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feat: enhance system message handling with prompt caching in Anthropi… #5131

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feat: enhance system message handling with prompt caching in Anthropi… #5131

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feat: enhance system message handling with prompt caching in Anthropi…
lorenzejay Mar 26, 2026
98725ed
Merge branch 'main' of github.com:crewAIInc/crewAI into lorenze/imp/a…
lorenzejay Mar 26, 2026
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lorenzejay Mar 26, 2026
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13 changes: 11 additions & 2 deletions lib/crewai/src/crewai/llms/providers/anthropic/completion.py
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Original file line number Diff line number Diff line change
Expand Up @@ -469,9 +469,15 @@ def _prepare_completion_params(
"stream": self.stream,
}

# Add system message if present
# Add system message if present, with prompt caching
if system_message:
params["system"] = system_message
params["system"] = [
{
"type": "text",
"text": system_message,
"cache_control": {"type": "ephemeral"},
}
]

# Add optional parameters if set
if self.temperature is not None:
Expand All @@ -497,6 +503,9 @@ def _prepare_completion_params(
if self.tool_search is not None and len(regular_tools) >= 2:
converted_tools = self._apply_tool_search(converted_tools)

if converted_tools:
converted_tools[-1]["cache_control"] = {"type": "ephemeral"}

params["tools"] = converted_tools

if available_functions and len(regular_tools) == 1:
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