DeepSeek R1 vs Gemini 2.5 Flash
Complete pricing and performance comparison between DeepSeek's DeepSeek R1 and Google's Gemini 2.5 Flash.
Quick Verdict
Cheaper
Gemini 2.5 Flash
4.5x cheaper input, 2.2x cheaper output
Larger Context
Gemini 2.5 Flash
1.0M vs 128K
Higher Quality
DeepSeek R1
Score: 27 vs 21
Pricing Comparison
| Spec | DeepSeek R1 | Gemini 2.5 Flash | Difference |
|---|---|---|---|
| Provider | DeepSeek | ||
| Input / 1M tokens | $1.35 | $0.3 | Gemini 2.5 Flash is 78% more expensive |
| Output / 1M tokens | $5.4 | $2.5 | Gemini 2.5 Flash is 54% more expensive |
| Context Window | 128K | 1.0M | 8x difference |
| Max Output | 33K | 66K |
Performance Benchmarks
| Metric | DeepSeek R1 | Gemini 2.5 Flash | Winner |
|---|---|---|---|
| Quality Index | 27 | 21 | DeepSeek R1 |
| Output Speed | -- | 231 tok/s | N/A |
| Time to First Token | 0.00s | 0.42s | DeepSeek R1 |
| Value (Quality/$) | 20.1 | 68.7 | Higher = better value |
Benchmark data from Artificial Analysis. Quality Index is a composite score across reasoning, coding, and knowledge tasks.
Cost at Scale
Estimated cost at different usage levels (3:1 input-to-output token ratio, typical for chat).
| Usage | DeepSeek R1 | Gemini 2.5 Flash | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0030 | $0.0010 | Gemini 2.5 Flash saves $0.0019 |
10 requests 10K in / 3K out | $0.030 | $0.010 | Gemini 2.5 Flash saves $0.019 |
100 requests 100K in / 30K out | $0.297 | $0.105 | Gemini 2.5 Flash saves $0.192 |
1,000 requests 1M in / 300K out | $2.97 | $1.05 | Gemini 2.5 Flash saves $1.92 |
10,000 requests 10M in / 3M out | $29.70 | $10.50 | Gemini 2.5 Flash saves $19.20 |
1M requests/mo 1B in / 300M out | $2970.00 | $1050.00 | Gemini 2.5 Flash saves $1920.00 |
Pros & Cons
DeepSeek R1 Strengths
- +Higher quality score (27 vs 21)
Gemini 2.5 Flash Strengths
- +Cheaper input tokens
- +Cheaper output tokens
- +Larger context window (1.0M vs 128K)
- +Higher max output tokens
When to Use Each Model
Choose DeepSeek R1 for
- →Tasks requiring maximum accuracy and reasoning
Choose Gemini 2.5 Flash for
- →Budget-conscious projects where cost is the primary factor
- →Long documents, large codebases, or multi-turn conversations
- →Generating long-form content or detailed code
Frequently Asked Questions
Which is cheaper, DeepSeek R1 or Gemini 2.5 Flash?
For input tokens, Gemini 2.5 Flash is 4.5x cheaper at $0.3/1M tokens. For output tokens, Gemini 2.5 Flash is 2.2x cheaper at $2.5/1M tokens. At typical usage (1M input + 300K output), DeepSeek R1 costs $2.97 vs Gemini 2.5 Flash at $1.05.
What's the context window difference?
DeepSeek R1 supports 128K context (128,000 tokens), while Gemini 2.5 Flash supports 1.0M (1,048,576 tokens). Gemini 2.5 Flash can handle 8x more context in a single request.
Which model has better benchmarks?
Quality Index: DeepSeek R1 scores 27 vs Gemini 2.5 Flash at 21.
When should I choose DeepSeek R1 over Gemini 2.5 Flash?
Choose DeepSeek R1 when you need: Higher quality score (27 vs 21). Choose Gemini 2.5 Flash when you need: Cheaper input tokens, Cheaper output tokens, Larger context window (1.0M vs 128K), Higher max output tokens.
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): DeepSeek R1 = $29.70, Gemini 2.5 Flash = $10.50. At 10K input + 1K output per request (longer conversations): DeepSeek R1 = $189.00, Gemini 2.5 Flash = $55.00.
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