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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. Grok 4.20 BetaxAIRemove
  2. Perceptron Mk1.5PerceptronRemove
  3. GPT-6 Luna ProOpenAIRemove
grok-4.20-beta vs perceptron-mk1.5 vs gpt-6-luna-pro
AttributeGrok 4.20 Betagrok-4.20-betaPerceptron Mk1.5perceptron-mk1.5GPT-6 Luna Progpt-6-luna-pro
Pricing
Input$2.00 / 1M$0.15 / 1M$0.10 / 1M
Output$6.00 / 1M$1.50 / 1M$0.50 / 1M
Cache Write (5m)$2.00 / 1M$0.15 / 1M$0.10 / 1M
Cache Write (1h)$2.00 / 1M$0.15 / 1M$0.10 / 1M
Cache Read$2.00 / 1M$0.15 / 1M$0.10 / 1M
Web Search$0 / 1M$0 / 1M$0 / 1M
Context
Max context2M36.9K1.1M
Max outputN/AN/AN/A
Capabilities
VisionYesNoYes
Function CallingYesNoYes
JSON ModeYesNoYes
StreamingYesYesYes
Catalogue
ProviderxAIPerceptronOpenAI
Categorychatchatchat
Charge typePay As You GoPay As You GoPay As You Go
Released—2026-09-25—
Description
SummaryGrok 4.20 Beta is xAI's newest flagship model, designed for high-performance reasoning with industry-leading speed and strong agentic tool-calling capabilities. It emphasizes strict prompt adherence and low hallucination rates, enabling highly reliable and precise responses across complex tasks. Optimized for agent workflows and real-time applications, Grok 4.20 Beta delivers consistent, truthful outputs while maintaining fast inference and strong task execution reliability.Perceptron Mk1.5 chat model that accepts audio input. Audio and text input are billed per token.GPT-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.