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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. S2 ProFish AudioRemove
  2. Universal-3.5 ProAssemblyAIRemove
  3. Perceptron Mk1.5PerceptronRemove
  4. Transcribe 1Fish AudioRemove

4 is the maximum. Remove one to add another.

s2-pro vs universal-3-5-pro vs perceptron-mk1.5 vs transcribe-1
AttributeS2 Pros2-proUniversal-3.5 Prouniversal-3-5-proPerceptron Mk1.5perceptron-mk1.5Transcribe 1transcribe-1
Pricing
Input$0 / 1M$0 / 1M$0.15 / 1M$0 / 1M
Output$0 / 1M$0 / 1M$1.50 / 1M$0 / 1M
Cache Write (5m)Not applicableNot applicable$0.15 / 1MNot applicable
Cache Write (1h)Not applicableNot applicable$0.15 / 1MNot applicable
Cache ReadNot applicableNot applicable$0.15 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/AN/A36.9KN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoNoNo
Function CallingNoNoNoNo
JSON ModeNoNoNoNo
StreamingNoNoYesNo
Catalogue
ProviderFish AudioAssemblyAIPerceptronFish Audio
Categoryvoicevoicechatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-292026-09-222026-09-252026-07-29
Description
SummaryFish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.Fish Audio Transcribe 1 speech-to-text. Billed per second of audio.