Gemini 2.5 Pro vs Qwen 3.5 397B
Complete pricing and performance comparison between Google's Gemini 2.5 Pro and Alibaba's Qwen 3.5 397B.
Quick Verdict
Cheaper
Qwen 3.5 397B
2.1x cheaper input, 2.8x cheaper output
Larger Context
Gemini 2.5 Pro
1.0M vs 128K
Pricing Comparison
| Spec | Gemini 2.5 Pro | Qwen 3.5 397B | Difference |
|---|---|---|---|
| Provider | Alibaba | ||
| Input / 1M tokens | $1.25 | $0.6 | Qwen 3.5 397B is 52% more expensive |
| Output / 1M tokens | $10 | $3.6 | Qwen 3.5 397B is 64% more expensive |
| Context Window | 1.0M | 128K | 8x difference |
| Max Output | 66K | 33K |
Performance Benchmarks
| Metric | Gemini 2.5 Pro | Qwen 3.5 397B | Winner |
|---|---|---|---|
| Quality Index | 35 | -- | N/A |
| Output Speed | 128 tok/s | -- | N/A |
| Value (Quality/$) | 27.7 | -- | 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 | Gemini 2.5 Pro | Qwen 3.5 397B | Savings |
|---|---|---|---|
Single request 1K in / 300 out | $0.0042 | $0.0017 | Qwen 3.5 397B saves $0.0026 |
10 requests 10K in / 3K out | $0.042 | $0.017 | Qwen 3.5 397B saves $0.026 |
100 requests 100K in / 30K out | $0.425 | $0.168 | Qwen 3.5 397B saves $0.257 |
1,000 requests 1M in / 300K out | $4.25 | $1.68 | Qwen 3.5 397B saves $2.57 |
10,000 requests 10M in / 3M out | $42.50 | $16.80 | Qwen 3.5 397B saves $25.70 |
1M requests/mo 1B in / 300M out | $4250.00 | $1680.00 | Qwen 3.5 397B saves $2570.00 |
Pros & Cons
Gemini 2.5 Pro Strengths
- +Larger context window (1.0M vs 128K)
- +Higher max output tokens
Qwen 3.5 397B Strengths
- +Cheaper input tokens
- +Cheaper output tokens
When to Use Each Model
Choose Gemini 2.5 Pro for
- →Long documents, large codebases, or multi-turn conversations
- →Generating long-form content or detailed code
Choose Qwen 3.5 397B for
- →Budget-conscious projects where cost is the primary factor
Frequently Asked Questions
Which is cheaper, Gemini 2.5 Pro or Qwen 3.5 397B?
For input tokens, Qwen 3.5 397B is 2.1x cheaper at $0.6/1M tokens. For output tokens, Qwen 3.5 397B is 2.8x cheaper at $3.6/1M tokens. At typical usage (1M input + 300K output), Gemini 2.5 Pro costs $4.25 vs Qwen 3.5 397B at $1.68.
What's the context window difference?
Gemini 2.5 Pro supports 1.0M context (1,048,576 tokens), while Qwen 3.5 397B supports 128K (128,000 tokens). Gemini 2.5 Pro can handle 8x more context in a single request.
Which model has better benchmarks?
When should I choose Gemini 2.5 Pro over Qwen 3.5 397B?
Choose Gemini 2.5 Pro when you need: Larger context window (1.0M vs 128K), Higher max output tokens. Choose Qwen 3.5 397B when you need: Cheaper input tokens, Cheaper output tokens.
How much would 10,000 API requests cost?
At 1K input + 300 output tokens per request (typical chat): Gemini 2.5 Pro = $42.50, Qwen 3.5 397B = $16.80. At 10K input + 1K output per request (longer conversations): Gemini 2.5 Pro = $225.00, Qwen 3.5 397B = $96.00.
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