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

4 is the maximum. Remove one to add another.

s2-pro vs perceptron-mk1.5 vs universal-3-5-pro vs gpt-6-astra
AttributeS2 Pros2-proPerceptron Mk1.5perceptron-mk1.5Universal-3.5 Prouniversal-3-5-proGPT-6 Astragpt-6-astra
Pricing
Input$0 / 1M$0.15 / 1M$0 / 1M$10.00 / 1M
Output$0 / 1M$1.50 / 1M$0 / 1M$50.00 / 1M
Cache Write (5m)Not applicable$0.15 / 1MNot applicable$10.00 / 1M
Cache Write (1h)Not applicable$0.15 / 1MNot applicable$10.00 / 1M
Cache ReadNot applicable$0.15 / 1MNot applicable$10.00 / 1M
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A36.9KN/A1M
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoNoYes
Function CallingNoNoNoYes
JSON ModeNoNoNoYes
StreamingNoYesNoYes
Catalogue
ProviderFish AudioPerceptronAssemblyAIOpenAI
Categoryvoicechatvoicechat
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-292026-09-252026-09-22—
Description
SummaryFish Audio S2 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.AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.GPT-6 Astra is OpenAI's flagship model for demanding end-to-end professional work, designed for advanced analysis, software engineering, deep research, scientific tasks, and document creation. It is particularly strong in long-horizon agentic workflows, including tasks that require sustained reasoning, tool orchestration, and computer and browser use, making it well suited for complex autonomous workflows and production-grade knowledge work.