token.app › Compare › Grok 4.20 Multi-Agent vs GPT-5.6 Luna

Grok 4.20 Multi-Agent vs GPT-5.6 Luna

GPT-5.6 Luna is 6.9× cheaper per token on a blended 3:1 basis. Grok 4.20 Multi-Agent accepts the larger context window (2M).

Head to head
Blended price uses a 3:1 input:output mix
Grok 4.20 Multi-AgentGPT-5.6 Luna
ProviderxAIOpenAI
Input $/1M$1.25$0.100
Output $/1M$2.50$0.600
Blended $/1M$1.56$0.225
Context window2M1.1M
Max output—128K
ReleasedMar 2026Jul 2026
LicenceProprietaryProprietary
Choose Grok 4.20 Multi-Agent if…
  • Larger context window (2M)
Choose GPT-5.6 Luna if…
  • Costs less per token — $0.225 vs $1.56 blended
  • Newer model (released Jul 2026)
FAQ
Which is better, Grok 4.20 Multi-Agent or GPT-5.6 Luna?
We do not hold independently-run benchmark scores covering both Grok 4.20 Multi-Agent and GPT-5.6 Luna, so we make no quality claim. Their pricing and specifications are compared on this page.
Is Grok 4.20 Multi-Agent cheaper than GPT-5.6 Luna?
GPT-5.6 Luna is cheaper: $0.225 versus $1.56 per million tokens blended at 3:1 input:output. Input alone: $1.25 vs $0.100. Output alone: $2.50 vs $0.600.
What context windows do Grok 4.20 Multi-Agent and GPT-5.6 Luna have?
Grok 4.20 Multi-Agent: 2,000,000 tokens. GPT-5.6 Luna: 1,050,000 tokens.
Who makes Grok 4.20 Multi-Agent and GPT-5.6 Luna?
Grok 4.20 Multi-Agent is made by xAI. GPT-5.6 Luna is made by OpenAI.
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