Kimi K3 vs Grok 4.7: price, context window and capabilities
Kimi K3 (moonshotai/kimi-k3) from MoonshotAI and Grok 4.7 (x-ai/grok-4.7) from SpaceXAI are both multimodal language models on the OceanToken API. Grok 4.7 costs less per token than Kimi K3: $2.00 against $3.00 per 1M input tokens (33% less) and $6.00 against $15.00 per 1M output tokens (60% less). Kimi K3 has the larger context window: 1.05M tokens (1,048,576) against 500K (500,000) for Grok 4.7. Both support tool calling, reasoning, structured outputs and image input; only Kimi K3 also lists video input; only Grok 4.7 also lists file input.
Side by side
| Spec | Kimi K3 | Grok 4.7 |
|---|---|---|
| Model | Kimi K3moonshotai/ | Grok 4.7x- |
| Publisher | MoonshotAI | SpaceXAI |
| Kind | Text, vision & video | Text & vision |
| Context window | 1.05M tokens1,048,576 | 500K tokens500,000 |
| Input price | $3.00 / 1M tokens | $2.00 / 1M tokens |
| Output price | $15.00 / 1M tokens | $6.00 / 1M tokens |
| Cached input price | $0.30 / 1M tokens | $0.50 / 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 Grok 4.7 to spend less per token: 33% less for input and 60% less for output than Kimi K3.
- Choose Kimi K3 for the longest inputs: its context window holds 1.05M tokens against 500K for Grok 4.7.
- Choose Kimi K3 if you need video input: Grok 4.7 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.
Frequently asked questions
Which is cheaper, Kimi K3 or Grok 4.7?
Grok 4.7. Grok 4.7 costs less per token than Kimi K3: $2.00 against $3.00 per 1M input tokens (33% less) and $6.00 against $15.00 per 1M output tokens (60% less). These are OceanToken starting prices per use; the OceanToken console always shows the current price.
Which has the larger context window, Kimi K3 or Grok 4.7?
Kimi K3. Kimi K3 has the larger context window: 1.05M tokens (1,048,576) against 500K (500,000) for Grok 4.7.
Can I call both Kimi K3 and Grok 4.7 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 moonshotai/kimi-k3 or x-ai/grok-4.7.
Models and publishers
Kimi K3 · Grok 4.7 · All MoonshotAI models · All SpaceXAI models
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