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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. S2.1 ProFish AudioRemove
  3. Claude Sonnet 5.5AnthropicRemove
  4. Voxtral Small 24B 2507 STTMistral AIRemove

4 is the maximum. Remove one to add another.

s1 vs s2.1-pro vs claude-sonnet-5.5 vs voxtral-small-24b-2507-stt
AttributeS1s1S2.1 Pros2.1-proClaude Sonnet 5.5claude-sonnet-5.5Voxtral Small 24B 2507 STTvoxtral-small-24b-2507-stt
Pricing
Input$0 / 1M$0 / 1M$2.00 / 1M$0 / 1M
Output$0 / 1M$0 / 1M$10.00 / 1M$0 / 1M
Cache Write (5m)Not applicableNot applicable$2.50 / 1MNot applicable
Cache Write (1h)Not applicableNot applicable$4.00 / 1MNot applicable
Cache ReadNot applicableNot applicable$0.20 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/AN/A1MN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoYesNo
Function CallingNoNoYesNo
JSON ModeNoNoYesNo
StreamingNoNoYesNo
Catalogue
ProviderFish AudioFish AudioAnthropicMistral AI
Categoryvoicevoicechatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-07-292026-07-29—2026-08-13
Description
SummaryFish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.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.Mistral AI Voxtral Small (24B) speech-to-text. Billed per second of audio.