API cost decision in 10 seconds

DeepSeek V4 Flash (free) vs Nano Banana (Gemini 2.5 Flash Image)

Pick DeepSeek V4 Flash (free) when budget and context both matter.

Page updated: 2026-05-26T15:08:08Z Data confirmed: 2026-05-26T18:08:02Z Prices normalized to USD per 1M tokens Sample workload: 1M input + 500K output

Budget verdict

Pick DeepSeek V4 Flash (free) when budget and context both matter.

On the standard 1M input plus 500K output workload, DeepSeek V4 Flash (free) is estimated at $0 vs $1.55 for Nano Banana (Gemini 2.5 Flash Image), saving $1.55 (100% lower).

Cost-first pickDeepSeek V4 Flash (free)

Context-first pickDeepSeek V4 Flash (free)

Sample savings$1.55100%

10x traffic gap$15.5

DeepSeek V4 Flash (free) is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $15.5. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

DeepSeek V4 Flash (free) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	DeepSeek V4 Flash (free)	Nano Banana (Gemini 2.5 Flash Image)
Input-heavy / RAG	5M input + 500K output	DeepSeek V4 Flash (free)	$0	$2.75
Balanced workload	1M input + 1M output	DeepSeek V4 Flash (free)	$0	$2.8
Output-heavy chatbot	1M input + 5M output	DeepSeek V4 Flash (free)	$0	$12.8

Cheaper input DeepSeek V4 Flash (free) $0 vs $0.3 / 1M

DeepSeek V4 Flash (free) is free for input tokens while Nano Banana (Gemini 2.5 Flash Image) costs $0.3 per 1M tokens.

Cheaper output DeepSeek V4 Flash (free) $0 vs $2.5 / 1M

DeepSeek V4 Flash (free) is free for output tokens while Nano Banana (Gemini 2.5 Flash Image) costs $2.5 per 1M tokens.

Larger context DeepSeek V4 Flash (free) 1.05M vs 32.77K

DeepSeek V4 Flash (free) has 1.02M more context (32x larger).

Sample workload DeepSeek V4 Flash (free) $0 vs $1.55

DeepSeek V4 Flash (free) is free for the standard workload while the other model is estimated at $1.55.

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

DeepSeek V4 Flash (free) Calculating… Estimated API cost

Nano Banana (Gemini 2.5 Flash 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

DeepSeek V4 Flash (free) has the lower input price; DeepSeek V4 Flash (free) has the lower output price; DeepSeek V4 Flash (free) offers the larger context window. For the 1M input plus 500K output sample, DeepSeek V4 Flash (free) is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0 for DeepSeek V4 Flash (free) and $1.55 for Nano Banana (Gemini 2.5 Flash Image).

Best Fit

Choose DeepSeek V4 Flash (free) when you care most about lower input-token price, lower output-token price, and larger context window.

Choose Nano Banana (Gemini 2.5 Flash Image) 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, DeepSeek V4 Flash (free) is estimated at $0 vs $1.55 for Nano Banana (Gemini 2.5 Flash Image), saving $1.55 (100% lower).
DeepSeek V4 Flash (free) is free for the standard workload while the other model is estimated at $1.55.
DeepSeek V4 Flash (free) is free for input tokens while Nano Banana (Gemini 2.5 Flash Image) costs $0.3 per 1M tokens.
DeepSeek V4 Flash (free) is free for output tokens while Nano Banana (Gemini 2.5 Flash Image) costs $2.5 per 1M tokens.
DeepSeek V4 Flash (free) has 1.02M more context (32x larger).

Head-to-Head Specs

Feature	DeepSeek V4 Flash (free) (DeepSeek)	Nano Banana (Gemini 2.5 Flash Image) (Google)
Input Price prompt tokens per 1M	$0	$0.3
Completion Price per 1M tokens	$0	$2.5
Sample Workload Cost 1M input + 500K output	$0	$1.55
Context Window	1.05M	32.77K
Release Date	2026-04-24	2025-10-07
Popularity	#78	#121

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	DeepSeek V4 Flash (free)	On the standard 1M input plus 500K output workload, DeepSeek V4 Flash (free) is estimated at $0 vs $1.55 for Nano Banana (Gemini 2.5 Flash Image), saving $1.55 (100% lower).
High-volume input processing	DeepSeek V4 Flash (free)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	DeepSeek V4 Flash (free)	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	DeepSeek V4 Flash (free)	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Gemma 4 31B (free) can replace Nano Banana (Gemini 2.5 Flash Image) when lower sample workload cost matters most: $0.
Gemma 4 26B A4B (free) can replace Nano Banana (Gemini 2.5 Flash Image) when lower sample workload cost matters most: $0.
Lyria 3 Clip Preview can replace Nano Banana (Gemini 2.5 Flash Image) when lower sample workload cost matters most: $0.
Lyria 3 Pro Preview can replace Nano Banana (Gemini 2.5 Flash Image) 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.
Owl Alpha offers 1.05M context with $0 sample workload cost.

Popular competitors

DeepSeek V4 Flash · DeepSeek · #1
Hy3 preview · Tencent · #2
Claude Opus 4.7 · Anthropic · #3
Claude Sonnet 4.6 · Anthropic · #4

Cheaper alternatives

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Larger context alternatives

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Provider catalogs

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DeepSeek catalog

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Google catalog

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

Open Google models

DeepSeek V4 Flash (free)

DeepSeek V4 Flash is an efficiency-optimized Mixture-of-Experts model from DeepSeek with 284B total parameters and 13B activated parameters, supporting a 1M-token context window. It is designed for fast inference and...

Nano Banana (Gemini 2.5 Flash Image)

Gemini 2.5 Flash Image, a.k.a. "Nano Banana," is now generally available. It is a state of the art image generation model with contextual understanding. It is capable of image generation,...