Actually, check out the actual words of Jesus to Nichodemus in John 3:16-19.

For God so loved the world that he gave his one and only Son, that whoever believes in him shall not perish but have eternal life. For God did not send his Son into the world to condemn the world, but to save the world through him. Whoever believes in him is not condemned, but whoever does not believe stands condemned already because they have not believed in the name of God's one and only Son.

All 25 major English translations agree on the word "only". http://biblehub.com/john/3-16.htm

This also makes it very clear that Jesus is claiming to be the only way - "Whoever does not believe stand's condemned already"

And, Jesus said, "I am the Way and the Truth and the Life, no one comes to the Father but by me."

In Matthew 16:17 it is pretty explicit:

Simon Peter answered, “You are the Christ, the Son of the living God.” Jesus replied, “Blessed are you, Simon son of Jonah! For this was not revealed to you by flesh and blood, but by My Father in heaven.

So I'm not sure where you are getting your information, but you ought to check your sources. :o)