Model comparison
Gemini 3.1 Pro Preview vs DeepSeek V4 Flash
Compare Gemini 3.1 Pro Preview vs DeepSeek V4 Flash API pricing: input/output token costs, cache pricing, context windows, workload estimates, and routing fit.
Gemini 3.1 Pro Preview
gemini · gemini-3.1-pro-preview
- Input
- $2
- Output
- $12
- Context
- 1M
DeepSeek V4 Flash
deepseek · deepseek-v4-flash
- Input
- $0.14
- Output
- $0.28
- Context
- 1M
Quick take
DeepSeek V4 Flash has the lower input price at $0.14 per 1M input tokens. DeepSeek V4 Flash is cheaper for the example blended workload below. Gemini 3.1 Pro Preview has the larger context window at 1M tokens.
Choose Gemini 3.1 Pro Preview if...
- Gemini 3.1 Pro Preview is safer for long documents, repository analysis, and RAG prompts because it has the larger context window.
- Gemini 3.1 Pro Preview is required if images, screenshots, or visual documents are part of the workflow.
Choose DeepSeek V4 Flash if...
- DeepSeek V4 Flash is the better default for cost-sensitive traffic and repeated high-volume calls.
- DeepSeek V4 Flash gives more room for long generated answers, reports, or code output.
Example workload cost
Estimates use input tokens plus 20% output tokens. They exclude provider discounts, cache hits, and tool/search surcharges.
| Workload | Gemini 3.1 Pro Preview | DeepSeek V4 Flash | Cheaper |
|---|---|---|---|
| 1M input + 200K output | $4.40 | $0.20 | DeepSeek V4 Flash |
| 10M input + 2M output | $44.00 | $1.96 | DeepSeek V4 Flash |
| 100M input + 20M output | $440.00 | $19.60 | DeepSeek V4 Flash |
Context, output, and capability fit
Gemini 3.1 Pro Preview provides the larger context window. Check max output separately when the task needs long reports, code generation, or full-document rewrites.
- Gemini 3.1 Pro Preview max output
- 65.5K
- DeepSeek V4 Flash max output
- 384K
- Gemini 3.1 Pro Preview features
- prompt caching, function calling, vision
- DeepSeek V4 Flash features
- prompt caching, function calling
Risk notes for Gemini 3.1 Pro Preview
- Preview or beta model: verify availability and pricing before production rollout.
Risk notes for DeepSeek V4 Flash
- No major capability risk is flagged in this snapshot, but provider pages should still be verified before production routing.
Routing tags
frontierpreviewreasoninglong-contextmultimodalenterprise-ragragbudgethigh-volumecodingopen-weightcache-friendlylocal-open