers these days, much thanks to "digital transformation" trend.