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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. Grok STT 1.0xAIRemove
  2. Gemini 3.5 TranscribeGoogleRemove
  3. S2.1 ProFish AudioRemove
  4. Claude Sonnet 5.5AnthropicRemove

4 is the maximum. Remove one to add another.

grok-stt-1.0 vs gemini-3.5-transcribe vs s2.1-pro vs claude-sonnet-5.5
AttributeGrok STT 1.0grok-stt-1.0Gemini 3.5 Transcribegemini-3.5-transcribeS2.1 Pros2.1-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/A98.3KN/A1M
Max outputN/AN/AN/AN/A
Capabilities
VisionNoYesNoYes
Function CallingNoYesNoYes
JSON ModeNoNoNoYes
StreamingNoNoNoYes
Catalogue
ProviderxAIGoogleFish AudioAnthropic
Categoryvoicevoicevoicechat
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-232026-09-252026-07-29—
Description
SummaryxAI Grok STT 1.0 speech-to-text. Billed per second of audio.Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.Fish Audio S2.1 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.