API cost decision in 10 seconds

GPT-5.6 Terra Pro (batch) vs Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)

Pick Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) for lower cost; pick GPT-5.6 Terra Pro (batch) only if the larger context window matters more.

Page updated: 2026-08-06T14:08:16Z Data confirmed: 2026-08-23T11:07:50Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) for lower cost; pick GPT-5.6 Terra Pro (batch) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is estimated at $1 vs $4 for GPT-5.6 Terra Pro (batch), saving $3 (75% lower).

Cost-first pickNano Banana 2 Lite (Gemini 3.1 Flash Lite Image)

Context-first pickGPT-5.6 Terra Pro (batch)

Sample savings$375%

10x traffic gap$30

GPT-5.6 Terra Pro (batch) has more context, but Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) saves $3 on the standard workload. At 10x that traffic, the same price gap is about $30. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	GPT-5.6 Terra Pro (batch)	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)
Input-heavy / RAG	5M input + 500K output	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	$8	$2
Balanced workload	1M input + 1M output	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	$7	$1.75
Output-heavy chatbot	1M input + 5M output	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	$31	$7.75

Cheaper input Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) $1 vs $0.25 / 1M

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $0.75 cheaper per 1M input tokens (75% lower; 4x difference).

Cheaper output Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) $6 vs $1.5 / 1M

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $4.5 cheaper per 1M output tokens (75% lower; 4x difference).

Larger context GPT-5.6 Terra Pro (batch) 1.05M vs 65.54K

GPT-5.6 Terra Pro (batch) has 984.46K more context (16x larger).

Sample workload Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) $4 vs $1

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $3 cheaper on the standard workload (75% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

GPT-5.6 Terra Pro (batch) Calculating… Estimated API cost

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) 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

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) has the lower input price; Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) has the lower output price; GPT-5.6 Terra Pro (batch) offers the larger context window. For the 1M input plus 500K output sample, Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $4 for GPT-5.6 Terra Pro (batch) and $1 for Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image).

Best Fit

Choose GPT-5.6 Terra Pro (batch) when you care most about larger context window.

Choose Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) when you care most about lower input-token price, and lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is estimated at $1 vs $4 for GPT-5.6 Terra Pro (batch), saving $3 (75% lower).
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $3 cheaper on the standard workload (75% lower).
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $0.75 cheaper per 1M input tokens (75% lower; 4x difference).
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $4.5 cheaper per 1M output tokens (75% lower; 4x difference).
GPT-5.6 Terra Pro (batch) has 984.46K more context (16x larger).

Head-to-Head Specs

Feature	GPT-5.6 Terra Pro (batch) (OpenAI)	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) (Google)
Input Price prompt tokens per 1M	$1	$0.25
Completion Price per 1M tokens	$6	$1.5
Sample Workload Cost 1M input + 500K output	$4	$1
Context Window	1.05M	65.54K
Release Date	2026-07-09	2026-06-30

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	On the standard 1M input plus 500K output workload, Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is estimated at $1 vs $4 for GPT-5.6 Terra Pro (batch), saving $3 (75% lower).
High-volume input processing	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	GPT-5.6 Terra Pro (batch)	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

gpt-oss-120b (free) can replace GPT-5.6 Terra Pro (batch) when lower sample workload cost matters most: $0.
gpt-oss-20b (free) can replace GPT-5.6 Terra Pro (batch) when lower sample workload cost matters most: $0.
gpt-oss-20b can replace GPT-5.6 Terra Pro (batch) when lower sample workload cost matters most: $0.1.
gpt-oss-120b can replace GPT-5.6 Terra Pro (batch) when lower sample workload cost matters most: $0.12.

Larger context near this budget

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.

Popular competitors

DeepSeek V4 Flash 0731 · DeepSeek · #1
MiMo-V2.5 · Xiaomi · #2
Hy3 · Tencent · #3
Ox Alpha · stealth · #4

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Larger context alternatives

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OpenAI catalog

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Google catalog

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Open Google models

GPT-5.6 Terra Pro (batch)

GPT-5.6 Terra Pro is the same underlying model as [GPT-5.6 Terra](https://openrouter.ai/openai/gpt-5.6-terra), served with `reasoning.mode` set to `pro` for higher-quality responses on complex tasks. Learn more in OpenAI's docs: https://developers.openai.com/api/docs/guides/reasoning#reasoning-mode

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is Google's fastest, most cost-efficient Gemini image model, built for high-velocity developer pipelines and rapid-fire visual exploration. It delivers text-to-image generation...