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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. GPT-6 Astra ProOpenAIRemove
  4. Gemini 3.5 TranscribeGoogleRemove

4 is the maximum. Remove one to add another.

s1 vs claude-sonnet-5.5 vs gpt-6-astra-pro vs gemini-3.5-transcribe
AttributeS1s1Claude Sonnet 5.5claude-sonnet-5.5GPT-6 Astra Progpt-6-astra-proGemini 3.5 Transcribegemini-3.5-transcribe
Pricing
Input$0 / 1M$2.00 / 1M$10.00 / 1M$0 / 1M
Output$0 / 1M$10.00 / 1M$50.00 / 1M$0 / 1M
Cache Write (5m)Not applicable$2.50 / 1M$10.00 / 1MNot applicable
Cache Write (1h)Not applicable$4.00 / 1M$10.00 / 1MNot applicable
Cache ReadNot applicable$0.20 / 1M$10.00 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A1M1M98.3K
Max outputN/AN/AN/AN/A
Capabilities
VisionNoYesYesYes
Function CallingNoYesYesYes
JSON ModeNoYesYesNo
StreamingNoYesYesNo
Catalogue
ProviderFish AudioAnthropicOpenAIGoogle
Categoryvoicechatchatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-29——2026-09-25
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.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.Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.