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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. S1Fish AudioRemove
  2. Claude Sonnet 5.5AnthropicRemove
  3. Perceptron Mk1.5PerceptronRemove
  4. Universal-3.5 ProAssemblyAIRemove

4 is the maximum. Remove one to add another.

s1 vs claude-sonnet-5.5 vs perceptron-mk1.5 vs universal-3-5-pro
AttributeS1s1Claude Sonnet 5.5claude-sonnet-5.5Perceptron Mk1.5perceptron-mk1.5Universal-3.5 Prouniversal-3-5-pro
Pricing
Input$0 / 1M$2.00 / 1M$0.15 / 1M$0 / 1M
Output$0 / 1M$10.00 / 1M$1.50 / 1M$0 / 1M
Cache Write (5m)Not applicable$2.50 / 1M$0.15 / 1MNot applicable
Cache Write (1h)Not applicable$4.00 / 1M$0.15 / 1MNot applicable
Cache ReadNot applicable$0.20 / 1M$0.15 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A1M36.9KN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoYesNoNo
Function CallingNoYesNoNo
JSON ModeNoYesNoNo
StreamingNoYesYesNo
Catalogue
ProviderFish AudioAnthropicPerceptronAssemblyAI
Categoryvoicechatchatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-29—2026-09-252026-09-22
Description
SummaryFish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.Claude Sonnet 5.5 is Anthropic's Sonnet-class model for well-scoped everyday work, serving as a direct upgrade to Sonnet 5. It excels at feature development, bug fixing, and creating polished documents, presentations, and spreadsheets, while offering clearer writing and communication than its predecessor.Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.