Compare Flux to Nova-3

Compare Flux to Nova-3 to understand the differences so you can choose the right model for your use case.

Feature Matrix Comparison

It’s important to understand the differences between Flux and Nova-3 so you can choose the right model for your use case. Below is a feature matrix comparison to help you understand the differences.

Use Cases

Feature	Flux	Nova-3
Voice Agents	✅	✅
IVR Systems	✅	✅
Agent Assist	✅	✅
Real-time Transcription	✅	✅
Meeting Transcription	🚫	✅
Event Captioning	🚫	✅
Pre-recorded Audio	🚫	✅
Call Analytics	🚫	✅

Language Support

Feature	Flux	Nova-3
English	✅	✅
Multilingual	✅ `flux-general-multi` — 10 languages (Language Prompting)	✅ `language=multi` — 55 languages (see language support)
Monolingual languages	🚫	✅ Full list
Language control	`language_hint` parameter	`language` parameter; `language_hint` with `language=multi` (Nova-3 Language Prompting)
Code-switching	✅ Native with `flux-general-multi`	✅ With `language=multi`

Technical Details

Feature	Flux	Nova-3
Self-hosted Availability	✅	✅
Endpoint	`/v2/listen`	`/v1/listen`

Conversation Features

Feature	Flux	Nova-3
Start of Turn	✅	🚫
Speech Resumed	✅	🚫
End of Turn	✅	🚫
Eager End of Turn	✅	🚫

Transcription Features

Feature	Flux	Nova-3
Word Times	✅	✅
Smart Formatting	🚫	✅
Numerals	✅	✅
Speaker Diarization	🚫	✅
Filler Words	✅ Transcribed by default	🚫
Profanity Filtering	🚫	✅
Redaction	✅ Numbers only	✅
Find and Replace	🚫	✅
Keyterm Prompting	✅	✅
Search	🚫	✅
Turn-based Transcription	✅	🚫

Connection Management

Feature	Flux	Nova-3
Endpointing + Utterance End	✅ (Replaced by model integrated turn detection)	✅
Interim Results	✅ (Replaced by Update Messages)	✅
Keep Alive	✅ (Replaced by pings, 60s timeout)	✅ (12s timeout)