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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. GPT-6 Astra ProOpenAIRemove
  3. Perceptron Mk1.5PerceptronRemove
  4. Universal-3.5 ProAssemblyAIRemove

4 is the maximum. Remove one to add another.

s1 vs gpt-6-astra-pro vs perceptron-mk1.5 vs universal-3-5-pro
AttributeS1s1GPT-6 Astra Progpt-6-astra-proPerceptron Mk1.5perceptron-mk1.5Universal-3.5 Prouniversal-3-5-pro
Pricing
Input$0 / 1M$10.00 / 1M$0.15 / 1M$0 / 1M
Output$0 / 1M$50.00 / 1M$1.50 / 1M$0 / 1M
Cache Write (5m)Not applicable$10.00 / 1M$0.15 / 1MNot applicable
Cache Write (1h)Not applicable$10.00 / 1M$0.15 / 1MNot applicable
Cache ReadNot applicable$10.00 / 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 AudioOpenAIPerceptronAssemblyAI
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.GPT-6 Astra Pro uses the same underlying model as GPT-6 Astra, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. Optimized for deeper reasoning, greater accuracy, and more reliable multi-step execution, it is well suited for demanding coding, analysis, and agentic workflows where solution quality takes priority over speed and cost.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.