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Gemini 2.5 Flash vs DeepSeek R1
A detailed comparison of Gemini 2.5 Flash (Google) and DeepSeek R1 (DeepSeek) across pricing, performance, and features.
Pricing Comparison
| Metric | Gemini 2.5 Flash | DeepSeek R1 | Difference |
|---|---|---|---|
| Input / 1M tokens | $0.15 | $0.55 | +267% |
| Output / 1M tokens | $0.60 | $2.19 | +265% |
| Context window | 1M | 128K | — |
| Max output | 65.536K | 64K | — |
Benchmark Comparison
| Benchmark | Gemini 2.5 Flash | DeepSeek R1 |
|---|---|---|
| MMLU-Pro | 76% | 84% |
| HumanEval | 89.5% | 92% |
| GPQA | — | 71.5% |
Capabilities
| Capability | Gemini 2.5 Flash | DeepSeek R1 |
|---|---|---|
| code | ✓ | ✓ |
| reasoning | ✓ | ✓ |
| text | ✓ | ✓ |
| tool-use | ✓ | ✗ |
| vision | ✓ | ✗ |
Gemini 2.5 Flash Strengths
- ✓One of the cheapest models available
- ✓1M context at budget pricing
- ✓Free tier available
Gemini 2.5 Flash Weaknesses
- ✗Weaker than Flash 3 on most benchmarks
- ✗Output quality inconsistent on edge cases
DeepSeek R1 Strengths
- ✓Cheapest reasoning model available
- ✓Strong math and science performance
- ✓Open-source with off-peak discounts
DeepSeek R1 Weaknesses
- ✗Slower than non-reasoning models
- ✗No vision or tool-use
- ✗China-based — availability concerns
Quick Verdict
Best value: Gemini 2.5 Flash is the more affordable option at $0.15/$0.6 per 1M tokens.
Higher benchmarks: Gemini 2.5 Flash scores higher on average across available benchmarks (82.8% avg).
Larger context: Gemini 2.5 Flash supports 1M tokens.
Choose Gemini 2.5 Flash if cost matters most. Choose DeepSeek R1 if you need the best possible quality for complex tasks.