Which is cheaper, DeepSeek-V4-Flash or Gemini 3.1 Pro?

DeepSeek-V4-Flash. On a task of 1,500 input and 500 output tokens across 3 calls, DeepSeek-V4-Flash costs $0.00396 per task against $0.02700 for Gemini 3.1 Pro, which makes it 6.82x cheaper (a 85% saving).

How much do DeepSeek-V4-Flash and Gemini 3.1 Pro charge per million tokens?

DeepSeek-V4-Flash: $0.44 per million input tokens and $1.32 per million output tokens. Gemini 3.1 Pro: $2 input and $12 output. These are published list rates as of August 2026, excluding cached, batch and long-context tiers.

What does a million tasks cost on DeepSeek-V4-Flash vs Gemini 3.1 Pro?

At the same fixed profile, one million tasks cost $3,960 on DeepSeek-V4-Flash and $27,000 on Gemini 3.1 Pro. The gap comes entirely from list-price differences, not from any difference in the work done.

Model price comparisons · August 2026

DeepSeek-V4-Flash vs Gemini 3.1 Pro: API pricing compared

Same task, same tokens, two invoices. Every figure on this page is computed from our open pricing dataset, not copied from a blog post.

DeepSeek-V4-Flash is 6.82x cheaper than Gemini 3.1 Pro on a realistic task profile of 1,500 input and 500 output tokens per call, 3 calls per task: $0.00396 against $0.02700 per task, a 85% saving on identical work. Run a million tasks a month and that is the difference between $3,960 and $27,000.

Model	Input $/1M tok	Output $/1M tok	Output multiple	$/task	$/1M tasks
DeepSeek-V4-FlashDeepSeek · value	$0.44	$1.32	3x	$0.00396	$3,960
Gemini 3.1 ProGoogle · frontier	$2	$12	6x	$0.02700	$27,000

Monthly bill at three volumes

Tasks / month	DeepSeek-V4-Flash	Gemini 3.1 Pro	Gap
10,000	$40	$270	$230
100,000	$396	$2,700	$2,304
1,000,000	$3,960	$27,000	$23,040

Where the money goes on each

DeepSeek-V4-Flash prices output at 3x its input rate, so on this profile output is 50% of its task cost. Gemini 3.1 Pro prices output at 6x input, putting output at 67% of cost. The model with the higher output multiple rewards capping response length more; the one with the higher input share rewards prompt caching and context trimming more. Cost tells you nothing about quality: run both on twenty of your real cases before deciding, and treat the cheaper model as the default until it demonstrably fails.

Break-even against a dedicated GPU

Against a $2/hour dedicated instance ($1,460/month fixed), self-hosting overtakes DeepSeek-V4-Flash at 368,687 tasks per month and overtakes Gemini 3.1 Pro at 54,074 tasks per month. The full method is in the self-hosting break-even guide.

Pricing the self-hosted side? Compare on-demand GPU rates:

Compare GPU cloud pricing →

Plug your own token counts into the $/task calculator, or read the full ten-model pricing comparison.

Compare against other models

Frequently asked

Which is cheaper, DeepSeek-V4-Flash or Gemini 3.1 Pro?: DeepSeek-V4-Flash. On a task of 1,500 input and 500 output tokens across 3 calls, DeepSeek-V4-Flash costs $0.00396 per task against $0.02700 for Gemini 3.1 Pro, which makes it 6.82x cheaper (a 85% saving).
How much do DeepSeek-V4-Flash and Gemini 3.1 Pro charge per million tokens?: DeepSeek-V4-Flash: $0.44 per million input tokens and $1.32 per million output tokens. Gemini 3.1 Pro: $2 input and $12 output. These are published list rates as of August 2026, excluding cached, batch and long-context tiers.
What does a million tasks cost on DeepSeek-V4-Flash vs Gemini 3.1 Pro?: At the same fixed profile, one million tasks cost $3,960 on DeepSeek-V4-Flash and $27,000 on Gemini 3.1 Pro. The gap comes entirely from list-price differences, not from any difference in the work done.