Google Chirp 2 vs GPT-4o Transcribe
Accuracy and speed
Left gets fewer words wrong. Lower has the final text ready sooner.
- Chirp 22.59% · 568ms
- 4o Transcribe3.90% · 652ms
Google Chirp 2 is ahead of GPT-4o Transcribe on both datasets together, the Pipecat Dataset, the Ocular Dataset and final-text delay. Google Chirp 2 has a newer release: Google Chirp 3 vs GPT-4o Transcribe.
Last updated Methodology by Dileep Chagam
Who is better at what
- Overall WER3.01%6.85%
- Pipecat Dataset WER2.59%3.90%
- Ocular Dataset WER3.80%12.45%
- Time to first text4.50sn/a
- Final-text delay568ms652ms
Lower is better on every measure. Too close to call means the likely ranges overlap.
Chirp 2 vs 4o Transcribe FAQ
Which is more accurate, Google Chirp 2 or GPT-4o Transcribe?
Google Chirp 2 is more accurate on both datasets. On the 1,000 public Pipecat clips, Google Chirp 2 scores 3.01% and GPT-4o Transcribe 6.85%, so Google Chirp 2 makes fewer errors by 3.84 points. On the eight licensed Ocular recordings, Google Chirp 2 scores 2.59% and GPT-4o Transcribe 3.90%, so Google Chirp 2 makes fewer errors by 1.31 points. Word error rate counts incorrect, missing, and extra words, so lower is better.
Google Chirp 2 is more accurate on both datasets. On the 1,000 public Pipecat clips, Google Chirp 2 scores 3.01% and GPT-4o Transcribe 6.85%, so Google Chirp 2 makes fewer errors by 3.84 points. On the eight licensed Ocular recordings, Google Chirp 2 scores 2.59% and GPT-4o Transcribe 3.90%, so Google Chirp 2 makes fewer errors by 1.31 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.
Google Chirp 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 Google Chirp 2. GPT-4o Transcribe returns no text until the speaker stops, which matters if your agent reacts to partial transcripts.
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