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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. Claude Sonnet 5.5AnthropicRemove
  2. GPT-6 Astra ProOpenAIRemove
  3. Perceptron Mk1.5PerceptronRemove
  4. S1Fish AudioRemove

4 is the maximum. Remove one to add another.

claude-sonnet-5.5 vs gpt-6-astra-pro vs perceptron-mk1.5 vs s1
AttributeClaude Sonnet 5.5claude-sonnet-5.5GPT-6 Astra Progpt-6-astra-proPerceptron Mk1.5perceptron-mk1.5S1s1
Pricing
Input$2.00 / 1M$10.00 / 1M$0.15 / 1M$0 / 1M
Output$10.00 / 1M$50.00 / 1M$1.50 / 1M$0 / 1M
Cache Write (5m)$2.50 / 1M$10.00 / 1M$0.15 / 1MNot applicable
Cache Write (1h)$4.00 / 1M$10.00 / 1M$0.15 / 1MNot applicable
Cache Read$0.20 / 1M$10.00 / 1M$0.15 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max context1M1M36.9KN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionYesYesNoNo
Function CallingYesYesNoNo
JSON ModeYesYesNoNo
StreamingYesYesYesNo
Catalogue
ProviderAnthropicOpenAIPerceptronFish Audio
Categorychatchatchatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released——2026-09-252026-07-29
Description
SummaryClaude 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.Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.Fish Audio S1 text-to-speech. Billed per UTF-8 byte of input text.