API cost decision in 10 seconds

Kimi K2 0905 vs Nano Banana (Gemini 2.5 Flash Image)

Pick Nano Banana (Gemini 2.5 Flash Image) for lower cost; pick Kimi K2 0905 only if the larger context window matters more.

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 Nano Banana (Gemini 2.5 Flash Image) for lower cost; pick Kimi K2 0905 only if the larger context window matters more.

On the standard 1M input plus 500K output workload, Nano Banana (Gemini 2.5 Flash Image) is estimated at $1.55 vs $1.85 for Kimi K2 0905, saving $0.3 (16.2% lower).

Cost-first pickNano Banana (Gemini 2.5 Flash Image)

Context-first pickKimi K2 0905

Sample savings$0.316.2%

10x traffic gap$3

Kimi K2 0905 has more context, but Nano Banana (Gemini 2.5 Flash Image) saves $0.3 on the standard workload. At 10x that traffic, the same price gap is about $3. 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 (Gemini 2.5 Flash Image) stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	Kimi K2 0905	Nano Banana (Gemini 2.5 Flash Image)
Input-heavy / RAG	5M input + 500K output	Nano Banana (Gemini 2.5 Flash Image)	$4.25	$2.75
Balanced workload	1M input + 1M output	Nano Banana (Gemini 2.5 Flash Image)	$3.1	$2.8
Output-heavy chatbot	1M input + 5M output	Nano Banana (Gemini 2.5 Flash Image)	$13.1	$12.8

Cheaper input Nano Banana (Gemini 2.5 Flash Image) $0.6 vs $0.3 / 1M

Nano Banana (Gemini 2.5 Flash Image) is $0.3 cheaper per 1M input tokens (50% lower; 2x difference).

Cheaper output Tie $2.5 vs $2.5 / 1M

Both models report the same output price at $2.5 per 1M tokens.

Larger context Kimi K2 0905 262.14K vs 32.77K

Kimi K2 0905 has 229.38K more context (8x larger).

Sample workload Nano Banana (Gemini 2.5 Flash Image) $1.85 vs $1.55

Nano Banana (Gemini 2.5 Flash Image) is $0.3 cheaper on the standard workload (16.2% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

Kimi K2 0905 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

Nano Banana (Gemini 2.5 Flash Image) has the lower input price; both models tie on output price; Kimi K2 0905 offers the larger context window. For the 1M input plus 500K output sample, Nano Banana (Gemini 2.5 Flash Image) is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $1.85 for Kimi K2 0905 and $1.55 for Nano Banana (Gemini 2.5 Flash Image).

Best Fit

Choose Kimi K2 0905 when you care most about larger context window.

Choose Nano Banana (Gemini 2.5 Flash Image) when you care most about lower input-token price.

Decision Notes

On the standard 1M input plus 500K output workload, Nano Banana (Gemini 2.5 Flash Image) is estimated at $1.55 vs $1.85 for Kimi K2 0905, saving $0.3 (16.2% lower).
Nano Banana (Gemini 2.5 Flash Image) is $0.3 cheaper on the standard workload (16.2% lower).
Nano Banana (Gemini 2.5 Flash Image) is $0.3 cheaper per 1M input tokens (50% lower; 2x difference).
Both models report the same output price at $2.5 per 1M tokens.
Kimi K2 0905 has 229.38K more context (8x larger).

Head-to-Head Specs

Feature	Kimi K2 0905 (MoonshotAI)	Nano Banana (Gemini 2.5 Flash Image) (Google)
Input Price prompt tokens per 1M	$0.6	$0.3
Completion Price per 1M tokens	$2.5	$2.5
Sample Workload Cost 1M input + 500K output	$1.85	$1.55
Context Window	262.14K	32.77K
Release Date	2025-09-04	2025-10-07
Popularity	#70	#121

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	Nano Banana (Gemini 2.5 Flash Image)	On the standard 1M input plus 500K output workload, Nano Banana (Gemini 2.5 Flash Image) is estimated at $1.55 vs $1.85 for Kimi K2 0905, saving $0.3 (16.2% lower).
High-volume input processing	Nano Banana (Gemini 2.5 Flash Image)	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	Tie	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	Kimi K2 0905	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

Kimi K2.5 can replace Kimi K2 0905 when lower sample workload cost matters most: $1.35.
Kimi K2 0711 can replace Kimi K2 0905 when lower sample workload cost matters most: $1.72.
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.

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.
DeepSeek V4 Flash offers 1.05M context with $0.2 sample workload cost.
DeepSeek V4 Pro offers 1.05M context with $0.87 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

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

MoonshotAI catalog

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

Open MoonshotAI models

Google catalog

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

Open Google models

Kimi K2 0905

Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32...

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,...