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Gemini 3 Flash vs GPT-5
A detailed comparison of Gemini 3 Flash (Google) and GPT-5 (OpenAI) across pricing, performance, and features.
Pricing Comparison
| Metric | Gemini 3 Flash | GPT-5 | Difference |
|---|---|---|---|
| Input / 1M tokens | $0.50 | $1.25 | +150% |
| Output / 1M tokens | $3.00 | $10.00 | +233% |
| Context window | 1M | 128K | — |
| Max output | 65.536K | 16.384K | — |
Benchmark Comparison
| Benchmark | Gemini 3 Flash | GPT-5 |
|---|---|---|
| MMLU-Pro | 78% | 88.5% |
| HumanEval | 90% | 95% |
| GPQA | — | 73.5% |
Capabilities
| Capability | Gemini 3 Flash | GPT-5 |
|---|---|---|
| audio | ✗ | ✓ |
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✓ |
| vision | ✓ | ✓ |
Gemini 3 Flash Strengths
- ✓1M context at budget pricing
- ✓Very fast
- ✓Free tier available via Google AI Studio
Gemini 3 Flash Weaknesses
- ✗Less capable than Pro on complex reasoning
- ✗Audio input priced separately ($1/1M)
GPT-5 Strengths
- ✓Strong all-around performance
- ✓Good price for flagship tier
- ✓Multimodal including audio
GPT-5 Weaknesses
- ✗128K context vs 200K+ for newer models
- ✗Codex variants better for pure coding
Quick Verdict
Best value: Gemini 3 Flash is the more affordable option at $0.5/$3 per 1M tokens.
Higher benchmarks: GPT-5 scores higher on average across available benchmarks (85.7% avg).
Larger context: Gemini 3 Flash supports 1M tokens.
Choose Gemini 3 Flash if cost matters most. Choose GPT-5 if you need the best possible quality for complex tasks.