Enable Function calling and agent runner...

Did you update your vertexai integration package?

pip install -U llama-index-llms-vertexai

I did.
pip freeze | grep llama-index
llama-index==0.10.55
llama-index-agent-openai==0.2.8
llama-index-cli==0.1.12
llama-index-core==0.10.55
llama-index-embeddings-openai==0.1.10
llama-index-experimental==0.1.3
llama-index-indices-managed-llama-cloud==0.2.3
llama-index-legacy==0.9.48
llama-index-llms-anthropic==0.1.15
llama-index-llms-gemini==0.1.11
llama-index-llms-openai==0.1.25
llama-index-llms-vertex==0.2.1
llama-index-multi-modal-llms-openai==0.1.7
llama-index-postprocessor-cohere-rerank==0.1.7
llama-index-program-openai==0.1.6
llama-index-question-gen-openai==0.1.3
llama-index-readers-file==0.1.29
llama-index-readers-llama-parse==0.1.6
llama-index-vector-stores-chroma==0.1.10

i think it should be gemini package, not vertex

Oh, that pr was for vertex, not gemini

so we cannot use function calling with llam]aindex and gemini right?

thats a shame, on lmsys the flast 1.5is much better than gpt 3.5:/

Not unless someone implements it, or you use gemini through vertexai