{%- for message in messages -%}
{{- '<|im_start|>' + message['role'] + '\n' -}}
{%- if message['content'] is string -%}
{{- message['content'] -}}
{%- else -%}
{%- for content in message['content'] -%}
{%- if content['type'] == 'image_url' or content['type'] == 'image' -%}
{{- '<image>' -}}
{%- elif content['type'] == 'text' -%}
{{- content['text'] -}}
{%- endif -%}
{%- endfor -%}
{%- endif -%}
{{- '<|im_end|>\n' -}}
{%- endfor -%}
{%- if add_generation_prompt -%}
{{- '<|im_start|>assistant\n' -}}
{%- endif -%}