o1-preview gave me this...
Final Decrypted Message:
"Por ejemplo te agradeceré, y te doy ejemplo de que lo que lees es mi ejemplo"
English Translation:
"For example, I will thank you, and I give you an example of what you read is my example."
... initially it gave up and asked if I knew what type of cypher had been used. I said I thought it was a simple substitution.
Why did it add the accents on to e (é)? Surely that wasn't part of it and it actually "thought a bit too far"?