token.app › Compare › GPT-5.6 Luna Pro vs Grok 4.5

GPT-5.6 Luna Pro vs Grok 4.5

GPT-5.6 Luna Pro is 13× cheaper per token on a blended 3:1 basis. GPT-5.6 Luna Pro accepts the larger context window (1.1M).

Head to head
Blended price uses a 3:1 input:output mix
GPT-5.6 Luna ProGrok 4.5
ProviderOpenAIxAI
Input $/1M$0.100$2.00
Output $/1M$0.600$6.00
Blended $/1M$0.225$3.00
Context window1.1M500K
Max output128K
ReleasedJul 2026Jul 2026
LicenceProprietaryProprietary
Choose GPT-5.6 Luna Pro if…
  • Costs less per token — $0.225 vs $3.00 blended
  • Larger context window (1.1M)
  • Newer model (released Jul 2026)
Choose Grok 4.5 if…
  • No clear advantage on the data we hold.
FAQ
Which is better, GPT-5.6 Luna Pro or Grok 4.5?
We do not hold independently-run benchmark scores covering both GPT-5.6 Luna Pro and Grok 4.5, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-5.6 Luna Pro cheaper than Grok 4.5?
GPT-5.6 Luna Pro is cheaper: $0.225 versus $3.00 per million tokens blended at 3:1 input:output. Input alone: $0.100 vs $2.00. Output alone: $0.600 vs $6.00.
What context windows do GPT-5.6 Luna Pro and Grok 4.5 have?
GPT-5.6 Luna Pro: 1,050,000 tokens. Grok 4.5: 500,000 tokens.
Who makes GPT-5.6 Luna Pro and Grok 4.5?
GPT-5.6 Luna Pro is made by OpenAI. Grok 4.5 is made by xAI.
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