Grok 4.3 vs Mistral Medium 3.5: price, context window and capabilities
Grok 4.3 (x-ai/grok-4.3) from SpaceXAI and Mistral Medium 3.5 (mistralai/mistral-medium-3-5) from Mistral are both multimodal language models on the OceanToken API. Grok 4.3 costs less per token than Mistral Medium 3.5: $1.25 against $1.50 per 1M input tokens (17% less) and $2.50 against $7.50 per 1M output tokens (67% less). Grok 4.3 has the larger context window: 1M tokens (1,000,000) against 262K (262,144) for Mistral Medium 3.5. Both support tool calling, reasoning, structured outputs, image input and file input.
Side by side
| Spec | Grok 4.3 | Mistral Medium 3.5 |
|---|---|---|
| Model | Grok 4.3x- | Mistral Medium 3.5mistralai/ |
| Publisher | SpaceXAI | Mistral |
| Kind | Text & vision | Text & vision |
| Context window | 1M tokens1,000,000 | 262K tokens262,144 |
| Input price | $1.25 / 1M tokens | $1.50 / 1M tokens |
| Output price | $2.50 / 1M tokens | $7.50 / 1M tokens |
| Cached input price | $0.20 / 1M tokens | – |
| Web search price | $0.005 / search | – |
| Inputs | text, images and files | 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 4.3 to spend less per token: 17% less for input and 67% less for output than Mistral Medium 3.5.
- Choose Grok 4.3 for the longest inputs: its context window holds 1M tokens against 262K for Mistral Medium 3.5.
- Both list the same capabilities: tool calling, reasoning, structured outputs, image input and file input.
- 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 Mistral Medium 3.5
Frequently asked questions
Which is cheaper, Grok 4.3 or Mistral Medium 3.5?
Grok 4.3. Grok 4.3 costs less per token than Mistral Medium 3.5: $1.25 against $1.50 per 1M input tokens (17% less) and $2.50 against $7.50 per 1M output tokens (67% 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 Mistral Medium 3.5?
Grok 4.3. Grok 4.3 has the larger context window: 1M tokens (1,000,000) against 262K (262,144) for Mistral Medium 3.5.
Can I call both Grok 4.3 and Mistral Medium 3.5 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 x-ai/grok-4.3 or mistralai/mistral-medium-3-5.
Models and publishers
Grok 4.3 · Mistral Medium 3.5 · All SpaceXAI models · All Mistral models
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