GPT-5.6 Luna vs MiniMax M3
OpenAI against MiniMax, costed on the same three workloads. GPT-5.6 Luna is cheaper on all three workloads.
Monthly bill, side by side
| Workload | GPT-5.6 Luna | MiniMax M3 | Difference |
|---|---|---|---|
| Support chatbot 2,500 six-turn conversations a day |
$887 | $1,087 | $200 (+23%) |
| Document summariser 1,000 single-shot summaries a day |
$102 | $139 | $36.60 (+36%) |
| Coding agent 200 twelve-turn sessions a day |
$598 | $788 | $191 (+32%) |
No prompt caching and no batch discount on either side, so the comparison is like for like. Both figures assume 30 days a month.
The rate cards
| GPT-5.6 Luna | MiniMax M3 | |
|---|---|---|
| Input, per 1M tokens | $0.2 | $0.3 |
| Output, per 1M tokens | $1.2 | $1.2 |
| Cached input | $0.02 | $0.06 |
| Context window | 1.05M | 1M |
| Maximum output | 128K | 128K |
| Reasoning model | yes | yes |
| Vision | yes | no |
Run this comparison on your own numbers
Full detail: GPT-5.6 Luna pricing · MiniMax M3 pricing