count tokens used in chain

[hwchase17]

should be doable with callbacks

[dheerajiiitv]

@hwchase17 , is this related to calculating token_usage in chain?

[cyberandy]

Yes, it would be idea to calculate token_usage for every chain/agent and add it to the output.

[Mehuldobriyal123]

It should be doable with callbacks to the output

[hwchase17]

done! https://langchain.readthedocs.io/en/latest/modules/llms/examples/token_usage_tracking.html