Qwen3.8 Flash vs Gemini 3.1 Pro Preview: price, context window and capabilities
Qwen3.8 Flash (qwen/qwen3.8-flash) from Qwen and Gemini 3.1 Pro Preview (google/gemini-3.1-pro-preview) from Google are both multimodal language models on the OceanToken API. Qwen3.8 Flash costs less per token than Gemini 3.1 Pro Preview: $0.143 against $1.80 per 1M input tokens (92% less) and $0.447 against $10.80 per 1M output tokens (96% less). Gemini 3.1 Pro Preview is 10% off its official price on OceanToken, for every account. Gemini 3.1 Pro Preview has the larger context window: 1.05M tokens (1,048,576) against 984K (983,616) for Qwen3.8 Flash. Both support tool calling, reasoning, structured outputs, image input and video input; only Gemini 3.1 Pro Preview also lists file input and audio input.
Side by side
| Spec | Qwen3.8 Flash −25% | Gemini 3.1 Pro Preview −10% |
|---|---|---|
| Model | Qwen3.8 Flashqwen/ | Gemini 3.1 Pro Previewgoogle/ |
| Publisher | Qwen | |
| Kind | Text, vision & video | Text, vision, audio & video |
| Context window | 984K tokens983,616 | 1.05M tokens1,048,576 |
| Input price | $0.143 / 1M tokens | $1.80 / 1M tokens |
| Output price | $0.447 / 1M tokens | $10.80 / 1M tokens |
| Cached input price | $0.016 / 1M tokens | $0.20 / 1M tokens |
| Cache write price | $0.20 / 1M tokens | $2.375 / 1M tokens |
| Web search price | – | $0.014 / search |
| Discount (vs official, top tier) | −25% | −10% |
| Inputs | text, images and video | text, images, files, audio and video |
| Outputs | text | text |
| Tool calling | Yes | Yes |
| Reasoning | Yes | Yes |
| Structured outputs | Yes | Yes |
About these prices
Which should you choose?
- Choose Qwen3.8 Flash to spend less per token: 92% less for input and 96% less for output than Gemini 3.1 Pro Preview.
- Choose Gemini 3.1 Pro Preview for the longest inputs: its context window holds 1.05M tokens against 984K for Qwen3.8 Flash.
- Choose Gemini 3.1 Pro Preview if you need file input and audio input: Qwen3.8 Flash 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 Qwen3.8 Flash Gemini 3.1 Pro Preview
Frequently asked questions
Which is cheaper, Qwen3.8 Flash or Gemini 3.1 Pro Preview?
Qwen3.8 Flash. Qwen3.8 Flash costs less per token than Gemini 3.1 Pro Preview: $0.143 against $1.80 per 1M input tokens (92% less) and $0.447 against $10.80 per 1M output tokens (96% less). Gemini 3.1 Pro Preview 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, Qwen3.8 Flash or Gemini 3.1 Pro Preview?
Gemini 3.1 Pro Preview. Gemini 3.1 Pro Preview has the larger context window: 1.05M tokens (1,048,576) against 984K (983,616) for Qwen3.8 Flash.
Can I call both Qwen3.8 Flash and Gemini 3.1 Pro Preview 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 qwen/qwen3.8-flash or google/gemini-3.1-pro-preview.
Models and publishers
Qwen3.8 Flash · Gemini 3.1 Pro Preview · All Qwen models · All Google models
More comparisons
Gemini 3.1 Pro Preview vs GPT-6 Sol · Qwen3.8 Flash vs DeepSeek V4.1 Flash · DeepSeek V3.2 vs Gemini 3.1 Pro Preview · GLM 5.3 Prime vs Gemini 3.1 Pro Preview · All comparisons