Gemini 3.8 Flash vs Grok 4.7: price, context window and capabilities
Gemini 3.8 Flash (google/gemini-3.8-flash) from Google and Grok 4.7 (x-ai/grok-4.7) from SpaceXAI are both multimodal language models on the OceanToken API. Gemini 3.8 Flash costs less per token than Grok 4.7: $0.675 against $2.00 per 1M input tokens (66% less) and $3.375 against $6.00 per 1M output tokens (44% less). Gemini 3.8 Flash is 10% off its official price on OceanToken, for every account. Gemini 3.8 Flash 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, image input and file input; only Gemini 3.8 Flash also lists audio input and video input.
Side by side
| Spec | Gemini 3.8 Flash −10% | Grok 4.7 |
|---|---|---|
| Model | Gemini 3.8 Flashgoogle/ | Grok 4.7x- |
| Publisher | SpaceXAI | |
| Kind | Text, vision, audio & video | Text & vision |
| Context window | 1.05M tokens1,048,576 | 500K tokens500,000 |
| Input price | $0.675 / 1M tokens | $2.00 / 1M tokens |
| Output price | $3.375 / 1M tokens | $6.00 / 1M tokens |
| Cached input price | $0.075 / 1M tokens | $0.50 / 1M tokens |
| Cache write price | $0.792 / 1M tokens | – |
| Web search price | $0.014 / search | $0.005 / search |
| Discount (vs official, top tier) | −10% | — |
| Inputs | text, images, files, audio 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 Gemini 3.8 Flash to spend less per token: 66% less for input and 44% less for output than Grok 4.7.
- Choose Gemini 3.8 Flash for the longest inputs: its context window holds 1.05M tokens against 500K for Grok 4.7.
- Choose Gemini 3.8 Flash if you need audio input and video input: Grok 4.7 does not list them.
- 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 Gemini 3.8 Flash Grok 4.7
Frequently asked questions
Which is cheaper, Gemini 3.8 Flash or Grok 4.7?
Gemini 3.8 Flash. Gemini 3.8 Flash costs less per token than Grok 4.7: $0.675 against $2.00 per 1M input tokens (66% less) and $3.375 against $6.00 per 1M output tokens (44% less). Gemini 3.8 Flash is 10% off its official price on OceanToken, for every account. The OceanToken console always shows the current price.
Which has the larger context window, Gemini 3.8 Flash or Grok 4.7?
Gemini 3.8 Flash. Gemini 3.8 Flash has the larger context window: 1.05M tokens (1,048,576) against 500K (500,000) for Grok 4.7.
Can I call both Gemini 3.8 Flash 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 google/gemini-3.8-flash or x-ai/grok-4.7.
Models and publishers
Gemini 3.8 Flash · Grok 4.7 · All Google models · All SpaceXAI models
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