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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. Perceptron Mk1.5PerceptronRemove
  3. S2.1 ProFish AudioRemove
s1 vs perceptron-mk1.5 vs s2.1-pro
AttributeS1s1Perceptron Mk1.5perceptron-mk1.5S2.1 Pros2.1-pro
Pricing
Input$0 / 1M$0.15 / 1M$0 / 1M
Output$0 / 1M$1.50 / 1M$0 / 1M
Cache Write (5m)Not applicable$0.15 / 1MNot applicable
Cache Write (1h)Not applicable$0.15 / 1MNot applicable
Cache ReadNot applicable$0.15 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M
Context
Max contextN/A36.9KN/A
Max outputN/AN/AN/A
Capabilities
VisionNoNoNo
Function CallingNoNoNo
JSON ModeNoNoNo
StreamingNoYesNo
Catalogue
ProviderFish AudioPerceptronFish Audio
Categoryvoicechatvoice
Charge typePay As You GoPay As You GoPay As You Go
Released2026-07-292026-09-252026-07-29
Description
SummaryFish Audio S1 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.Fish Audio S2.1 Pro text-to-speech. Billed per UTF-8 byte of input text.