MiniMax M3 vs GPT-6 Luna Pro: price, context window and capabilities
MiniMax M3 (minimax/minimax-m3) from MiniMax and GPT-6 Luna Pro (openai/gpt-6-luna-pro) from OpenAI are both multimodal language models on the OceanToken API. GPT-6 Luna Pro costs less per token than MiniMax M3: $0.10 against $0.30 per 1M input tokens (67% less) and $0.50 against $1.20 per 1M output tokens (58% less). GPT-6 Luna Pro has the larger context window: 1.05M tokens (1,050,000) against 524K (524,288) for MiniMax M3. Both support tool calling, reasoning, structured outputs and image input; only MiniMax M3 also lists video input; only GPT-6 Luna Pro also lists file input.
Side by side
| Spec | MiniMax M3 | GPT-6 Luna Pro |
|---|---|---|
| Model | MiniMax M3minimax/ | GPT-6 Luna Proopenai/ |
| Publisher | MiniMax | OpenAI |
| Kind | Text, vision & video | Text & vision |
| Context window | 524K tokens524,288 | 1.05M tokens1,050,000 |
| Input price | $0.30 / 1M tokens | $0.10 / 1M tokens |
| Output price | $1.20 / 1M tokens | $0.50 / 1M tokens |
| Cached input price | $0.06 / 1M tokens | $0.01 / 1M tokens |
| Cache write price | – | $0.125 / 1M tokens |
| Web search price | – | $0.01 / search |
| Inputs | text, images and video | text, images and files |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Choose GPT-6 Luna Pro to spend less per token: 67% less for input and 58% less for output than MiniMax M3.
- Choose GPT-6 Luna Pro for the longest inputs: its context window holds 1.05M tokens against 524K for MiniMax M3.
- Choose MiniMax M3 if you need video input: GPT-6 Luna Pro does not list it.
- Not sure? Call both with the same OceanToken API key and compare them on your own prompts; each request is billed per use from one prepaid balance.
Get API Key MiniMax M3 GPT-6 Luna Pro
Frequently asked questions
Which is cheaper, MiniMax M3 or GPT-6 Luna Pro?
GPT-6 Luna Pro. GPT-6 Luna Pro costs less per token than MiniMax M3: $0.10 against $0.30 per 1M input tokens (67% less) and $0.50 against $1.20 per 1M output tokens (58% less). These are OceanToken starting prices per use; the OceanToken console always shows the current price.
Which has the larger context window, MiniMax M3 or GPT-6 Luna Pro?
GPT-6 Luna Pro. GPT-6 Luna Pro has the larger context window: 1.05M tokens (1,050,000) against 524K (524,288) for MiniMax M3.
Can I call both MiniMax M3 and GPT-6 Luna Pro with one API key?
Yes. Both are on the OceanToken API at https://api.oceantoken.ai/v1: one API key and one prepaid balance call either model. Send the model id minimax/minimax-m3 or openai/gpt-6-luna-pro.
Models and publishers
MiniMax M3 · GPT-6 Luna Pro · All MiniMax models · All OpenAI models
More comparisons
MiniMax M3 vs DeepSeek V4.1 Flash · DeepSeek V4.1 Flash vs GPT-6 Luna Pro · DeepSeek V4 Pro vs GPT-6 Luna Pro · DeepSeek V3.2 vs GPT-6 Luna Pro · All comparisons