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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. Perceptron Mk1.5PerceptronRemove
  2. Grok STT 1.0xAIRemove
  3. Gemini 3.5 TranscribeGoogleRemove
  4. S2.1 ProFish AudioRemove

4 is the maximum. Remove one to add another.

perceptron-mk1.5 vs grok-stt-1.0 vs gemini-3.5-transcribe vs s2.1-pro
AttributePerceptron Mk1.5perceptron-mk1.5Grok STT 1.0grok-stt-1.0Gemini 3.5 Transcribegemini-3.5-transcribeS2.1 Pros2.1-pro
Pricing
Input$0.15 / 1M$0 / 1M$0 / 1M$0 / 1M
Output$1.50 / 1M$0 / 1M$0 / 1M$0 / 1M
Cache Write (5m)$0.15 / 1MNot applicableNot applicableNot applicable
Cache Write (1h)$0.15 / 1MNot applicableNot applicableNot applicable
Cache Read$0.15 / 1MNot applicableNot applicableNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max context36.9KN/A98.3KN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoYesNo
Function CallingNoNoYesNo
JSON ModeNoNoNoNo
StreamingYesNoNoNo
Catalogue
ProviderPerceptronxAIGoogleFish Audio
Categorychatvoicevoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-09-252026-07-232026-09-252026-07-29
Description
SummaryPerceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.xAI Grok STT 1.0 speech-to-text. Billed per second of audio.Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.Fish Audio S2.1 Pro text-to-speech. Billed per UTF-8 byte of input text.