Thanks — I see you're hitting this error when converting a session report to a dict: ERROR: Object of type RealtimeModelBeta is not JSON serializable This happens because

ctx.make_session_report()

(or the session/agent state it pulls from) contains a non-serializable object such as a

RealtimeModelBeta

instance. When

to_dict(report)

walks the report it attempts to convert every field, including any attached model objects, and JSON serialization fails. What you can do now 1. Confirm where the model instance is stored ◦ Check

session.userdata

, any

agent

attributes, or other objects that the session report collects. Look for a direct reference to

RealtimeModelBeta

(or other model objects). ◦ If you find it, remove or replace that reference with a serializable identifier (string name, model id, or dict of the properties you need). 1. Build a safe, serializable report object ◦ Instead of blindly calling

to_dict(report)

, extract only the serializable fields you need:

report: SessionReport = ctx.make_session_report()
     report_dict = {
         "room_name": report.room_name,
         "start_time": report.start_time,
         "end_time": report.end_time,
         "duration": report.duration,
         "llm_usage": report.llm_usage,  # ensure this is plain data
         "status": report.status,
         # add only other simple fields you need
     }

• If a field like

llm_usage

contains nested objects, convert those nested parts to primitives before including them. 1. Filter or redact non-serializable fields automatically ◦ Use a helper that strips out non-serializable values (e.g., attempt JSON serialization and drop fields that fail) or recursively replace objects with

str(obj)

or an identifier. ◦ Example pattern:

import json

     def safe_serialize(obj):
         try:
             json.dumps(obj)
             return obj
         except (TypeError, OverflowError):
             return str(obj)  # or return None or an id placeholder

Then map

safe_serialize

over report fields you may not fully control. 1. Version check ◦ Ensure you are using livekit-agents >= 1.3.0, which added better session report serialization. If you are on an older version, upgrading may prevent some of these issues. If you'd like, I can help more effectively — please share: • A short printout of

report.__dict__

or

report

fields (you can redact any sensitive data). That will show which field contains the

RealtimeModelBeta

. • Which livekit-agents version you're using. I can then point to exactly which field to remove or provide a small helper to sanitize your report before

to_dict

. Sources: Agent session | LiveKit Documentation | Where to find your Agent Logs | LiveKit | Redacting PII from agent logs and transcripts | LiveKit