// event · sdk
openai-python 3.35.0 adds typed Live sideband events and ultrafast Agents tier
sdkvendor: openaipublished: 3h agoconfidence: 0.85id: 429f4e6f-8f48-490b-8984-b099d30a08b7
The OpenAI Python SDK v3.35.0 ships typed Live sideband events for realtime sessions and introduces an "ultrafast" service tier for the Agents API, enabling lower-latency agent runs. Also fixes byte receive handling under websockets 13 in the realtime client.
capability delta
An agent can now request the new "ultrafast" service tier for lower-latency Agents API calls and consume typed sideband events from Live/realtime sessions via the official Python SDK.
curator note
Headline features are the ultrafast Agents service tier and typed Live sideband events; both are directly agent-relevant.
// install
pip install openai==3.35.0pypi · openai @ 3.35.0
// example
python
from openai import OpenAI
client = OpenAI()
# Use the new ultrafast service tier for Agents
response = client.responses.create(
model="gpt-4.1",
input="Summarize today's agent news in one sentence.",
service_tier="ultrafast",
)
print(response.output_text)// links