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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. Universal-3.5 ProAssemblyAIRemove
  2. S1Fish AudioRemove
  3. GPT-6 Luna ProOpenAIRemove
  4. Transcribe 1Fish AudioRemove

4 is the maximum. Remove one to add another.

universal-3-5-pro vs s1 vs gpt-6-luna-pro vs transcribe-1
AttributeUniversal-3.5 Prouniversal-3-5-proS1s1GPT-6 Luna Progpt-6-luna-proTranscribe 1transcribe-1
Pricing
Input$0 / 1M$0 / 1M$0.10 / 1M$0 / 1M
Output$0 / 1M$0 / 1M$0.50 / 1M$0 / 1M
Cache Write (5m)Not applicableNot applicable$0.10 / 1MNot applicable
Cache Write (1h)Not applicableNot applicable$0.10 / 1MNot applicable
Cache ReadNot applicableNot applicable$0.10 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/AN/A1.1MN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoYesNo
Function CallingNoNoYesNo
JSON ModeNoNoYesNo
StreamingNoNoYesNo
Catalogue
ProviderAssemblyAIFish AudioOpenAIFish Audio
Categoryvoicevoicechatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-09-222026-07-29—2026-07-29
Description
SummaryAssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.GPT-6 Luna Pro uses the same underlying model as GPT-6 Luna, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. It combines Luna's speed and cost efficiency with deeper reasoning and more reliable multi-step execution, making it well suited for advanced coding, computer use, and agentic workflows where higher solution quality is needed without moving to a larger GPT-6 tier.Fish Audio Transcribe 1 speech-to-text. Billed per second of audio.