I've used 1% NTC with 1% 10k in this configuration and by using manufacturer given 3380K for this part
NTCM-HP-10K-1% -55÷125°C; 50mW I;ve made look up table for MPU, so If I wanted I could read directly MPU ADC value and hadrcode in MPU to create desired logic and now I can forget about opamps, but using calculator shown above where I've checked experimantal data by making measurement of NTC resistance at known room temperature using another termometer, voltages thesholds could be estimated, to be able use comparator instead of MPU with ADC
More about this look up table method and link to this quite nice NTC calculator starting from here:
NTC Thermistor resistance (Li-Ion Charging) ...