DeepSeek V4.1 Flash 1017 vs Step 3.5 Flash

Price, context window & benchmark comparison

DeepSeek V4.1 Flash 1017

DeepSeek

$0.098 / $0.29

Input / Output · per 1M tokens

Step 3.5 Flash

StepFun

$0.10 / $0.30

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4.1 Flash 1017 is 2% cheaper than Step 3.5 Flash on a typical 3:1 input/output mix. DeepSeek V4.1 Flash 1017 has the larger context window (1M vs 262K).

	DeepSeek V4.1 Flash 1017	Step 3.5 Flash
Input price / 1M	$0.098	$0.10
Output price / 1M	$0.29	$0.30
Blended price (3:1)	$0.15	$0.15
Cached input / 1M	$0.0029	—
Context window	1M	262K
Max output	393K	66K
Intelligence index	28.6	—
Coding index	—	—
Providers	47	—
Best provider uptime (30m)	100.0%	—
Vision input	Yes	No
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-10-17	2026-01-29
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4.1 Flash 1017 or Step 3.5 Flash?

DeepSeek V4.1 Flash 1017 is 2% cheaper than Step 3.5 Flash on a typical 3:1 input/output mix.

DeepSeek V4.1 Flash 1017 vs Step 3.5 Flash: which has a bigger context window?

DeepSeek V4.1 Flash 1017: 1,048,576 tokens. Step 3.5 Flash: 262,144 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4.1 Flash 1017 ≈ $343.00, Step 3.5 Flash ≈ $350.00.

More comparisons