[Bug]: Bedrock + Claude Code spend and requests tracked un UI and not reflected in Prometheus metrics

[njk8]

What happened?

Mismatch litellm UI vs prometheus metrics on litellm_spend_metric_total and also on litellm_request_total_latency_metric_count (total number of requests) when using bedrock models via claude code, while all other models & keys track correctly (like when suing curl requests).

• UI shows $3–4 of spend for that API key on the same day.

• Prometheus /metrics only shows very small values (e.g. 0.002), and increase(litellm_spend_metric_total[1d]) returns 0.

• This mismatch only happens for Bedrock model calls coming from Claude Code via litellm api key.

ENV
Litellm version = "0.1.815"
Prometheus callback enabled: Yes
Backend provider: AWS Bedrock

Prometheus scraping / Grafana queries are confirmed working correctly for other keys and models when not using claude code.

To reproduce:

1. Configure LiteLLM with Bedrock models + Prometheus callback.
2. Create a API key
3. Use Claude Code to send several requests to a Bedrock Claude model via LiteLLM.
4. LiteLLM UI for the 'key'($3.69) → Spend per day differs from Prometheus endpoint ($0.002) increase(litellm_spend_metric_total{api_key_alias="key"}[1d])
5. Repeat the same process and use a curl request and then the Promethus spend matches perfectly.
6. We can also observe that the total request counter is also having a mismatch when using bedrock models + claude code but matches perfectly when using a curl request.

Expected Behavior

For all models (including Bedrock Claude), spend should be counted identically in:
LiteLLM UI (DB-backed spend logs)
Prometheus metrics (litellm_spend_metric_total)

Impact

Grafana dashboards under-report cost for teams using Claude Code.

Please investigate whether:

Bedrock Claude requests triggered via Claude Code skip or partially skip Prometheus spend metric increments. Please let us know if you need any more information.

Relevant log output

Are you a ML Ops Team?

Yes

What LiteLLM version are you on ?

v0.1.815

Twitter / LinkedIn details

No response