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GPT-4o Mini vs Gemini 3 Pro
A detailed comparison of GPT-4o Mini (OpenAI) and Gemini 3 Pro (Google) across pricing, performance, and features.
Pricing Comparison
| Metric | GPT-4o Mini | Gemini 3 Pro | Difference |
|---|---|---|---|
| Input / 1M tokens | $0.15 | $2.00 | +1233% |
| Output / 1M tokens | $0.60 | $12.00 | +1900% |
| Context window | 128K | 1M | — |
| Max output | 16.384K | 65.536K | — |
Benchmark Comparison
| Benchmark | GPT-4o Mini | Gemini 3 Pro |
|---|---|---|
| MMLU-Pro | 68% | 89.8% |
| HumanEval | 87.2% | 94% |
| GPQA | — | 77% |
Capabilities
| Capability | GPT-4o Mini | Gemini 3 Pro |
|---|---|---|
| audio | ✗ | ✓ |
| code | ✓ | ✓ |
| reasoning | ✗ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
GPT-4o Mini Strengths
- ✓Extremely cheap
- ✓Fast responses
- ✓Good enough for many production tasks
GPT-4o Mini Weaknesses
- ✗Weaker reasoning than full models
- ✗Can hallucinate more on complex topics
Gemini 3 Pro Strengths
- ✓Stable and well-tested
- ✓1M token context window
- ✓Strong multimodal with audio
Gemini 3 Pro Weaknesses
- ✗Being superseded by 3.1 Pro
- ✗Context-tiered pricing ($4/$18 above 200K)
Quick Verdict
Best value: GPT-4o Mini is the more affordable option at $0.15/$0.6 per 1M tokens.
Higher benchmarks: Gemini 3 Pro scores higher on average across available benchmarks (86.9% avg).
Larger context: Gemini 3 Pro supports 1M tokens.
Choose GPT-4o Mini if cost matters most. Choose Gemini 3 Pro if you need the best possible quality for complex tasks.