completion_cost_details is the per-sub-category sum of completion cost details across the thread. Populated when COMPLETION_COST_DETAILS is selected.
completion_token_details is the per-sub-category sum of completion token details across the thread. Populated when COMPLETION_TOKEN_DETAILS is selected.
prompt_cost_details is the per-sub-category sum of prompt cost details across the thread. Populated when PROMPT_COST_DETAILS is selected.
prompt_token_details is the per-sub-category sum of prompt token details across the thread. Populated when PROMPT_TOKEN_DETAILS is selected.
