OpenAI GPT Luna Latest is $1.8 cheaper per 1M input tokens (90% lower; 10x difference).
API cost decision in 10 seconds
NewOpenAI GPT Luna Latest vs Nano Banana Pro (Gemini 3 Pro Image)
Pick OpenAI GPT Luna Latest when budget and context both matter.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick OpenAI GPT Luna Latest when budget and context both matter.
On the standard 1M input plus 500K output workload, OpenAI GPT Luna Latest is estimated at $0.8 vs $8 for Nano Banana Pro (Gemini 3 Pro Image), saving $7.2 (90% lower).
Cost-first pickOpenAI GPT Luna Latest
Context-first pickOpenAI GPT Luna Latest
Sample savings$7.290%
10x traffic gap$72
OpenAI GPT Luna Latest is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $72. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
OpenAI GPT Luna Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | OpenAI GPT Luna Latest | Nano Banana Pro (Gemini 3 Pro Image) |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | OpenAI GPT Luna Latest | $1.6 | $16 |
| Balanced workload | 1M input + 1M output | OpenAI GPT Luna Latest | $1.4 | $14 |
| Output-heavy chatbot | 1M input + 5M output | OpenAI GPT Luna Latest | $6.2 | $62 |
OpenAI GPT Luna Latest is $10.8 cheaper per 1M output tokens (90% lower; 10x difference).
OpenAI GPT Luna Latest has 918.93K more context (8.01x larger).
OpenAI GPT Luna Latest is $7.2 cheaper on the standard workload (90% 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
OpenAI GPT Luna Latest has the lower input price; OpenAI GPT Luna Latest has the lower output price; OpenAI GPT Luna Latest offers the larger context window. For the 1M input plus 500K output sample, OpenAI GPT Luna Latest is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $0.8 for OpenAI GPT Luna Latest and $8 for Nano Banana Pro (Gemini 3 Pro Image).
Choose OpenAI GPT Luna Latest when you care most about lower input-token price, lower output-token price, and larger context window.
Choose Nano Banana Pro (Gemini 3 Pro Image) when its provider, model quality, latency, or availability is more important than the numeric price/context winner.
- On the standard 1M input plus 500K output workload, OpenAI GPT Luna Latest is estimated at $0.8 vs $8 for Nano Banana Pro (Gemini 3 Pro Image), saving $7.2 (90% lower).
- OpenAI GPT Luna Latest is $7.2 cheaper on the standard workload (90% lower).
- OpenAI GPT Luna Latest is $1.8 cheaper per 1M input tokens (90% lower; 10x difference).
- OpenAI GPT Luna Latest is $10.8 cheaper per 1M output tokens (90% lower; 10x difference).
- OpenAI GPT Luna Latest has 918.93K more context (8.01x larger).
| Feature | NewOpenAI GPT Luna Latest (OpenAI) | Nano Banana Pro (Gemini 3 Pro Image) (Google) |
|---|---|---|
| Input Price prompt tokens per 1M | $0.2 | $2 |
| Completion Price per 1M tokens | $1.2 | $12 |
| Sample Workload Cost 1M input + 500K output | $0.8 | $8 |
| Context Window | 1.05M | 131.07K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | OpenAI GPT Luna Latest | On the standard 1M input plus 500K output workload, OpenAI GPT Luna Latest is estimated at $0.8 vs $8 for Nano Banana Pro (Gemini 3 Pro Image), saving $7.2 (90% lower). |
| High-volume input processing | OpenAI GPT Luna Latest | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | OpenAI GPT Luna Latest | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | OpenAI GPT Luna 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 Luna Latest when lower sample workload cost matters most: $0.
- gpt-oss-20b (free) can replace OpenAI GPT Luna Latest when lower sample workload cost matters most: $0.
- gpt-oss-20b can replace OpenAI GPT Luna Latest when lower sample workload cost matters most: $0.1.
- gpt-oss-120b can replace OpenAI GPT Luna Latest when lower sample workload cost matters most: $0.12.
- 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.
- GLM 5.3 Flash offers 1.31M context with $0.4 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.08 sample workload cost.
- Hy4 preview · Tencent · #1
- GPT-5.6 Luna · OpenAI · #2
- GLM 5.3 Flash · Z.ai · #3
- DeepSeek V4 Flash 0731 · DeepSeek · #4
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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...