DeepSeek V4.1 Flash vs GPT-3.5 Turbo Instruct

Price, context window & benchmark comparison

DeepSeek V4.1 Flash

DeepSeek

$0.14 / $0.42

Input / Output · per 1M tokens

GPT-3.5 Turbo Instruct

OpenAI

$1.50 / $2.00

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 7.7× cheaper than GPT-3.5 Turbo Instruct on a typical 3:1 input/output mix. DeepSeek V4.1 Flash has the larger context window (1M vs 4K).

	DeepSeek V4.1 Flash	GPT-3.5 Turbo Instruct
Input price / 1M	$0.14	$1.50
Output price / 1M	$0.42	$2.00
Blended price (3:1)	$0.21	$1.63
Cached input / 1M	$0.0042	—
Context window	1M	4K
Max output	131K	4K
Intelligence index	39.5	—
Coding index	—	—
Providers	26	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	No
Reasoning	Yes	No
Tool calling	Yes	No
Released	2026-09-10	2023-09-28
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash or GPT-3.5 Turbo Instruct?

DeepSeek V4.1 Flash is 7.7× cheaper than GPT-3.5 Turbo Instruct on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs GPT-3.5 Turbo Instruct: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. GPT-3.5 Turbo Instruct: 4,095 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $490.00, GPT-3.5 Turbo Instruct ≈ $4,000.

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