DeepSeek V4.1 Flash vs GPT-5 Pro

Price, context window & benchmark comparison

DeepSeek V4.1 Flash

DeepSeek

$0.14 / $0.42

Input / Output · per 1M tokens

GPT-5 Pro

OpenAI

$15.00 / $120.00

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 196.4× cheaper than GPT-5 Pro on a typical 3:1 input/output mix. DeepSeek V4.1 Flash has the larger context window (1M vs 400K).

	DeepSeek V4.1 Flash	GPT-5 Pro
Input price / 1M	$0.14	$15.00
Output price / 1M	$0.42	$120.00
Blended price (3:1)	$0.21	$41.25
Cached input / 1M	$0.0042	—
Context window	1M	400K
Max output	131K	128K
Intelligence index	39.5	—
Coding index	—	—
Providers	26	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-10	2025-10-06
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash or GPT-5 Pro?

DeepSeek V4.1 Flash is 196.4× cheaper than GPT-5 Pro on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs GPT-5 Pro: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. GPT-5 Pro: 400,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $490.00, GPT-5 Pro ≈ $90,000.

DeepSeek V4.1 Flash vs GPT-5 Pro