API Reference

Runs

Usage

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Retrieve Run Usage

get/v1/runs/{run_id}/usage

Get usage statistics for a run.

Path ParametersExpand Collapse

run_id: string

ReturnsExpand Collapse

completion_tokens: optional number

completion_tokens_details: optional object { reasoning_tokens }

reasoning_tokens: optional number

prompt_tokens: optional number

prompt_tokens_details: optional object { cached_tokens }

cached_tokens: optional number

total_tokens: optional number

Retrieve Run Usage

HTTP

• HTTP
• TypeScript
• Python

curl https://api.letta.com/v1/runs/$RUN_ID/usage \
    -H "Authorization: Bearer $LETTA_API_KEY"

200 example

{
  "completion_tokens": 0,
  "completion_tokens_details": {
    "reasoning_tokens": 0
  },
  "prompt_tokens": 0,
  "prompt_tokens_details": {
    "cached_tokens": 0
  },
  "total_tokens": 0
}

Returns Examples

200 example

{
  "completion_tokens": 0,
  "completion_tokens_details": {
    "reasoning_tokens": 0
  },
  "prompt_tokens": 0,
  "prompt_tokens_details": {
    "cached_tokens": 0
  },
  "total_tokens": 0
}