Model comparison · Updated 10 Oct 2026

DeepSeek V4.1 Flash vs Gemini 3.5 Flash Lite

DeepSeek V4.1 Flash and Gemini 3.5 Flash Lite cost the same on input, $0.30 per 1M tokens. Both have a 1.05M-token context window. For a support chatbot at 10,000 chats a day, the standard-tier bill is about $243 a month for DeepSeek V4.1 Flash and $360 for Gemini 3.5 Flash Lite.

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ModelsAtlas. “DeepSeek V4.1 Flash vs Gemini 3.5 Flash Lite”. Retrieved 10 Oct 2026. https://modelsatlas.com/compare/deepseek/v4-1/vs/google/gemini-3-5-flash

Model A

DeepSeek V4.1 Flash

by DeepSeek · weights not marked open · GRIDD5

Input / 1M
$0.30
observed We measured
Source
Our catalogue
Retrieved
10 Oct 2026

Output / 1M$1.20

Context1.05M

Model B

Gemini 3.5 Flash Lite

by Google · weights not marked open · GRIDD5

Input / 1M
$0.30
observed We measured
Source
Our catalogue
Retrieved
17 Aug 2026

Output / 1M$2.50

Context1.05M

Key numbers

Standard tier · highlighted = better

DeepSeek V4.1 Flash

Gemini 3.5 Flash Lite

Input / 1M tokens

$0.30

Output / 1M tokens

$1.20

$2.50

Batch input / output

$0.11 / $0.34

$0.15 / $1.25

Context window

1,048,576

Input types

Not disclosed

Weights

Not marked open

Tiers listed

batch, standard

Prices checked

2026-10-10

2026-08-17

What it costs for real workloads

Monthly, standard tier, 30 days

Support chatbot10k chats/day · 1.5k in, 300 out

$243/mo

$360/mo

RAG over documents2k queries/day · 12k in, 500 out

$252/mo

$291/mo

Coding agent300 tasks/day · 60k in, 8k out

$248/mo

$342/mo

DeepSeek V4.1 Flash Gemini 3.5 Flash Lite · Derived from the standard-tier prices above, input and output tokens per request as stated, 30 days. Excludes caching discounts and batch. Try your own numbers.

On the atlas

Price band (A–H) × context band (1–6)

Same square. DeepSeek V4.1 Flash and Gemini 3.5 Flash Lite share D5.

Same square as DeepSeek V4.1 Flash: Gemini 2.5 Flash ($0.30), MiniMax M3 ($0.30), Qwen3.5 Plus 2026-04-20 ($0.30). Open D5

DeepSeek V4.1 FlashGemini 3.5 Flash LiteNearest neighboursOpen weights

View the map as a table (1 squares)

Square	Price band	Context band	Models
GRIDD5	$0.30–1	1M	DeepSeek V4.1 Flash, Gemini 3.5 Flash Lite, Gemini 2.5 Flash, MiniMax M3, Qwen3.5 Plus 2026-04-20, Qwen3.7 Plus, Qwen3.6 Plus

Capabilities side by side

Only what our records list

DeepSeek V4.1 Flash

Gemini 3.5 Flash Lite

Vision input

Not disclosed

Audio input

Not disclosed

Open weights

Not marked open

Batch tier

Supported

Free tier

Not listed

Thinking tier

Not listed

Neither record lists input types, so we do not claim any.

Which should you choose?

Editorial

Choose DeepSeek V4.1 Flash if…

output dominates your bill: $1.20 per 1M output against $2.50
you will batch: its batch rate is 37% of standard against 50%

Choose Gemini 3.5 Flash Lite if…

Nothing in the recorded numbers favours Gemini 3.5 Flash Lite over DeepSeek V4.1 Flash. Pick it for what our records do not cover — your own tests, or an account you already have with Google.

Each reason is a fact from the tables above. Picking between them is our judgement, and we do not benchmark quality: price and context are what we can measure, so test both on your own prompts before you commit.

Questions

Is DeepSeek V4.1 Flash better than Gemini 3.5 Flash Lite?

We do not benchmark quality, so we cannot say. On the recorded numbers: DeepSeek V4.1 Flash and Gemini 3.5 Flash Lite cost the same on input, $0.30 per 1M tokens. Both have a 1.05M-token context window. For a support chatbot at 10,000 chats a day, the standard-tier bill is about $243 a month for DeepSeek V4.1 Flash and $360 for Gemini 3.5 Flash Lite. Which is better for you depends on your task; test both on your own prompts.

Which is cheaper, DeepSeek V4.1 Flash or Gemini 3.5 Flash Lite?

They cost the same on input, $0.30 per 1M tokens. Output is $1.20 for DeepSeek V4.1 Flash and $2.50 for Gemini 3.5 Flash Lite.

How much does each cost per 1M tokens?

DeepSeek V4.1 Flash: $0.30 input and $1.20 output. Gemini 3.5 Flash Lite: $0.30 input and $2.50 output. Standard tier, USD.

Which has the larger context window?

Neither: both have 1,048,576 tokens.

Do both offer batch pricing?

DeepSeek V4.1 Flash lists a batch tier, at 37% of its standard price. Gemini 3.5 Flash Lite lists a batch tier, at 50% of its standard price.

Can both read images or audio?

Input types recorded for DeepSeek V4.1 Flash: none recorded. For Gemini 3.5 Flash Lite: none recorded. Where a record lists none we say so rather than guess; check each vendor's documentation before relying on a capability.

Is either model open-weight?

DeepSeek V4.1 Flash: not marked open-weight in our records. Gemini 3.5 Flash Lite: not marked open-weight in our records.

What would each cost for a support chatbot?

At 10,000 chats a day, 1,500 input and 300 output tokens each, 30 days, standard tier: about $243 a month for DeepSeek V4.1 Flash and $360 for Gemini 3.5 Flash Lite. This is our calculation from the listed prices, not a quote.

About the two models

DeepSeek V4.1 Flash

By DeepSeek. $0.30 input and $1.20 output per 1M tokens, 1.05M context, atlas square D5. Tiers listed: batch, standard.

Full specs & pricing →

Gemini 3.5 Flash Lite

By Google. $0.30 input and $2.50 output per 1M tokens, 1.05M context, atlas square D5. Tiers listed: batch, standard.

Full specs & pricing →

Compare DeepSeek V4.1 Flash with…

Compare Gemini 3.5 Flash Lite with…

Keep going in your AI

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Is DeepSeek V4.1 Flash better than Gemini 3.5 Flash Lite?
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Which is cheaper, DeepSeek V4.1 Flash or Gemini 3.5 Flash Lite?
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How much does each cost per 1M tokens?
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