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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. GPT-6 Luna ProOpenAIRemove
  2. Perceptron Mk1.5PerceptronRemove
  3. S2 ProFish AudioRemove
  4. Gemini 3.5 TranscribeGoogleRemove

4 is the maximum. Remove one to add another.

gpt-6-luna-pro vs perceptron-mk1.5 vs s2-pro vs gemini-3.5-transcribe
AttributeGPT-6 Luna Progpt-6-luna-proPerceptron Mk1.5perceptron-mk1.5S2 Pros2-proGemini 3.5 Transcribegemini-3.5-transcribe
Pricing
Input$0.10 / 1M$0.15 / 1M$0 / 1M$0 / 1M
Output$0.50 / 1M$1.50 / 1M$0 / 1M$0 / 1M
Cache Write (5m)$0.10 / 1M$0.15 / 1MNot applicableNot applicable
Cache Write (1h)$0.10 / 1M$0.15 / 1MNot applicableNot applicable
Cache Read$0.10 / 1M$0.15 / 1MNot applicableNot applicable
Web Search$0 / 1M$0 / 1M$0 / 1M$0 / 1M
Context
Max context1.1M36.9KN/A98.3K
Max outputN/AN/AN/AN/A
Capabilities
VisionYesNoNoYes
Function CallingYesNoNoYes
JSON ModeYesNoNoNo
StreamingYesYesNoNo
Catalogue
ProviderOpenAIPerceptronFish AudioGoogle
Categorychatchatvoicevoice
Charge typePay As You GoPay As You GoPay As You GoPay As You Go
Released—2026-09-252026-07-292026-09-25
Description
SummaryGPT-6 Luna Pro uses the same underlying model as GPT-6 Luna, but runs with reasoning.mode set to pro for higher-quality responses on complex tasks. It combines Luna's speed and cost efficiency with deeper reasoning and more reliable multi-step execution, making it well suited for advanced coding, computer use, and agentic workflows where higher solution quality is needed without moving to a larger GPT-6 tier.Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.Fish Audio S2 Pro text-to-speech. Billed per UTF-8 byte of input text.Google Gemini 3.5 Transcribe speech-to-text. Billed per input and output token.