API cost decision in 10 seconds

Free Models Router vs Nano Banana Pro (Gemini 3 Pro Image Preview)

Pick Free Models Router 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 Free Models Router when budget and context both matter.

On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $8 for Nano Banana Pro (Gemini 3 Pro Image Preview), saving $8 (100% lower).

Cost-first pickFree Models Router
Context-first pickFree Models Router
Sample savings$8100%
10x traffic gap$80

Free Models Router is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $80. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Free Models Router stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shapeToken mixBetter pickFree Models RouterNano Banana Pro (Gemini 3 Pro Image Preview)
Input-heavy / RAG5M input + 500K outputFree Models Router$0$16
Balanced workload1M input + 1M outputFree Models Router$0$14
Output-heavy chatbot1M input + 5M outputFree Models Router$0$62
Cheaper input Free Models Router $0 vs $2 / 1M

Free Models Router is free for input tokens while Nano Banana Pro (Gemini 3 Pro Image Preview) costs $2 per 1M tokens.

Cheaper output Free Models Router $0 vs $12 / 1M

Free Models Router is free for output tokens while Nano Banana Pro (Gemini 3 Pro Image Preview) costs $12 per 1M tokens.

Larger context Free Models Router 200K vs 65.54K

Free Models Router has 134.46K more context (3.05x larger).

Sample workload Free Models Router $0 vs $8

Free Models Router is free for the standard workload while the other model is estimated at $8.

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.
Free Models Router Calculating… Estimated API cost
Nano Banana Pro (Gemini 3 Pro Image Preview) Calculating… Estimated API cost
Cheaper for this workload Calculating… Difference: calculating…

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

Verdict

Free Models Router has the lower input price; Free Models Router has the lower output price; Free Models Router offers the larger context window. For the 1M input plus 500K output sample, Free Models Router is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0 for Free Models Router and $8 for Nano Banana Pro (Gemini 3 Pro Image Preview).

Best Fit

Choose Free Models Router 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 Preview) when its provider, model quality, latency, or availability is more important than the numeric price/context winner.

Decision Notes
  • On the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $8 for Nano Banana Pro (Gemini 3 Pro Image Preview), saving $8 (100% lower).
  • Free Models Router is free for the standard workload while the other model is estimated at $8.
  • Free Models Router is free for input tokens while Nano Banana Pro (Gemini 3 Pro Image Preview) costs $2 per 1M tokens.
  • Free Models Router is free for output tokens while Nano Banana Pro (Gemini 3 Pro Image Preview) costs $12 per 1M tokens.
  • Free Models Router has 134.46K more context (3.05x larger).
Head-to-Head Specs
FeatureFree Models Router
(OpenRouter)		Nano Banana Pro (Gemini 3 Pro Image Preview)
(Google)
Input Price
prompt tokens per 1M		$0$2
Completion Price
per 1M tokens		$0$12
Sample Workload Cost
1M input + 500K output		$0$8
Context Window200K65.54K
Release Date

Use-Case Decision Matrix

Use caseBetter pickWhy
Budget-constrained productionFree Models RouterOn the standard 1M input plus 500K output workload, Free Models Router is estimated at $0 vs $8 for Nano Banana Pro (Gemini 3 Pro Image Preview), saving $8 (100% lower).
High-volume input processingFree Models RouterLower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbotsFree Models RouterLower output-token price matters most when assistants generate many completion tokens.
RAG or long-document workFree Models RouterA larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps
  • Gemma 4 26B A4B (free) can replace Nano Banana Pro (Gemini 3 Pro Image Preview) when lower sample workload cost matters most: $0.
  • Gemma 4 31B (free) can replace Nano Banana Pro (Gemini 3 Pro Image Preview) when lower sample workload cost matters most: $0.
  • Lyria 3 Pro Preview can replace Nano Banana Pro (Gemini 3 Pro Image Preview) when lower sample workload cost matters most: $0.
  • Lyria 3 Clip Preview can replace Nano Banana Pro (Gemini 3 Pro Image Preview) when lower sample workload cost matters most: $0.
Larger context near this budget
  • 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.
  • Grok 4.20 offers 2M context with $2.5 sample workload cost.
  • GPT-5.4 offers 1.05M context with $10 sample workload cost.

Cheaper alternatives

Review low-cost models sorted by a standard 1M input plus 500K output workload.

Open cheapest models

Larger context alternatives

Find models with larger context windows for RAG, long documents, and codebase review.

Open largest context models

Provider catalogs

Compare models within provider hubs before choosing a final API vendor.

Open provider hubs

OpenRouter catalog

Review all tracked OpenRouter models before deciding whether this matchup is the right shortlist.

Open OpenRouter models

Google catalog

Check other Google models with comparable pricing, context, or release timing.

Open Google models
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