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chore(closes OPEN-8441): tokens not captured for Bedrock traced via t… #562

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Merged
whoseoyster merged 1 commit into from
Dec 12, 2025
Merged

chore(closes OPEN-8441): tokens not captured for Bedrock traced via t… #562

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13 changes: 12 additions & 1 deletion src/openlayer/lib/integrations/langchain_callback.py
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Original file line number Diff line number Diff line change
Expand Up @@ -29,6 +29,7 @@
"openai-chat": "OpenAI",
"chat-ollama": "Ollama",
"vertexai": "Google",
"amazon_bedrock_converse_chat": "Bedrock",
}


Expand Down Expand Up @@ -398,7 +399,8 @@ def _extract_token_info(

# Fallback to generation info for providers like Ollama/Google
if not token_usage and response.generations:
generation_info = response.generations[0][0].generation_info or {}
gen = response.generations[0][0]
generation_info = gen.generation_info or {}

# Ollama style
if "prompt_eval_count" in generation_info:
Expand All @@ -417,6 +419,15 @@ def _extract_token_info(
"completion_tokens": usage.get("candidates_token_count", 0),
"total_tokens": usage.get("total_token_count", 0),
}
# AWS Bedrock / newer LangChain style - usage_metadata on the message
elif hasattr(gen, "message") and hasattr(gen.message, "usage_metadata"):
usage = gen.message.usage_metadata
if usage:
token_usage = {
"prompt_tokens": usage.get("input_tokens", 0),
"completion_tokens": usage.get("output_tokens", 0),
"total_tokens": usage.get("total_tokens", 0),
}

return {
"prompt_tokens": token_usage.get("prompt_tokens", 0),
Expand Down