API cost decision in 10 seconds

DeepSeek V3.1 Terminus vs Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Pick DeepSeek V3.1 Terminus 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 V3.1 Terminus when budget and context both matter.

On the standard 1M input plus 500K output workload, DeepSeek V3.1 Terminus is estimated at $0.74 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $1.25 (62.7% lower).

Cost-first pickDeepSeek V3.1 Terminus

Context-first pickDeepSeek V3.1 Terminus

Sample savings$1.2562.7%

10x traffic gap$12.55

DeepSeek V3.1 Terminus is cheaper on the standard workload and also has the larger context window. At 10x that traffic, the same price gap is about $12.55. Use the calculator below to replace the sample workload with your own token volume.

Cost sensitivity

Workload Sensitivity

Same prices, different token mixes.

DeepSeek V3.1 Terminus stays cheaper across input-heavy, balanced, and output-heavy sample workloads.

Workload shape	Token mix	Better pick	DeepSeek V3.1 Terminus	Nano Banana 2 (Gemini 3.1 Flash Image Preview)
Input-heavy / RAG	5M input + 500K output	DeepSeek V3.1 Terminus	$1.83	$4
Balanced workload	1M input + 1M output	DeepSeek V3.1 Terminus	$1.22	$3.5
Output-heavy chatbot	1M input + 5M output	DeepSeek V3.1 Terminus	$5.02	$15.5

Cheaper input DeepSeek V3.1 Terminus $0.27 vs $0.5 / 1M

DeepSeek V3.1 Terminus is $0.23 cheaper per 1M input tokens (46% lower; 1.85x difference).

Cheaper output DeepSeek V3.1 Terminus $0.95 vs $3 / 1M

DeepSeek V3.1 Terminus is $2.05 cheaper per 1M output tokens (68.3% lower; 3.16x difference).

Larger context DeepSeek V3.1 Terminus 163.84K vs 131.07K

DeepSeek V3.1 Terminus has 32.77K more context (1.25x larger).

Sample workload DeepSeek V3.1 Terminus $0.74 vs $2

DeepSeek V3.1 Terminus is $1.25 cheaper on the standard workload (62.7% lower).

Estimate your workload cost

Your Workload Cost

Prices are normalized to USD per 1M tokens.

Monthly input tokens Monthly output tokens

DeepSeek V3.1 Terminus Calculating… Estimated API cost

Nano Banana 2 (Gemini 3.1 Flash Image Preview) 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 V3.1 Terminus has the lower input price; DeepSeek V3.1 Terminus has the lower output price; DeepSeek V3.1 Terminus offers the larger context window. For the 1M input plus 500K output sample, DeepSeek V3.1 Terminus is cheaper for the standard workload.

For a 1M input token plus 500K output token workload, the estimated API cost is $0.74 for DeepSeek V3.1 Terminus and $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview).

Best Fit

Choose DeepSeek V3.1 Terminus when you care most about lower input-token price, lower output-token price, and larger context window.

Choose Nano Banana 2 (Gemini 3.1 Flash Image Preview) 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 V3.1 Terminus is estimated at $0.74 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $1.25 (62.7% lower).
DeepSeek V3.1 Terminus is $1.25 cheaper on the standard workload (62.7% lower).
DeepSeek V3.1 Terminus is $0.23 cheaper per 1M input tokens (46% lower; 1.85x difference).
DeepSeek V3.1 Terminus is $2.05 cheaper per 1M output tokens (68.3% lower; 3.16x difference).
DeepSeek V3.1 Terminus has 32.77K more context (1.25x larger).

Head-to-Head Specs

Feature	DeepSeek V3.1 Terminus (DeepSeek)	Nano Banana 2 (Gemini 3.1 Flash Image Preview) (Google)
Input Price prompt tokens per 1M	$0.27	$0.5
Completion Price per 1M tokens	$0.95	$3
Sample Workload Cost 1M input + 500K output	$0.74	$2
Context Window	163.84K	131.07K
Release Date	2025-09-22	2026-02-26
Popularity	#91	#129

Use-Case Decision Matrix

Use case	Better pick	Why
Budget-constrained production	DeepSeek V3.1 Terminus	On the standard 1M input plus 500K output workload, DeepSeek V3.1 Terminus is estimated at $0.74 vs $2 for Nano Banana 2 (Gemini 3.1 Flash Image Preview), saving $1.25 (62.7% lower).
High-volume input processing	DeepSeek V3.1 Terminus	Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill.
Long responses and chatbots	DeepSeek V3.1 Terminus	Lower output-token price matters most when assistants generate many completion tokens.
RAG or long-document work	DeepSeek V3.1 Terminus	A larger context window leaves more room for retrieved passages, conversation history, or source files.

Related Alternatives

Same-provider lower-cost swaps

DeepSeek V4 Flash (free) can replace DeepSeek V3.1 Terminus when lower sample workload cost matters most: $0.
DeepSeek V4 Flash can replace DeepSeek V3.1 Terminus when lower sample workload cost matters most: $0.2.
R1 Distill Qwen 32B can replace DeepSeek V3.1 Terminus when lower sample workload cost matters most: $0.43.
DeepSeek V3.2 can replace DeepSeek V3.1 Terminus when lower sample workload cost matters most: $0.44.

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.
DeepSeek V4 Flash offers 1.05M context with $0.2 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

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DeepSeek V3.1 Terminus

DeepSeek-V3.1 Terminus is an update to [DeepSeek V3.1](/deepseek/deepseek-chat-v3.1) that maintains the model's original capabilities while addressing issues reported by users, including language consistency and agent capabilities, further optimizing the model's...

Nano Banana 2 (Gemini 3.1 Flash Image Preview)

Gemini 3.1 Flash Image Preview, a.k.a. "Nano Banana 2," is Google’s latest state of the art image generation and editing model, delivering Pro-level visual quality at Flash speed. It combines...