Guidance on which grant / flow to use for OpenID Connect

Many people seem to ask for the guidance on which grant / flow to use in OpenID Connect.

Here is my straw-man answer.

Conditions / Requirement code grant implicit grant hybrid grant
Server is not directly reachable from the client x
Want less round trip x x
Do not want to reveal tokens for better security x (some)
Want client authentication x x
Want refresh token x x
Slow front channel, fast back channel x x


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