Nano Banana Pro (Gemini 3 Pro Image Preview) is $3 cheaper per 1M input tokens (60% lower; 2.5x difference).
API cost decision in 10 seconds
OpenAI GPT Latest vs Nano Banana Pro (Gemini 3 Pro Image Preview)
Pick Nano Banana Pro (Gemini 3 Pro Image Preview) for lower cost; pick OpenAI GPT Latest 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 Nano Banana Pro (Gemini 3 Pro Image Preview) for lower cost; pick OpenAI GPT Latest only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Nano Banana Pro (Gemini 3 Pro Image Preview) is estimated at $8 vs $20 for OpenAI GPT Latest, saving $12 (60% lower).
Cost-first pickNano Banana Pro (Gemini 3 Pro Image Preview)
Context-first pickOpenAI GPT Latest
Sample savings$1260%
10x traffic gap$120
OpenAI GPT Latest has more context, but Nano Banana Pro (Gemini 3 Pro Image Preview) saves $12 on the standard workload. At 10x that traffic, the same price gap is about $120. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Nano Banana Pro (Gemini 3 Pro Image Preview) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | OpenAI GPT Latest | Nano Banana Pro (Gemini 3 Pro Image Preview) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Nano Banana Pro (Gemini 3 Pro Image Preview) | $40 | $16 |
| Balanced workload | 1M input + 1M output | Nano Banana Pro (Gemini 3 Pro Image Preview) | $35 | $14 |
| Output-heavy chatbot | 1M input + 5M output | Nano Banana Pro (Gemini 3 Pro Image Preview) | $155 | $62 |
Nano Banana Pro (Gemini 3 Pro Image Preview) is $18 cheaper per 1M output tokens (60% lower; 2.5x difference).
OpenAI GPT Latest has 984.46K more context (16x larger).
Nano Banana Pro (Gemini 3 Pro Image Preview) is $12 cheaper on the standard workload (60% 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 Pro (Gemini 3 Pro Image Preview) has the lower input price; Nano Banana Pro (Gemini 3 Pro Image Preview) has the lower output price; OpenAI GPT Latest offers the larger context window. For the 1M input plus 500K output sample, Nano Banana Pro (Gemini 3 Pro Image Preview) is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $20 for OpenAI GPT Latest and $8 for Nano Banana Pro (Gemini 3 Pro Image Preview).
Choose OpenAI GPT Latest when you care most about larger context window.
Choose Nano Banana Pro (Gemini 3 Pro Image Preview) when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Nano Banana Pro (Gemini 3 Pro Image Preview) is estimated at $8 vs $20 for OpenAI GPT Latest, saving $12 (60% lower).
- Nano Banana Pro (Gemini 3 Pro Image Preview) is $12 cheaper on the standard workload (60% lower).
- Nano Banana Pro (Gemini 3 Pro Image Preview) is $3 cheaper per 1M input tokens (60% lower; 2.5x difference).
- Nano Banana Pro (Gemini 3 Pro Image Preview) is $18 cheaper per 1M output tokens (60% lower; 2.5x difference).
- OpenAI GPT Latest has 984.46K more context (16x larger).
| Feature | OpenAI GPT Latest (OpenAI) | Nano Banana Pro (Gemini 3 Pro Image Preview) (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $5 | $2 |
| Completion Price per 1M tokens | $30 | $12 |
| Sample Workload Cost 1M input + 500K output | $20 | $8 |
| Context Window | 1.05M | 65.54K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Nano Banana Pro (Gemini 3 Pro Image Preview) | On the standard 1M input plus 500K output workload, Nano Banana Pro (Gemini 3 Pro Image Preview) is estimated at $8 vs $20 for OpenAI GPT Latest, saving $12 (60% lower). |
| High-volume input processing | Nano Banana Pro (Gemini 3 Pro Image Preview) | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Nano Banana Pro (Gemini 3 Pro Image Preview) | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | OpenAI GPT Latest | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- gpt-oss-120b (free) can replace OpenAI GPT Latest when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace OpenAI GPT Latest when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace OpenAI GPT Latest when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace OpenAI GPT Latest when lower sample workload cost matters most: $0.13.
- Llama 4 Scout offers 10M context with $0.23 sample workload cost.
- Grok 4.20 Multi-Agent offers 2M context with $5 sample workload cost.
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Nano Banana Pro is Google’s most advanced image-generation and editing model, built on Gemini 3 Pro. It extends the original Nano Banana with significantly improved multimodal reasoning, real-world grounding, and...