DeepSeek V4.1 Flash vs Qwen3.5 397B A17B

Price, context window & benchmark comparison

DeepSeek V4.1 Flash

DeepSeek

$0.022 / $0.40

Input / Output · per 1M tokens

Qwen3.5 397B A17B

Qwen (Alibaba)

$0.60 / $3.60

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 11.6× cheaper than Qwen3.5 397B A17B on a typical 3:1 input/output mix. DeepSeek V4.1 Flash has the larger context window (1M vs 262K).

	DeepSeek V4.1 Flash	Qwen3.5 397B A17B
Input price / 1M	$0.022	$0.60
Output price / 1M	$0.40	$3.60
Blended price (3:1)	$0.12	$1.35
Cached input / 1M	$0.004	$0.12
Context window	1M	262K
Max output	944K	64K
Intelligence index	—	—
Coding index	—	48.2
Providers	36	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	Yes
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-09-10	2026-02-16
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash or Qwen3.5 397B A17B?

DeepSeek V4.1 Flash is 11.6× cheaper than Qwen3.5 397B A17B on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs Qwen3.5 397B A17B: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. Qwen3.5 397B A17B: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $244.00, Qwen3.5 397B A17B ≈ $3,000.

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