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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. S2.1 ProFish AudioRemove
  2. Perceptron Mk1.5PerceptronRemove
  3. Nemotron 3.5 ASR Streaming Multilingual 0.6BNVIDIARemove
  4. S1Fish AudioRemove

4 is the maximum. Remove one to add another.

s2.1-pro vs perceptron-mk1.5 vs nemotron-3.5-asr-streaming-multilingual-0.6b vs s1
AttributeS2.1 Pros2.1-proPerceptron Mk1.5perceptron-mk1.5Nemotron 3.5 ASR Streaming Multilingual 0.6Bnemotron-3.5-asr-streaming-multilingual-0.6bS1s1
Pricing
Input$0 / 1M$0.15 / 1M$0 / 1M$0 / 1M
Output$0 / 1M$1.50 / 1M$0 / 1M$0 / 1M
Cache Write (5m)Not applicable$0.15 / 1MNot applicableNot applicable
Cache Write (1h)Not applicable$0.15 / 1MNot applicableNot applicable
Cache ReadNot applicable$0.15 / 1MNot applicableNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A36.9KN/AN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoNoNo
Function CallingNoNoNoNo
JSON ModeNoNoNoNo
StreamingNoYesNoNo
Catalogue
ProviderFish AudioPerceptronNVIDIAFish Audio
Categoryvoicechatvoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-292026-09-252026-08-132026-07-29
Description
SummaryFish Audio S2.1 Pro text-to-speech. Billed per UTF-8 byte of input text.Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.NVIDIA Nemotron 3.5 ASR multilingual speech-to-text (0.6B). Billed per second of audio.Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.