It ended a run of two straight defeats and means Cobblers stay third in the table, with Carlisle United just one point back.
The supercomputer predicts it will be Cobblers v Carlisle for the final automatic promotion place.
Here is how the final League Two table will look, according to the supercomputer.
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1. Stevenage - 89pts (+30)
Win the league: 45%
Promotion chances: 85%
Play-off chances: 16% Photo: Pete Norton
2. Leyton Orient - 86pts (+26)
Win the league: 29%
Promotion chance: 80%
Play-offs: 21% Photo: Pete Norton
3. Northampton Town - 82pts (+25)
Promotion chances: 64%
Play-off chances: 36%
Win the league: 15% Photo: Pete Norton
4. Carlisle United - 77pts (+22)
Promotion chances: 41%
Play-off chances: 47% Photo: Chris Holloway