GPT-4o Transcribe vs Reson8 Rumble-2
Accuracy and speed
Left gets fewer words wrong. Lower has the final text ready sooner.
- 4o Transcribe3.90% · 652ms
- Rumble-21.69% · 18ms
Reson8 Rumble-2 is ahead of GPT-4o Transcribe on both datasets together, the Pipecat Dataset, the Ocular Dataset and final-text delay.
Last updated Methodology by Dileep Chagam
Who is better at what
- Overall WER6.85%2.05%
- Pipecat Dataset WER3.90%1.69%
- Ocular Dataset WER12.45%2.75%
- Time to first textn/a486ms
- Final-text delay652ms18ms
Lower is better on every measure. Too close to call means the likely ranges overlap.
4o Transcribe vs Rumble-2 FAQ
Which is more accurate, GPT-4o Transcribe or Reson8 Rumble-2?
Reson8 Rumble-2 is more accurate on both datasets. On the 1,000 public Pipecat clips, GPT-4o Transcribe scores 6.85% and Reson8 Rumble-2 2.05%, so Reson8 Rumble-2 makes fewer errors by 4.80 points. On the 300 licensed Ocular turns, GPT-4o Transcribe scores 3.90% and Reson8 Rumble-2 1.69%, so Reson8 Rumble-2 makes fewer errors by 2.21 points. Word error rate counts incorrect, missing, and extra words, so lower is better.
Reson8 Rumble-2 is more accurate on both datasets. On the 1,000 public Pipecat clips, GPT-4o Transcribe scores 6.85% and Reson8 Rumble-2 2.05%, so Reson8 Rumble-2 makes fewer errors by 4.80 points. On the 300 licensed Ocular turns, GPT-4o Transcribe scores 3.90% and Reson8 Rumble-2 1.69%, so Reson8 Rumble-2 makes fewer errors by 2.21 points. Word error rate counts incorrect, missing, and extra words, so lower is better.
Final-text delay was not measured for one or both, so speed cannot be compared. Both are measured on the same 206 streamed turns.
Reson8 Rumble-2 makes fewer errors on real conversations, and the two are not separated on speed. A voice agent cannot reply until the final transcript arrives, and the Ocular recordings are real conversations.
Only Reson8 Rumble-2. GPT-4o Transcribe returns no text until the speaker stops, which matters if your agent reacts to partial transcripts.
Test your voice agent the same way.
Cekura runs these simulated calls on your agent and scores every one.