API cost decision in 10 seconds

Nano Banana 2 (Gemini 3.1 Flash Image Preview) vs Cogito v2.1 671B

Pick Cogito v2.1 671B for lower cost; pick Nano Banana 2 (Gemini 3.1 Flash Image Preview) only if the larger context window matters more.

Pricing data updated: 2026-05-26T11:08:00Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick Cogito v2.1 671B for lower cost; pick Nano Banana 2 (Gemini 3.1 Flash Image Preview) only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.12 (6.2% lower).

Cost-first pickCogito v2.1 671B

Context-first pickNano Banana 2 (Gemini 3.1 Flash Image Preview)

Sample savings$0.126.2%

10x traffic gap$1.25

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has more context, but Cogito v2.1 671B saves $0.12 on the standard workload. At 10x that traffic, the same price gap is about $1.25. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

Cost winner changes by workload shape: input-heavy / RAG favors Nano Banana 2 (Gemini 3.1 Flash Image Preview), balanced workload favors Cogito v2.1 671B, and output-heavy chatbot favors Cogito v2.1 671B.

Workload shape	Token mix	Better pick	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	Cogito v2.1 671B
Input-heavy / RAG	5M input + 500K output	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	$4	$6.88
Balanced workload	1M input + 1M output	Cogito v2.1 671B	$3.5	$2.5
Output-heavy chatbot	1M input + 5M output	Cogito v2.1 671B	$15.5	$7.5

Cheaper input Nano Banana 2 (Gemini 3.1 Flash Image Preview) $0.5 vs $1.25 / 1M

Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.75 cheaper per 1M input tokens (60% lower; 2.5x difference).

Cheaper output Cogito v2.1 671B $3 vs $1.25 / 1M

Cogito v2.1 671B is $1.75 cheaper per 1M output tokens (58.3% lower; 2.4x difference).

Larger context Nano Banana 2 (Gemini 3.1 Flash Image Preview) 131.07K vs 128K

Nano Banana 2 (Gemini 3.1 Flash Image Preview) has 3.07K more context (1.02x larger).

Sample workload Cogito v2.1 671B $2 vs $1.88

Cogito v2.1 671B is $0.12 cheaper on the standard workload (6.2% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Nano Banana 2 (Gemini 3.1 Flash Image Preview) Calculating… Estimated API cost

Cogito v2.1 671B 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 (Gemini 3.1 Flash Image Preview) has the lower input price; Cogito v2.1 671B has the lower output price; Nano Banana 2 (Gemini 3.1 Flash Image Preview) offers the larger context window. For the 1M input plus 500K output sample, Cogito v2.1 671B is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview) and $1.88 for Cogito v2.1 671B.

Best Fit

Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) when you care most about lower input-token price, and larger context window.

Choose Cogito v2.1 671B when you care most about lower output-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.12 (6.2% lower).
Cogito v2.1 671B is $0.12 cheaper on the standard workload (6.2% lower).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) is $0.75 cheaper per 1M input tokens (60% lower; 2.5x difference).
Cogito v2.1 671B is $1.75 cheaper per 1M output tokens (58.3% lower; 2.4x difference).
Nano Banana 2 (Gemini 3.1 Flash Image Preview) has 3.07K more context (1.02x larger).

Head-to-Head Specs

Feature	Nano Banana 2 (Gemini 3.1 Flash Image Preview) (Google)	Cogito v2.1 671B (Deep Cogito)
Input Price prompt tokens per 1M	$0.5	$1.25
Completion Price per 1M tokens	$3	$1.25
Sample Workload Cost 1M input + 500K output	$2	$1.88
Context Window	131.07K	128K
Release Date	2026-02-26	2025-11-13

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Cogito v2.1 671B	On the standard 1M input plus 500K output workload, Cogito v2.1 671B is estimated at $1.88 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $0.12 (6.2% lower).
High-volume input processing	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Cogito v2.1 671B	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Nano Banana 2 (Gemini 3.1 Flash Image Preview)	A 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 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
Gemma 4 31B (free) can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
Lyria 3 Pro Preview can replace Nano Banana 2 (Gemini 3.1 Flash Image Preview) when lower sample workload cost matters most: $0.
Lyria 3 Clip Preview can replace Nano Banana 2 (Gemini 3.1 Flash 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 offers 2M context with $2.5 sample workload cost.
Owl Alpha offers 1.05M context with $0 sample workload cost.
Gemini 3.1 Flash Lite offers 1.05M context with $1 sample workload cost.

Popular competitors

No popular competitor is currently available.

Cheaper alternatives

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Larger context alternatives

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

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Provider catalogs

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Google catalog

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Deep Cogito catalog

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