DeepSeek V4.1 Flash vs o3 Pro

Price, context window & benchmark comparison

DeepSeek V4.1 Flash

DeepSeek

$0.022 / $0.40

Input / Output · per 1M tokens

o3 Pro

OpenAI

$20.00 / $80.00

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 300.4× cheaper than o3 Pro on a typical 3:1 input/output mix. DeepSeek V4.1 Flash has the larger context window (1M vs 200K).

	DeepSeek V4.1 Flash	o3 Pro
Input price / 1M	$0.022	$20.00
Output price / 1M	$0.40	$80.00
Blended price (3:1)	$0.12	$35.00
Cached input / 1M	$0.004	—
Context window	1M	200K
Max output	944K	100K
Intelligence index	—	—
Coding index	—	—
Providers	36	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-10	2025-06-10
Retirement	—	2026-12-11

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash or o3 Pro?

DeepSeek V4.1 Flash is 300.4× cheaper than o3 Pro on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs o3 Pro: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. o3 Pro: 200,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $244.00, o3 Pro ≈ $80,000.

DeepSeek V4.1 Flash vs o3 Pro