Grok 4.3 vs Kimi K2.6: price, context window and capabilities
Grok 4.3 (x-ai/grok-4.3) from SpaceXAI and Kimi K2.6 (moonshotai/kimi-k2.6) from MoonshotAI are both multimodal language models on the OceanToken API. Grok 4.3 costs less for output: $2.50 against $4.00 per 1M output tokens (38% less); Kimi K2.6 costs less for input: $0.95 against $1.25 per 1M input tokens (24% less). Grok 4.3 has the larger context window: 1M tokens (1,000,000) against 262K (262,144) for Kimi K2.6. Both support tool calling, reasoning, structured outputs and image input; only Grok 4.3 also lists file input.
Side by side
| Spec | Grok 4.3 | Kimi K2.6 |
|---|---|---|
| Model | Grok 4.3x- | Kimi K2.6moonshotai/ |
| Publisher | SpaceXAI | MoonshotAI |
| Kind | Text & vision | Text & vision |
| Context window | 1M tokens1,000,000 | 262K tokens262,144 |
| Input price | $1.25 / 1M tokens | $0.95 / 1M tokens |
| Output price | $2.50 / 1M tokens | $4.00 / 1M tokens |
| Cached input price | $0.20 / 1M tokens | $0.16 / 1M tokens |
| Web search price | $0.005 / search | – |
| Inputs | text, images and files | text and images |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Price depends on the mix: Grok 4.3 costs less for output and Kimi K2.6 for input, so estimate both on your own volume of input tokens and output tokens.
- Choose Grok 4.3 for the longest inputs: its context window holds 1M tokens against 262K for Kimi K2.6.
- Choose Grok 4.3 if you need file input: Kimi K2.6 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 Grok 4.3 Kimi K2.6
Frequently asked questions
Which is cheaper, Grok 4.3 or Kimi K2.6?
It depends on the mix of tokens. Grok 4.3 costs less for output: $2.50 against $4.00 per 1M output tokens (38% less); Kimi K2.6 costs less for input: $0.95 against $1.25 per 1M input tokens (24% less). These are OceanToken starting prices per use; the OceanToken console always shows the current price.
Which has the larger context window, Grok 4.3 or Kimi K2.6?
Grok 4.3. Grok 4.3 has the larger context window: 1M tokens (1,000,000) against 262K (262,144) for Kimi K2.6.
Can I call both Grok 4.3 and Kimi K2.6 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 x-ai/grok-4.3 or moonshotai/kimi-k2.6.
Models and publishers
Grok 4.3 · Kimi K2.6 · All SpaceXAI models · All MoonshotAI models
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