DeepSeek V4.1 Flash vs Qwen3.5 Plus 2026-02-15

Price, context window & benchmark comparison

DeepSeek V4.1 Flash

DeepSeek

$0.14 / $0.42

Input / Output · per 1M tokens

Qwen3.5 Plus 2026-02-15

Qwen (Alibaba)

$0.26 / $1.56

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash is 2.8× cheaper than Qwen3.5 Plus 2026-02-15 on a typical 3:1 input/output mix. DeepSeek V4.1 Flash has the larger context window (1M vs 1M).

	DeepSeek V4.1 Flash	Qwen3.5 Plus 2026-02-15
Input price / 1M	$0.14	$0.26
Output price / 1M	$0.42	$1.56
Blended price (3:1)	$0.21	$0.58
Cached input / 1M	$0.0042	—
Context window	1M	1M
Max output	131K	66K
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	2026-02-16
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash or Qwen3.5 Plus 2026-02-15?

DeepSeek V4.1 Flash is 2.8× cheaper than Qwen3.5 Plus 2026-02-15 on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash vs Qwen3.5 Plus 2026-02-15: which has a bigger context window?

DeepSeek V4.1 Flash: 1,048,576 tokens. Qwen3.5 Plus 2026-02-15: 1,000,000 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash ≈ $490.00, Qwen3.5 Plus 2026-02-15 ≈ $1,300.

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