Nano Banana 2 (Gemini 3.1 Flash Image) is $0.24 cheaper per 1M input tokens (32.4% lower; 1.48x difference).
API cost decision in 10 seconds
KAT-Coder-Pro V2.5 vs Nano Banana 2 (Gemini 3.1 Flash Image)
Pick Nano Banana 2 (Gemini 3.1 Flash Image) for lower cost; pick KAT-Coder-Pro V2.5 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 Nano Banana 2 (Gemini 3.1 Flash Image) for lower cost; pick KAT-Coder-Pro V2.5 only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Nano Banana 2 (Gemini 3.1 Flash Image) is estimated at $2 vs $2.22 for KAT-Coder-Pro V2.5, saving $0.22 (9.9% lower).
Cost-first pickNano Banana 2 (Gemini 3.1 Flash Image)
Context-first pickKAT-Coder-Pro V2.5
Sample savings$0.229.9%
10x traffic gap$2.2
KAT-Coder-Pro V2.5 has more context, but Nano Banana 2 (Gemini 3.1 Flash Image) saves $0.22 on the standard workload. At 10x that traffic, the same price gap is about $2.2. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Nano Banana 2 (Gemini 3.1 Flash Image) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | KAT-Coder-Pro V2.5 | Nano Banana 2 (Gemini 3.1 Flash Image) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Nano Banana 2 (Gemini 3.1 Flash Image) | $5.18 | $4 |
| Balanced workload | 1M input + 1M output | Nano Banana 2 (Gemini 3.1 Flash Image) | $3.7 | $3.5 |
| Output-heavy chatbot | 1M input + 5M output | Nano Banana 2 (Gemini 3.1 Flash Image) | $15.54 | $15.5 |
KAT-Coder-Pro V2.5 is $0.04 cheaper per 1M output tokens (1.3% lower; 1.01x difference).
KAT-Coder-Pro V2.5 has 124.93K more context (1.95x larger).
Nano Banana 2 (Gemini 3.1 Flash Image) is $0.22 cheaper on the standard workload (9.9% 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
Nano Banana 2 (Gemini 3.1 Flash Image) has the lower input price; KAT-Coder-Pro V2.5 has the lower output price; KAT-Coder-Pro V2.5 offers the larger context window. For the 1M input plus 500K output sample, Nano Banana 2 (Gemini 3.1 Flash Image) is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $2.22 for KAT-Coder-Pro V2.5 and $2 for Nano Banana 2 (Gemini 3.1 Flash Image).
Choose KAT-Coder-Pro V2.5 when you care most about lower output-token price, and larger context window.
Choose Nano Banana 2 (Gemini 3.1 Flash Image) when you care most about lower input-token price.
- On the standard 1M input plus 500K output workload, Nano Banana 2 (Gemini 3.1 Flash Image) is estimated at $2 vs $2.22 for KAT-Coder-Pro V2.5, saving $0.22 (9.9% lower).
- Nano Banana 2 (Gemini 3.1 Flash Image) is $0.22 cheaper on the standard workload (9.9% lower).
- Nano Banana 2 (Gemini 3.1 Flash Image) is $0.24 cheaper per 1M input tokens (32.4% lower; 1.48x difference).
- KAT-Coder-Pro V2.5 is $0.04 cheaper per 1M output tokens (1.3% lower; 1.01x difference).
- KAT-Coder-Pro V2.5 has 124.93K more context (1.95x larger).
| Feature | KAT-Coder-Pro V2.5 (Kwaipilot) | Nano Banana 2 (Gemini 3.1 Flash Image) (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.74 | $0.5 |
| Completion Price per 1M tokens | $2.96 | $3 |
| Sample Workload Cost 1M input + 500K output | $2.22 | $2 |
| Context Window | 256K | 131.07K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Nano Banana 2 (Gemini 3.1 Flash Image) | On the standard 1M input plus 500K output workload, Nano Banana 2 (Gemini 3.1 Flash Image) is estimated at $2 vs $2.22 for KAT-Coder-Pro V2.5, saving $0.22 (9.9% lower). |
| High-volume input processing | Nano Banana 2 (Gemini 3.1 Flash Image) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | KAT-Coder-Pro V2.5 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | KAT-Coder-Pro V2.5 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- KAT-Coder-Air V2.5 can replace KAT-Coder-Pro V2.5 when lower sample workload cost matters most: $0.45.
- KAT-Coder-Pro V2 can replace KAT-Coder-Pro V2.5 when lower sample workload cost matters most: $0.9.
- Gemma 4 26B A4B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image) when lower sample workload cost matters most: $0.
- Gemma 4 31B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image) when lower sample workload cost matters most: $0.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.17 sample workload cost.
- DeepSeek V4 Flash Latest offers 1.31M context with $0.11 sample workload cost.
- DeepSeek V4 Flash 0731 · DeepSeek · #1
- MiMo-V2.5 · Xiaomi · #2
- Hy3 · Tencent · #3
- Ox Alpha · stealth · #4
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