Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.1 cheaper per 1M input tokens (16.7% lower; 1.2x difference).
API cost decision in 10 seconds
Kimi K2 0905 vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Pick Kimi K2 0905 when budget and context both matter.
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Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Kimi K2 0905 when budget and context both matter.
On the standard 1M input plus 500K output workload, Kimi K2 0905 is estimated at $1.85 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.15 (7.5% lower).
Cost-first pickKimi K2 0905
Context-first pickKimi K2 0905
Sample savings$0.157.5%
10x traffic gap$1.5
Kimi K2 0905 is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $1.5. 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 Nano Banana 2 (Gemini 3.1 Flash Image Preview), balanced workload favors Kimi K2 0905, and output-heavy chatbot favors Kimi K2 0905.
| Workload shape | Token mix | Better pick | Kimi K2 0905 | Nano Banana 2 (Gemini 3.1 Flash Image Preview) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | $4.25 | $4 |
| Balanced workload | 1M input + 1M output | Kimi K2 0905 | $3.1 | $3.5 |
| Output-heavy chatbot | 1M input + 5M output | Kimi K2 0905 | $13.1 | $15.5 |
Kimi K2 0905 is $0.5 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
Kimi K2 0905 has 131.07K more context (2x larger).
Kimi K2 0905 is $0.15 cheaper on the standard workload (7.5% 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 Preview) has the lower input price; Kimi K2 0905 has the lower output price; Kimi K2 0905 offers the larger context window. For the 1M input plus 500K output sample, Kimi K2 0905 is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $1.85 for Kimi K2 0905 and $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview).
Choose Kimi K2 0905 when you care most about lower output-token price, and larger context window.
Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) when you care most about lower input-token price.
- On the standard 1M input plus 500K output workload, Kimi K2 0905 is estimated at $1.85 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.15 (7.5% lower).
- Kimi K2 0905 is $0.15 cheaper on the standard workload (7.5% lower).
- Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.1 cheaper per 1M input tokens (16.7% lower; 1.2x difference).
- Kimi K2 0905 is $0.5 cheaper per 1M output tokens (16.7% lower; 1.2x difference).
- Kimi K2 0905 has 131.07K more context (2x larger).
| Feature | Kimi K2 0905 (MoonshotAI) | Nano Banana 2 (Gemini 3.1 Flash Image Preview) (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.6 | $0.5 |
| Completion Price per 1M tokens | $2.5 | $3 |
| Sample Workload Cost 1M input + 500K output | $1.85 | $2 |
| Context Window | 262.14K | 131.07K |
| Release Date | ||
| Popularity | #70 | #129 |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Kimi K2 0905 | On the standard 1M input plus 500K output workload, Kimi K2 0905 is estimated at $1.85 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.15 (7.5% lower). |
| High-volume input processing | Nano Banana 2 (Gemini 3.1 Flash Image Preview) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Kimi K2 0905 | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Kimi K2 0905 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- Kimi K2.5 can replace Kimi K2 0905 when lower sample workload cost matters most: $1.35.
- Kimi K2 0711 can replace Kimi K2 0905 when lower sample workload cost matters most: $1.72.
- Gemma 4 31B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
- Gemma 4 26B A4B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 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.
- DeepSeek V4 Flash · DeepSeek · #1
- Hy3 preview · Tencent · #2
- Claude Opus 4.7 · Anthropic · #3
- Claude Sonnet 4.6 · Anthropic · #4
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Open Google modelsKimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32...
Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines...