Step 3.7 Flash is $0.16 cheaper per 1M input tokens (44.4% lower; 1.8x difference).
API cost decision in 10 seconds
NewStep 3.7 Flash vs Qwen2.5 72B Instruct
Pick Qwen2.5 72B Instruct for lower cost; pick Step 3.7 Flash only if the larger context window matters more.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Qwen2.5 72B Instruct for lower cost; pick Step 3.7 Flash only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Qwen2.5 72B Instruct is estimated at $0.56 vs $0.77 for Step 3.7 Flash, saving $0.21 (27.7% lower).
Cost-first pickQwen2.5 72B Instruct
Context-first pickStep 3.7 Flash
Sample savings$0.2127.7%
10x traffic gap$2.15
Step 3.7 Flash has more context, but Qwen2.5 72B Instruct saves $0.21 on the standard workload. At 10x that traffic, the same price gap is about $2.15. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Cost winner changes by workload shape: input-heavy / RAG favors Step 3.7 Flash, balanced workload favors Qwen2.5 72B Instruct, and output-heavy chatbot favors Qwen2.5 72B Instruct.
| Workload shape | Token mix | Better pick | Step 3.7 Flash | Qwen2.5 72B Instruct |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Step 3.7 Flash | $1.57 | $2 |
| Balanced workload | 1M input + 1M output | Qwen2.5 72B Instruct | $1.35 | $0.76 |
| Output-heavy chatbot | 1M input + 5M output | Qwen2.5 72B Instruct | $5.95 | $2.36 |
Qwen2.5 72B Instruct is $0.75 cheaper per 1M output tokens (65.2% lower; 2.87x difference).
Step 3.7 Flash has 124.93K more context (1.95x larger).
Qwen2.5 72B Instruct is $0.21 cheaper on the standard workload (27.7% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Step 3.7 Flash has the lower input price; Qwen2.5 72B Instruct has the lower output price; Step 3.7 Flash offers the larger context window. For the 1M input plus 500K output sample, Qwen2.5 72B Instruct is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.77 for Step 3.7 Flash and $0.56 for Qwen2.5 72B Instruct.
Choose Step 3.7 Flash when you care most about lower input-token price, and larger context window.
Choose Qwen2.5 72B Instruct when you care most about lower output-token price.
- On the standard 1M input plus 500K output workload, Qwen2.5 72B Instruct is estimated at $0.56 vs $0.77 for Step 3.7 Flash, saving $0.21 (27.7% lower).
- Qwen2.5 72B Instruct is $0.21 cheaper on the standard workload (27.7% lower).
- Step 3.7 Flash is $0.16 cheaper per 1M input tokens (44.4% lower; 1.8x difference).
- Qwen2.5 72B Instruct is $0.75 cheaper per 1M output tokens (65.2% lower; 2.87x difference).
- Step 3.7 Flash has 124.93K more context (1.95x larger).
| Feature | NewStep 3.7 Flash (StepFun) | Qwen2.5 72B Instruct (Qwen) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.2 | $0.36 |
| Completion Price per 1M tokens | $1.15 | $0.4 |
| Sample Workload Cost 1M input + 500K output | $0.77 | $0.56 |
| Context Window | 256K | 131.07K |
| Release Date | ||
| Popularity | #101 | #139 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Qwen2.5 72B Instruct | On the standard 1M input plus 500K output workload, Qwen2.5 72B Instruct is estimated at $0.56 vs $0.77 for Step 3.7 Flash, saving $0.21 (27.7% lower). |
| High-volume input processing | Step 3.7 Flash | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Qwen2.5 72B Instruct | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Step 3.7 Flash | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Step 3.5 Flash can replace Step 3.7 Flash when lower sample workload cost matters most: $0.24.
- Qwen3 Next 80B A3B Instruct (free) can replace Qwen2.5 72B Instruct when lower sample workload cost matters most: $0.
- Qwen3 Coder 480B A35B (free) can replace Qwen2.5 72B Instruct when lower sample workload cost matters most: $0.
- Qwen2.5 7B Instruct can replace Qwen2.5 72B Instruct when lower sample workload cost matters most: $0.09.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Owl Alpha offers 1.05M context with $0 sample workload cost.
- DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
- MiMo-V2.5 offers 1.05M context with $0.28 sample workload cost.
- Hy3 preview · Tencent · #1
- DeepSeek V4 Flash · DeepSeek · #2
- MiMo-V2.5 · Xiaomi · #3
- Claude Sonnet 4.6 · Anthropic · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
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