Tracker›Changelog›2026-09-17-stream-num-variants-in-stream-added

New stream event type num_variants_in_stream

observedstructure · stream2026-09-17-stream-num-variants-in-stream-added

Instrument state: Schema 21 · v2 · Bookmarklet 2.7 · measure · gpt-5-6

Evidence

After
{
  "sse_event_types": [
    "num_variants_in_stream"
  ]
}
Breadth
2/32 prompts · local
Modes
instant + thinking
Measuring days
17 Sept 2026 · 2 field diffs in events.jsonl
Raw data excerpt (K3-01__instant, 2026-09-17)
{
  "har.sse_event_types": [
    "async_image",
    "cite",
    "conversation_detail_metadata",
    "entity",
    "event:delta",
    "event:delta_encoding",
    "input_message",
    "message_marker",
    "message_stream_complete",
    "num_variants_in_stream",
    "open_entity_detail",
    "resume_conversation_token",
    "search_model_queries",
    "search_result",
    "search_result_group",
    "server_ste_metadata",
    "stop",
    "title_generation"
  ]
}

Daily data of 17 Sept 2026 →

Context

stream/num-variants-in-stream

Impact

No evidenced impact.

Status history

17 Sept 2026observed