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Apertis

Compare models

Put up to 4 models beside each other — token prices, context windows, capabilities and provider, from the same catalogue the model pages read.

  1. Aura-2DeepgramRemove
  2. Universal-3.5 ProAssemblyAIRemove
  3. S2 ProFish AudioRemove
  4. Nova-3DeepgramRemove

4 is the maximum. Remove one to add another.

aura-2 vs universal-3-5-pro vs s2-pro vs nova-3
AttributeAura-2aura-2Universal-3.5 Prouniversal-3-5-proS2 Pros2-proNova-3nova-3
Pricing
Input$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Output$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Cache Write (5m)Not applicableNot applicableNot applicableNot applicable
Cache Write (1h)Not applicableNot applicableNot applicableNot applicable
Cache ReadNot applicableNot applicableNot applicableNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/AN/AN/AN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoNoNo
Function CallingNoNoNoNo
JSON ModeNoNoNoNo
StreamingNoNoNoNo
Catalogue
ProviderDeepgramAssemblyAIFish AudioDeepgram
Categoryvoicevoicevoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-162026-09-222026-07-292026-07-15
Description
SummaryDeepgram Aura-2 text-to-speech for real-time voice applications. Billed per input character.AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.Deepgram Nova-3 speech-to-text. Billed per second of audio.