Caleb has a very high potential, combining together good basic speed (he won WJCh in 1500m in 2010) with high aerobic power (in the same 2010 he won also WJCCh in Bydgoszcz running 8 km).
However, he doesn't have the "kick" necessary for winning competitions of 1500m when the pace is medium (for example, 3'32"), that is what happens in every Championship.
For that reason, we decided to move to 5000m, already this year. The first plan was to run 5k in Kenyan Trials, but, looking at good workouts of speed endurance, at the end he decided to run 1500m, thinking to go in the Team (knowing Kenya could put 4 athletes). So, his goal was to defeat Birgen in Trials, and he succeeded, but for selectors it was not enough, considering Birgen had more consistency in the event, being a "total" specialist of the distance.
Caleb is very tall (1.86), such as Asbel Kiprop, but is a little bit heavier (66 kg). His problem, at the moment, is some lack of fluidity in his technical action. He is very strong in his legs, and for that reason is better than Asbel in Cross Country, especially when it's muddy, but runs with very long strides, with his shoulders a little bit ahead.
This technical particular doesn't allow him to lift his knees in the best way, and this is the main difference between him and Asbel.
Caleb has to work for becoming more relaxed while running. The relaxation during running is the best attitude of Mo Farah, who, under this point of view, is better than Asbel Kiprop, too.
Caleb is very motivated, and very serious not only in training, but also in his normal life. For those reason, I think he can become one of the top 3 athletes for 5000m in the next future, with the right time to build his mind and his physiology in order to last more.
For example, this year in a competition in Nakuru he ran on Friday the heats of 1500m in 3'41", and the next day his first 10000m, practically alone, in 28'38". After Golden Gala, when he ran 13'03" in his real first 5000m (he ran once in Japan in 2010, not really well prepared), he told me "now I know I can run very much faster", because in that occasion he feared to follow the pace of the leaders.
If I have to give some info about his speed, I think he can run 800m in something less than 1'47", may be 1'46" high.
His best event at the moment is 3000m.
Of course, with Gebrihwet and Alamirew he can be the main danger for Mo Farah in 5000m, in the next 3 years.