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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. Claude Sonnet 5.5AnthropicRemove
  3. S2.1 ProFish AudioRemove
  4. Perceptron Mk1.5PerceptronRemove

4 is the maximum. Remove one to add another.

grok-stt-1.0 vs claude-sonnet-5.5 vs s2.1-pro vs perceptron-mk1.5
AttributeGrok STT 1.0grok-stt-1.0Claude Sonnet 5.5claude-sonnet-5.5S2.1 Pros2.1-proPerceptron Mk1.5perceptron-mk1.5
Pricing
Input$0 / 1M$2.00 / 1M$0 / 1M$0.15 / 1M
Output$0 / 1M$10.00 / 1M$0 / 1M$1.50 / 1M
Cache Write (5m)Not applicable$2.50 / 1MNot applicable$0.15 / 1M
Cache Write (1h)Not applicable$4.00 / 1MNot applicable$0.15 / 1M
Cache ReadNot applicable$0.20 / 1MNot applicable$0.15 / 1M
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A1MN/A36.9K
Max outputN/AN/AN/AN/A
Capabilities
VisionNoYesNoNo
Function CallingNoYesNoNo
JSON ModeNoYesNoNo
StreamingNoYesNoYes
Catalogue
ProviderxAIAnthropicFish AudioPerceptron
Categoryvoicechatvoicechat
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-23—2026-07-292026-09-25
Description
SummaryxAI Grok STT 1.0 speech-to-text. Billed per second of audio.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.Fish Audio S2.1 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.