Gemini 3.1 Flash-Lite Preview vs o4-mini Deep Research
Compare Google and OpenAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Gemini 3.1 Flash-Lite Preview
o4-mini Deep Research
Cost Differences
o4-mini Deep Research costs more than Gemini 3.1 Flash-Lite Preview
Feature Comparison
| Feature | Gemini 3.1 Flash-Lite Preview | o4-mini Deep Research |
|---|---|---|
| Provider | OpenAI | |
| Input Price | $0.25/1M tokens | $2.00/1M tokens |
| Output Price | $1.50/1M tokens | $8.00/1M tokens |
| Context Window | 1,000,000 tokens | 200,000 tokens |
| Max Output | 8,192 tokens | 32,768 tokens |
| Category | efficient | reasoning |
| Capabilities | textvisioncode | textreasoningcode |
| Release Date | 3/3/2026 | 6/26/2025 |
Gemini 3.1 Flash-Lite Preview vs o4-mini Deep Research: Which Should You Choose?
Choosing between Gemini 3.1 Flash-Lite Preview and o4-mini Deep Research depends on your priorities: cost efficiency, context length, or raw capability. Gemini 3.1 Flash-Lite Preview is the more affordable option at $0.25/1M input tokens — 88% cheaper than o4-mini Deep Research. Meanwhile, Gemini 3.1 Flash-Lite Preview offers a significantly larger context window at 1,000,000 tokens vs 200,000 for o4-mini Deep Research.
These models come from different providers — Google and OpenAI — which means different API ecosystems, SDKs, rate limits, and terms of service. If you're already integrated with Google, switching to OpenAIinvolves migration effort beyond just pricing. Factor in your existing infrastructure when deciding.
These models target different tiers: Gemini 3.1 Flash-Lite Preview is a efficient model while o4-mini Deep Research is reasoning. This means they're optimized for different workloads. o4-mini Deep Research targets more demanding workloads, while Gemini 3.1 Flash-Lite Preview provides a cost-effective option for everyday tasks.
Output costs matter too. Gemini 3.1 Flash-Lite Preview charges $1.50/1M output tokens vs $8.00 for o4-mini Deep Research. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Gemini 3.1 Flash-Lite Preview has the edge here at $1.50/1M output tokens.
Multimodal capabilities: Gemini 3.1 Flash-Lite Preview supports vision (image inputs) while o4-mini Deep Research is text-only. If your application needs image understanding, this narrows your choice.
Best Use Cases
Choose Gemini 3.1 Flash-Lite Preview when:
- • Budget is a primary concern
- • You need a larger context window (1,000,000 tokens)
- • You're already using Google's API ecosystem
- • You're running high-volume, latency-sensitive workloads
Choose o4-mini Deep Research when:
- • You need longer outputs (up to 32,768 tokens)
- • You're already using OpenAI's API ecosystem
Try Different Scenarios
Use the calculator below to see how costs change with different usage patterns
Gemini 3.1 Flash-Lite Preview (Google)
o4-mini Deep Research (OpenAI)
Start using Gemini 3.1 Flash-Lite Preview today
Sign Up for Google →Start using o4-mini Deep Research today
Sign Up for OpenAI →