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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. Aura-2DeepgramRemove
  3. S2 ProFish AudioRemove
  4. Claude Sonnet 5.5AnthropicRemove

4 is the maximum. Remove one to add another.

universal-3-5-pro vs aura-2 vs s2-pro vs claude-sonnet-5.5
AttributeUniversal-3.5 Prouniversal-3-5-proAura-2aura-2S2 Pros2-proClaude Sonnet 5.5claude-sonnet-5.5
Pricing
Input$0 / 1M$0 / 1M$0 / 1M$2.00 / 1M
Output$0 / 1M$0 / 1M$0 / 1M$10.00 / 1M
Cache Write (5m)Not applicableNot applicableNot applicable$2.50 / 1M
Cache Write (1h)Not applicableNot applicableNot applicable$4.00 / 1M
Cache ReadNot applicableNot applicableNot applicable$0.20 / 1M
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/AN/AN/A1M
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoNoYes
Function CallingNoNoNoYes
JSON ModeNoNoNoYes
StreamingNoNoNoYes
Catalogue
ProviderAssemblyAIDeepgramFish AudioAnthropic
Categoryvoicevoicevoicechat
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-09-222026-07-162026-07-29—
Description
SummaryAssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.Deepgram Aura-2 text-to-speech for real-time voice applications. Billed per input character.Fish Audio S2 Pro 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.