API cost decision in 10 seconds

NewSeed 2.1 Turbo 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 Seed 2.1 Turbo only if the larger context window matters more.

Page updated: 2026-08-12T17:08:18Z 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 Seed 2.1 Turbo 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 $1.75 for Seed 2.1 Turbo, saving $0.75 (42.9% lower).

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

Context-first pickSeed 2.1 Turbo

Sample savings$0.7542.9%

10x traffic gap$7.5

Seed 2.1 Turbo has more context, but Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) saves $0.75 on the standard workload. At 10x that traffic, the same price gap is about $7.5. 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	Seed 2.1 Turbo	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)	$3.75	$2
Balanced workload	1M input + 1M output	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	$3	$1.75
Output-heavy chatbot	1M input + 5M output	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image)	$13	$7.75

Cheaper input Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) $0.5 vs $0.25 / 1M

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $0.25 cheaper per 1M input tokens (50% lower; 2x difference).

Cheaper output Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) $2.5 vs $1.5 / 1M

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $1 cheaper per 1M output tokens (40% lower; 1.67x difference).

Larger context Seed 2.1 Turbo 262.14K vs 65.54K

Seed 2.1 Turbo has 196.61K more context (4x larger).

Sample workload Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) $1.75 vs $1

Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $0.75 cheaper on the standard workload (42.9% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Seed 2.1 Turbo 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; Seed 2.1 Turbo 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 $1.75 for Seed 2.1 Turbo and $1 for Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image).

Best Fit

Choose Seed 2.1 Turbo 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 $1.75 for Seed 2.1 Turbo, saving $0.75 (42.9% lower).
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $0.75 cheaper on the standard workload (42.9% lower).
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $0.25 cheaper per 1M input tokens (50% lower; 2x difference).
Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) is $1 cheaper per 1M output tokens (40% lower; 1.67x difference).
Seed 2.1 Turbo has 196.61K more context (4x larger).

Head-to-Head Specs

Feature	NewSeed 2.1 Turbo (ByteDance Seed)	Nano Banana 2 Lite (Gemini 3.1 Flash Lite Image) (Google)
Input Price prompt tokens per 1M	$0.5	$0.25
Completion Price per 1M tokens	$2.5	$1.5
Sample Workload Cost 1M input + 500K output	$1.75	$1
Context Window	262.14K	65.54K
Release Date	2026-08-12	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 $1.75 for Seed 2.1 Turbo, saving $0.75 (42.9% 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	Seed 2.1 Turbo	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Seed 1.6 Flash can replace Seed 2.1 Turbo when lower sample workload cost matters most: $0.22.
Seed-2.0-Mini can replace Seed 2.1 Turbo when lower sample workload cost matters most: $0.3.
Seed-2.0-Lite can replace Seed 2.1 Turbo when lower sample workload cost matters most: $1.25.
Seed 1.6 can replace Seed 2.1 Turbo when lower sample workload cost matters most: $1.25.

Larger context near this budget

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.
Llama 4 Scout offers 1.31M context with $0.25 sample workload cost.
MiMo-V2.5 offers 1.05M context with $0.28 sample workload cost.

Popular competitors

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

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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ByteDance Seed catalog

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Google catalog

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