Gemini 3 Pro vs o3 Deep Research
Compare Google and OpenAI AI models
Cost Comparison (1000 input + 500 output tokens, 100 requests/day)
Gemini 3 Pro
o3 Deep Research
Cost Differences
o3 Deep Research costs more than Gemini 3 Pro
Feature Comparison
| Feature | Gemini 3 Pro | o3 Deep Research |
|---|---|---|
| Provider | OpenAI | |
| Input Price | $2.00/1M tokens | $10.00/1M tokens |
| Output Price | $12.00/1M tokens | $40.00/1M tokens |
| Context Window | 2,000,000 tokens | 200,000 tokens |
| Max Output | 131,072 tokens | 32,768 tokens |
| Category | flagship | reasoning |
| Capabilities | textvisionaudiovideocode | textreasoningvisioncode |
| Release Date | 11/18/2025 | 6/26/2025 |
Gemini 3 Pro vs o3 Deep Research: Which Should You Choose?
Choosing between Gemini 3 Pro and o3 Deep Research depends on your priorities: cost efficiency, context length, or raw capability. Gemini 3 Pro is the more affordable option at $2.00/1M input tokens — 80% cheaper than o3 Deep Research. Meanwhile, Gemini 3 Pro offers a significantly larger context window at 2,000,000 tokens vs 200,000 for o3 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 Pro is a flagship model while o3 Deep Research is reasoning. This means they're optimized for different workloads. Gemini 3 Pro is built for complex tasks that require deeper reasoning, while o3 Deep Research offers better value for routine operations.
Output costs matter too. Gemini 3 Pro charges $12.00/1M output tokens vs $40.00 for o3 Deep Research. For generation-heavy workloads (content creation, code generation, summarization), output pricing often dominates your bill. Gemini 3 Pro has the edge here at $12.00/1M output tokens.
Multimodal capabilities: Both models support vision (image understanding), so you can send images alongside text prompts with either option.
Best Use Cases
Choose Gemini 3 Pro when:
- • Budget is a primary concern
- • You need a larger context window (2,000,000 tokens)
- • You need more capabilities (audio, video)
- • You need longer outputs (up to 131,072 tokens)
- • You're already using Google's API ecosystem
Choose o3 Deep Research when:
- • 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 Pro (Google)
o3 Deep Research (OpenAI)
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