token.app › Compare › GPT-6 Luna vs Mercury 3
GPT-6 Luna vs Mercury 3
Mercury 3 is 1.2× cheaper per token on a blended 3:1 basis. GPT-6 Luna accepts the larger context window (1.1M).
Head to head
Blended price uses a 3:1 input:output mix
| GPT-6 Luna | Mercury 3 | |
|---|---|---|
| Provider | OpenAI | Inception |
| Input $/1M | $0.100 | $0.100 |
| Output $/1M | $0.500 | $0.350 |
| Blended $/1M | $0.200 | $0.163 |
| Context window | 1.1M | 1M |
| Max output | 128K | 131K |
| Released | Sep 2026 | Oct 2026 |
| Licence | Proprietary | Proprietary |
Choose GPT-6 Luna if…
- Larger context window (1.1M)
Choose Mercury 3 if…
- Costs less per token — $0.163 vs $0.200 blended
- Newer model (released Oct 2026)
FAQ
Which is better, GPT-6 Luna or Mercury 3?
We do not hold independently-run benchmark scores covering both GPT-6 Luna and Mercury 3, so we make no quality claim. Their pricing and specifications are compared on this page.
Is GPT-6 Luna cheaper than Mercury 3?
Mercury 3 is cheaper: $0.163 versus $0.200 per million tokens blended at 3:1 input:output. Input alone: $0.100 vs $0.100. Output alone: $0.500 vs $0.350.
What context windows do GPT-6 Luna and Mercury 3 have?
GPT-6 Luna: 1,050,000 tokens. Mercury 3: 1,000,000 tokens.
Who makes GPT-6 Luna and Mercury 3?
GPT-6 Luna is made by OpenAI. Mercury 3 is made by Inception.