OpenAIDeepgramAudio matchupSpeech to text
GPT-Realtime-Whispervs.Flux
Which model is better?
GPT-Realtime-Whisper and Flux each lead in different tests.
Pick GPT-Realtime-Whisper for
Pick Flux for
Shared tests
Independent evaluators and leaderboards only, the newest shared snapshot per evaluator. With 95 % ranges a lead counts when they do not overlap; for hit rates, when it holds in a 95 % test. Without any uncertainty figure at most “slightly ahead”.
Coval
Flux slightly aheadFlux is clearly ahead in 0 of 16 subtests and slightly in 13, GPT-Realtime-Whisper in 0 clearly and slightly in 3.
Coval Word Error Rate (WER) per-sample p50
lower is better, as of November 5, 2026
Coval Time to Final Segment (TTFS) mean
lower is better, as of November 5, 2026
Coval Time to Final Segment (TTFS) p50
lower is better, as of November 5, 2026
Show all 16 subtests
| Subtest | GPT-Realtime-Whisper | Flux | Verdict |
|---|---|---|---|
| Coval Word Error Rate (WER) per-sample p50 (lower is better) | 0.0 % | 3.1 % | GPT-Realtime-Whisper slightly ahead |
| Coval Time to Final Segment (TTFS) mean (lower is better) | 564 ms | 102 ms | Flux slightly ahead |
| Coval Time to Final Segment (TTFS) p50 (lower is better) | 547 ms | 99 ms | Flux slightly ahead |
| Coval Time to First Token (TTFT) maximum (lower is better) | 10,968 ms | 4,616 ms | Flux slightly ahead |
| Coval AudioToFinal maximum (lower is better) | 30.01 s | 17.25 s | Flux slightly ahead |
| Coval Time to First Token (TTFT) mean (lower is better) | 1,820 ms | 1,095 ms | Flux slightly ahead |
| Coval Time to First Token (TTFT) p50 (lower is better) | 1,878 ms | 1,172 ms | Flux slightly ahead |
| Coval Time to Final Segment (TTFS) maximum (lower is better) | 20,386 ms | 13,993 ms | Flux slightly ahead |
| Coval pooled corpus Word Error Rate (WER) (lower is better) | 4.0 % | 5.7 % | GPT-Realtime-Whisper slightly ahead |
| Coval Word Error Rate (WER) per-sample mean (lower is better) | 4.5 % | 6.4 % | GPT-Realtime-Whisper slightly ahead |
| Coval Word Error Rate (WER) per-sample maximum (lower is better) | 100.0 % | 92.3 % | Flux slightly ahead |
| Coval RTF mean (lower is better) | 1.09 | 1.02 | Flux slightly ahead |
| Coval AudioToFinal mean (lower is better) | 8.51 s | 8.05 s | Flux slightly ahead |
| Coval AudioToFinal p50 (lower is better) | 8.88 s | 8.42 s | Flux slightly ahead |
| Coval RTF p50 (lower is better) | 1.07 | 1.01 | Flux slightly ahead |
| Coval RTF maximum (lower is better) | 5.55 | 5.29 | Flux slightly ahead |
Source · latest November 5, 2026
Artificial Analysis
GPT-Realtime-Whisper slightly aheadArtificial Analysis AA-WER Streaming (final transcription)
lower is better, as of October 15, 2026
Source · latest October 15, 2026
All data side by side
Prices are verbatim from the provider, because audio models bill per minute, character or token.
| GPT-Realtime-Whisper | Flux | |
|---|---|---|
| Task | Speech to text | Speech to text |
| Developer | OpenAI | Deepgram |
| Status | Active | Active |
| Weights | proprietary | proprietary |
| Runs locally | no | no |
| Price | $0.017 per audio minute | n/a |
| Popularity (out of 100) | 34 | 37 |