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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. Perceptron Mk1.5PerceptronRemove
  2. S1Fish AudioRemove
  3. GPT-6 LunaOpenAIRemove
  4. Universal-3.5 ProAssemblyAIRemove

4 is the maximum. Remove one to add another.

perceptron-mk1.5 vs s1 vs gpt-6-luna vs universal-3-5-pro
AttributePerceptron Mk1.5perceptron-mk1.5S1s1GPT-6 Lunagpt-6-lunaUniversal-3.5 Prouniversal-3-5-pro
Pricing
Input$0.15 / 1M$0 / 1M$0.10 / 1M$0 / 1M
Output$1.50 / 1M$0 / 1M$0.50 / 1M$0 / 1M
Cache Write (5m)$0.15 / 1MNot applicable$0.10 / 1MNot applicable
Cache Write (1h)$0.15 / 1MNot applicable$0.10 / 1MNot applicable
Cache Read$0.15 / 1MNot applicable$0.10 / 1MNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max context36.9KN/A1.1MN/A
Max outputN/AN/AN/AN/A
Capabilities
VisionNoNoYesNo
Function CallingNoNoYesNo
JSON ModeNoNoYesNo
StreamingYesNoYesNo
Catalogue
ProviderPerceptronFish AudioOpenAIAssemblyAI
Categorychatvoicechatvoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released2026-09-252026-07-29—2026-09-22
Description
SummaryPerceptron 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.GPT-6 Luna is the fast, cost-efficient model in OpenAI's GPT-6 series, optimized for high-volume and latency-sensitive workloads such as chat, classification, and lightweight agentic tasks. It combines low-cost, responsive inference with the GPT-6 family’s improvements in factual reliability and clear, concise communication. At higher reasoning effort, GPT-6 Luna can also handle complex software engineering and computer-use workflows that previously required a Sol-tier model, making it a versatile choice for scalable production applications that need to balance speed, cost, and capability.AssemblyAI Universal-3.5 Pro speech-to-text. Billed per second of audio.