Mercury 2 is $0.14 cheaper per 1M input tokens (35.9% lower; 1.56x difference).
API cost decision in 10 seconds
Mercury 2 vs Qwen3.5 397B A17B
Pick Mercury 2 for lower cost; pick Qwen3.5 397B A17B only if the larger context window matters more.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Mercury 2 for lower cost; pick Qwen3.5 397B A17B only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Mercury 2 is estimated at $0.62 vs $1.56 for Qwen3.5 397B A17B, saving $0.94 (59.9% lower).
Cost-first pickMercury 2
Context-first pickQwen3.5 397B A17B
Sample savings$0.9459.9%
10x traffic gap$9.35
Qwen3.5 397B A17B has more context, but Mercury 2 saves $0.94 on the standard workload. At 10x that traffic, the same price gap is about $9.35. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Mercury 2 stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Mercury 2 | Qwen3.5 397B A17B |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Mercury 2 | $1.62 | $3.12 |
| Balanced workload | 1M input + 1M output | Mercury 2 | $1 | $2.73 |
| Output-heavy chatbot | 1M input + 5M output | Mercury 2 | $4 | $12.09 |
Mercury 2 is $1.59 cheaper per 1M output tokens (67.9% lower; 3.12x difference).
Qwen3.5 397B A17B has 134.14K more context (2.05x larger).
Mercury 2 is $0.94 cheaper on the standard workload (59.9% 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
Mercury 2 has the lower input price; Mercury 2 has the lower output price; Qwen3.5 397B A17B offers the larger context window. For the 1M input plus 500K output sample, Mercury 2 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.62 for Mercury 2 and $1.56 for Qwen3.5 397B A17B.
Choose Mercury 2 when you care most about lower input-token price, and lower output-token price.
Choose Qwen3.5 397B A17B when you care most about larger context window.
- On the standard 1M input plus 500K output workload, Mercury 2 is estimated at $0.62 vs $1.56 for Qwen3.5 397B A17B, saving $0.94 (59.9% lower).
- Mercury 2 is $0.94 cheaper on the standard workload (59.9% lower).
- Mercury 2 is $0.14 cheaper per 1M input tokens (35.9% lower; 1.56x difference).
- Mercury 2 is $1.59 cheaper per 1M output tokens (67.9% lower; 3.12x difference).
- Qwen3.5 397B A17B has 134.14K more context (2.05x larger).
| Feature | Mercury 2 (Inception) | Qwen3.5 397B A17B (Qwen) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.25 | $0.39 |
| Completion Price per 1M tokens | $0.75 | $2.34 |
| Sample Workload Cost 1M input + 500K output | $0.62 | $1.56 |
| Context Window | 128K | 262.14K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Mercury 2 | On the standard 1M input plus 500K output workload, Mercury 2 is estimated at $0.62 vs $1.56 for Qwen3.5 397B A17B, saving $0.94 (59.9% lower). |
| High-volume input processing | Mercury 2 | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Mercury 2 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Qwen3.5 397B A17B | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Qwen3 Next 80B A3B Instruct (free) can replace Qwen3.5 397B A17B when lower sample workload cost matters most: $0.
- Qwen3 Coder 480B A35B (free) can replace Qwen3.5 397B A17B when lower sample workload cost matters most: $0.
- Qwen2.5 7B Instruct can replace Qwen3.5 397B A17B when lower sample workload cost matters most: $0.09.
- Qwen3.5-9B can replace Qwen3.5 397B A17B when lower sample workload cost matters most: $0.11.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
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- DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
- DeepSeek V4 Pro offers 1.05M context with $0.87 sample workload cost.
- DeepSeek V4 Flash · DeepSeek · #1
- Hy3 preview · Tencent · #2
- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
Cheaper alternatives
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