Gemini 3.8 Flash vs DeepSeek V4 Flash
How Google AI's Gemini 3.8 Flash and DeepSeek's DeepSeek V4 Flash differ on paper, from the specs each provider publishes.
Compare them on your promptBoth answer side by side, free with your own API keys.
Key differences
- Gemini 3.8 Flash accepts a larger context window: 1.05M tokens versus 1M for DeepSeek V4 Flash.
- DeepSeek V4 Flash can write longer replies, up to 384K output tokens against 66K.
- Gemini 3.8 Flash is the newer release (September 2026); DeepSeek V4 Flash came out in July 2026.
- Gemini 3.8 Flash lists image input support that DeepSeek V4 Flash does not.
- DeepSeek V4 Flash lists extended thinking support that Gemini 3.8 Flash does not.
Side by side
| Spec | Gemini 3.8 Flash | DeepSeek V4 Flash |
|---|---|---|
| Provider | Google AI | DeepSeek |
| Released | September 2026 | July 2026 |
| Context window | 1.05M tokens | 1M tokens |
| Max output | 66K tokens | 384K tokens |
| Reasoning model | Yes | Yes |
| Price per 1M tokens (in / out) | See provider | See provider |
| Capabilities | Image input, Reasoning, Coding, Tool calling, Structured output, Streaming | Reasoning, Coding, Tool calling, Structured output, Extended thinking, Streaming |
Specs as published by each provider. Benchmarks and output quality aren't covered here; the best test is your own prompts.
Specs only go so far. Ask both.
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