MiniMax M3 vs Grok 4.5: price, context window and capabilities
MiniMax M3 (minimax/minimax-m3) from MiniMax and Grok 4.5 (x-ai/grok-4.5) from SpaceXAI are both multimodal language models on the OceanToken API. MiniMax M3 costs less per token than Grok 4.5: $0.30 against $2.00 per 1M input tokens (85% less) and $1.20 against $6.00 per 1M output tokens (80% less). MiniMax M3 has the larger context window: 524K tokens (524,288) against 500K (500,000) for Grok 4.5. Both support tool calling, reasoning, structured outputs and image input; only MiniMax M3 also lists video input; only Grok 4.5 also lists file input.
Side by side
| Spec | MiniMax M3 | Grok 4.5 |
|---|---|---|
| Model | MiniMax M3minimax/ | Grok 4.5x- |
| Publisher | MiniMax | SpaceXAI |
| Kind | Text, vision & video | Text & vision |
| Context window | 524K tokens524,288 | 500K tokens500,000 |
| Input price | $0.30 / 1M tokens | $2.00 / 1M tokens |
| Output price | $1.20 / 1M tokens | $6.00 / 1M tokens |
| Cached input price | $0.06 / 1M tokens | $0.30 / 1M tokens |
| Web search price | – | $0.005 / 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 MiniMax M3 to spend less per token: 85% less for input and 80% less for output than Grok 4.5.
- Choose MiniMax M3 for the longest inputs: its context window holds 524K tokens against 500K for Grok 4.5.
- Choose MiniMax M3 if you need video input: Grok 4.5 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 Grok 4.5
Frequently asked questions
Which is cheaper, MiniMax M3 or Grok 4.5?
MiniMax M3. MiniMax M3 costs less per token than Grok 4.5: $0.30 against $2.00 per 1M input tokens (85% less) and $1.20 against $6.00 per 1M output tokens (80% 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 Grok 4.5?
MiniMax M3. MiniMax M3 has the larger context window: 524K tokens (524,288) against 500K (500,000) for Grok 4.5.
Can I call both MiniMax M3 and Grok 4.5 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 x-ai/grok-4.5.
Models and publishers
MiniMax M3 · Grok 4.5 · All MiniMax models · All SpaceXAI models
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