I plotted the IV curve for a 1N4148 diode and obtained this. The simulation shows about 60 mA of current at 0.8 V while the datasheet shows about 30 mA. I also checked this datasheet and it also shows 30 mA. In real life I measure 26.4 mA at 0.8 volts.
Considering this is supposed to be a model of that actual diode, the result seems rather far off.
Considering this is supposed to be a model of that actual diode, the result seems rather far off.