DeepSeek V4 Flash 0731 vs gpt-oss-120b

Price, context window & benchmark comparison

DeepSeek V4 Flash 0731

DeepSeek

$0.03 / $0.32

Input / Output · per 1M tokens

gpt-oss-120b

OpenAI

$0.15 / $0.60

Input / Output · per 1M tokens

Compare different models

Verdict: DeepSeek V4 Flash 0731 is 2.6× cheaper than gpt-oss-120b on a typical 3:1 input/output mix. DeepSeek V4 Flash 0731 scores higher on the Artificial Analysis Intelligence Index (34.3 vs 11.6). DeepSeek V4 Flash 0731 has the larger context window (1.3M vs 131K).

	DeepSeek V4 Flash 0731	gpt-oss-120b
Input price / 1M	$0.03	$0.15
Output price / 1M	$0.32	$0.60
Blended price (3:1)	$0.10	$0.26
Cached input / 1M	$0.016	$0.075
Context window	1.3M	131K
Max output	944K	66K
Intelligence index	34.3	11.6
Coding index	69.1	30.4
Providers	30	—
Best provider uptime (30m)	100.0%	—
Vision input	No	No
Reasoning	Yes	Yes
Tool calling	Yes	Yes
Released	2026-07-31	2025-08-05
Retirement	—	—

Cost calculator

Input tokens / requestOutput tokens / requestRequests / day

FAQ

Which is cheaper, DeepSeek V4 Flash 0731 or gpt-oss-120b?

DeepSeek V4 Flash 0731 is 2.6× cheaper than gpt-oss-120b on a typical 3:1 input/output mix.

DeepSeek V4 Flash 0731 vs gpt-oss-120b: which has a bigger context window?

DeepSeek V4 Flash 0731: 1,310,720 tokens. gpt-oss-120b: 131,072 tokens.

How much would 1 million requests cost?

At 2,000 input + 500 output tokens per request: DeepSeek V4 Flash 0731 ≈ $220.00, gpt-oss-120b ≈ $600.00.

More comparisons