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Model comparison - Similar price, same tier

DeepSeek V4 Pro vs Gemini 3.8 Flash

DeepSeek V4 Pro is from DeepSeek and Gemini 3.8 Flash is from Google. On list price, DeepSeek V4 Pro charges 1.8x Gemini 3.8 Flash's input price ($1.32 vs $0.75 per 1M tokens), and Gemini 3.8 Flash charges 5% less than DeepSeek V4 Pro for output ($3.75 vs $3.96 per 1M tokens). DeepSeek V4 Pro has a 1,000,000-token context window and Gemini 3.8 Flash 1,048,576 tokens; max output is 393,216 and 65,536 tokens per response. DeepSeek V4 Pro was released on April 24, 2026 and Gemini 3.8 Flash on September 2, 2026. DeepSeek V4 Pro publishes open weights (MIT); Gemini 3.8 Flash is closed-weights.

Last verified from each provider's pricing page. All sources

DeepSeek - Open

DeepSeek V4 Pro
Input / 1M
$1.32
Output / 1M
$3.96
Context
1M

Google - Closed

Gemini 3.8 Flash
Input / 1M
$0.75
Output / 1M
$3.75
Context
1.05M

Side-by-side specs

SpecDeepSeek V4 ProGemini 3.8 Flash
ProviderDeepSeekGoogle
Input / 1M tokens$1.32$0.75
Output / 1M tokens$3.96$3.75
Cache read / 1M$0.044$0.075
Batch input / 1M-$0.375
Batch output / 1M-$1.875
Context window1,000,0001,048,576
Max output393,21665,536
Release date
WeightsOpenClosed
LicenseMIT-
API model iddeepseek-v4-progemini-3.8-flash
AI Gateway iddeepseek/deepseek-v4-progoogle/gemini-3.8-flash
Last verified

Prices in USD per 1M tokens at each provider's standard first-party rate. A dash means the provider does not bill that item separately or no primary page states it.

What each costs in practice

The same three workloads every model page uses, worked from each model's standard list rates. Swap in your own token counts with the math on each model's page.

WorkloadDeepSeek V4 ProGemini 3.8 Flash
One agent session1M input tokens and 100K output tokens, no caching.$1.72$1.13
A chat app10,000 requests a day at 2K input and 500 output tokens each.$46.20$1,386.00 per 30-day month$33.75$1,012.50 per 30-day month
The same session at a 90% cache hit90% of the input is read from the prompt cache. The one-time cache write premium is not included.$0.5676$0.5175
Show the math

DeepSeek V4 Pro

  • One agent sessionInput: 1M x $1.32 = $1.32Output: 0.1M x $3.96 = $0.396
  • A chat appInput: 20M x $1.32 = $26.40Output: 5M x $3.96 = $19.80
  • The same session at a 90% cache hitCached input: 0.9M x $0.044 = $0.0396Uncached input: 0.1M x $1.32 = $0.132Output: 0.1M x $3.96 = $0.396

Gemini 3.8 Flash

  • One agent sessionInput: 1M x $0.75 = $0.75Output: 0.1M x $3.75 = $0.375
  • A chat appInput: 20M x $0.75 = $15.00Output: 5M x $3.75 = $18.75
  • The same session at a 90% cache hitCached input: 0.9M x $0.075 = $0.0675Uncached input: 0.1M x $0.75 = $0.075Output: 0.1M x $3.75 = $0.375

Benchmarks under the same setting

No board in the benchmark directory lists both DeepSeek V4 Pro and Gemini 3.8 Flash under the same setting, so there is no like-for-like score to show here.

Set them up in your tools

Step-by-step guides whose official docs list DeepSeek V4 Pro or Gemini 3.8 Flash by model id.

Model pages

DeepSeekDeepSeek V4 Pro pricing and specsFull rate card, worked cost examples and sources. Open weights.GoogleGemini 3.8 Flash pricing and specsFull rate card, worked cost examples and sources. Closed weights.

FAQ

How do DeepSeek V4 Pro and Gemini 3.8 Flash compare on price?

On list price, DeepSeek V4 Pro charges 1.8x Gemini 3.8 Flash's input price ($1.32 vs $0.75 per 1M tokens), and Gemini 3.8 Flash charges 5% less than DeepSeek V4 Pro for output ($3.75 vs $3.96 per 1M tokens). For one agent session of 1M input and 100K output tokens with no caching, that is $1.72 on DeepSeek V4 Pro and $1.13 on Gemini 3.8 Flash. Prices are each provider's first-party list rates, verified October 17, 2026 and October 17, 2026.

What are the context windows of DeepSeek V4 Pro and Gemini 3.8 Flash?

DeepSeek V4 Pro has a 1,000,000-token context window and Gemini 3.8 Flash 1,048,576 tokens; max output is 393,216 and 65,536 tokens per response.

Are DeepSeek V4 Pro and Gemini 3.8 Flash open weights?

DeepSeek V4 Pro's weights are published at huggingface.co under the MIT. Gemini 3.8 Flash is closed-weights and is called through Google's API as gemini-3.8-flash.

More comparisons

Sources

DeepSeek V4 Pro verified from api-docs.deepseek.com; Gemini 3.8 Flash verified from ai.google.dev. This page is as current as the older of the two: .

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