Model Comparison
Qwen2.5 Instruct 72B
vs. Qwen3.5 Omni Flash
Comparing 2 AI models · 12 benchmarks · Alibaba
Recommended Pick
AlQwen3.5 Omni Flash12 metric winsStrongest on: Value, Input price, Blended price
Best Value
Qwen3.5 Omni Flash
100.0 value score
33.4 reasoning / $0.28/1M
Lowest Price
Qwen3.5 Omni Flash
$0.10/1M input price
Best Reasoning
Qwen3.5 Omni Flash
33.4 reasoning score
Blends available reasoning benchmarks
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Best value
Qwen3.5 Omni Flash has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Qwen3.5 Omni Flash is 4.7x cheaper on input tokens than Qwen2.5 Instruct 72B.
Reasoning gap
Qwen3.5 Omni Flash leads Qwen2.5 Instruct 72B by 5.9 points on reasoning.
Top-pick rationale
Qwen3.5 Omni Flash wins 12 measurable categories, including Value, Input price, Blended price, Throughput.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Qwen2.5 Instruct 72B
Alibaba
TTFT
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Time
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tok/s
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Tokens
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Cost
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Qwen3.5 Omni Flash
Alibaba
TTFT
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Time
—
tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Al Qwen2.5 Instruct 72B | Top Pick Al Qwen3.5 Omni Flash |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.47/1M | $0.10/1M |
| Output Cost | $0.49/1M | $0.80/1M |
| Blended (3:1) | $0.48/1M | $0.28/1M |
| Specifications | ||
| Organization | Alibaba | Alibaba |
| Release Date | Sep 19, 2024 | Mar 30, 2026 |
| Performance & Speed | ||
| Throughput | — | 250.5 tok/s |
| TTFT | — | 1104ms |
| Latency | — | 1104ms |
| Composite Indices | ||
| Value Score | 47.2 | 100.0 |
| Reasoning Score | 27.5 | 33.4 |
| Intelligence | 9.6 | 19.0 |
| Math | 14.0 | — |
| Standard Benchmarks | ||
| GPQA | 49.1% | 74.2% |
| MMLU Pro | 72.0% | — |
| HLE | 4.2% | 7.1% |
| LiveCodeBench | 27.6% | — |
| MATH 500 | 85.8% | — |
| AIME 2025 | 14.0% | — |
| AIME (Original) | 16.0% | — |
| SciCode | 26.7% | 25.5% |
| LCR | 20.3% | 44.0% |
| IFBench | 36.9% | 38.0% |
| TAU-bench v2 | 34.5% | 84.5% |
| TerminalBench Hard | 4.5% | 8.3% |
Key Takeaways
Qwen3.5 Omni Flash offers the best value at $0.10/1M,making it ideal for high-volume applications and cost-conscious projects.
Qwen3.5 Omni Flash has the strongest reasoning profile with a 33.4 reasoning score,combining the available reasoning-heavy benchmarks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Qwen2.5 Instruct 72B
- General-purpose AI
- Versatile applications
Qwen3.5 Omni Flash
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
