Rate
GPT-5.6 Luna vs Grok 4.7: price
GPT-5.6 Luna is 6.7× cheaper than Grok 4.7 for a typical chat workload (1,500 tokens in, 500 out).
| Item | GPT-5.6 Luna | Grok 4.7 |
|---|---|---|
| Input per 1M tokens | $0.20 | $2.00 |
| Output per 1M tokens | $1.20 | $6.00 |
| Cached input per 1M | $0.02 | – |
| 1,000 chat messages1,500 tokens in, 500 out each | $0.90 | $6.00 |
| Summarize a 50-page PDF30,000 tokens in, 1,000 out | $0.0072 | $0.066 |
| One coding-agent task60,000 tokens in, 4,000 out, no caching | $0.017 | $0.144 |
List prices checked September 28, 2026. Price is half the story: see how people rate each one today.
GPT-5.6 Luna vs Grok 4.7 in numbers
Output, usually the bigger part of the bill, costs $1.20 on GPT-5.6 Luna and $6.00 on Grok 4.7, so GPT-5.6 Luna is 5.0× cheaper there. Input costs $0.20 versus $2.00 per million tokens. For a coding-agent task (60,000 tokens in, 4,000 out) that is $0.017 on GPT-5.6 Luna and $0.144 on Grok 4.7. GPT-5.6 Luna accepts 1.05M tokens of context and Grok 4.7 500K tokens. GPT-5.6 Luna came out on July 9, 2026 and Grok 4.7 on September 21, 2026.
GPT-5.6 Luna is made by OpenAI; Grok 4.7 by xAI. Estimate your own bill for both in the cost calculator.
Which one feels dumber today?
- GPT-5.6 LunaOpenAI
–no votes yet - Grok 4.7xAI–no votes yet
Frequently asked questions
Is GPT-5.6 Luna or Grok 4.7 cheaper?
GPT-5.6 Luna is 6.7× cheaper than Grok 4.7 for a typical chat workload (1,500 tokens in, 500 out). Output, usually the bigger part of the bill, costs $1.20 on GPT-5.6 Luna and $6.00 on Grok 4.7, so GPT-5.6 Luna is 5.0× cheaper there.
Which is better, GPT-5.6 Luna or Grok 4.7?
It depends on the task, and price is only part of it. Check how people rate each one today on the GPT-5.6 Luna and Grok 4.7 pages, and read what users report in Discussions.