Jin Wu

Building @subheroio — next-gen AI subtitles for creators worldwide. OPC founder doing it all: code, product, ops.

[Jin Wu @_Jason_Wu_]

https://t.co/7IVA9UFWEp

[Jin Wu @_Jason_Wu_]

@levi0214 太快了，就速度上的体验和别的模型完全不是一个等级

[Jin Wu @_Jason_Wu_]

@Wangdaso 但是发现一个bug，就是设备锁屏后就断线了

[Jin Wu @_Jason_Wu_]

I recently tried the new DeepSeek V4 Flash, and honestly, it completely blew me away.

Here’s what happened: I had been using OpenAI models when I suddenly received an email saying that cyber abuse had been detected on my account.

I’ve been building a returned-ticket monitoring tool for the Rolex Shanghai Masters. I submitted an appeal right away, but I was also concerned that certain parts of the project might have crossed a line.

So I temporarily switched setups and used OpenCode with DeepSeek V4 Flash to finish some of the remaining optimizations.

My biggest takeaway: this model is seriously capable.
First, the cost is almost unbelievably low.

I used roughly 150 million tokens in total. Since most of them were cache hits, the final bill came to less than RMB 5—under one US dollar. I genuinely had to double-check because I thought I’d read it wrong 😂
Second, it’s incredibly fast.

DeepSeek V4 Flash has very high throughput, and many responses appeared almost instantly. The experience felt remarkably fluid—the model could keep up with the natural pace of my thoughts without long pauses interrupting my workflow.

More importantly, it isn’t just cheap and fast. When handling real optimization work on an actual project, it understood the requirements well and consistently moved the work forward.

Cheap, fast, and genuinely capable.

If you enjoy building fun side projects—or simply want a coding model that is affordable and highly responsive—I strongly recommend giving DeepSeek V4 Flash a try.
An absolute godsend 🙏

[Jin Wu @_Jason_Wu_]

@paulcx @dotey 没有要拉踩的意思，对比一下就知道了，针对名词的修���、断句的优化等等

[Jin Wu @_Jason_Wu_]

@paulcx @dotey 还真的不是这样，里面涉及到了大量的工程，而且���地模型能力和云上的差距也很大。欢迎对比体验。

[Jin Wu @_Jason_Wu_]

@Phoenixyin13 gemini 3.5 flash 幻觉很严重，我产品里还在用 3.1 pro

[Jin Wu @_Jason_Wu_]

宣传一下我自己做的音视频转录、字幕翻译 SaaS：https://t.co/9DJteFmImr

背后采用了一套 ASR + LLM 混合 pipeline，专有名词识别超级准，语义断句也做了专门优化。

不谦虚地讲，无论转录准确度还是断句效果，目前应该都无人能打。
欢迎大家试用，也欢迎拿难搞的素材来挑战一下。

附图是 OpenAI 的 Codex Micro 宣传视频的转录结果直出：

[Jin Wu @_Jason_Wu_]

@paulcx @dotey 可以来试试我做的 https://t.co/I7SgemJUkv

[Jin Wu @_Jason_Wu_]

@dotey 宝玉老师来试试我的商业 SaaS 吗？https://t.co/I7SgemJUkv

[Jin Wu @_Jason_Wu_]

@vista8 都是谁在吹啊？做完了时间线上完全没东西，发个新消息就说缺积分

[Jin Wu @_Jason_Wu_]

@pengchujin 明天看看，和我自己的商业SaaS做个对比

[Jin Wu @_Jason_Wu_]

@zhufengme AI 能力停留在豆包水平？应该是指的豆包的模型水平吧？所以都演示了些什么样的项目

[Jin Wu @_Jason_Wu_]

@abhiijayVinayak I didn’t intentionally choose Bing over Google. I submitted the site to both GSC and Bing Webmaster Tools, but Bing indexed and ranked my new free tool pages much faster. Google traffic is still limited, possibly because the domain is relatively new.

[Jin Wu @_Jason_Wu_]

My SaaS has been live for 4 months, and I finally saw SEO start to move.

I'm still new to SEO, so take this as a founder note, not advice.

Over the last few months, I tried a bunch of things:

- writing blog posts, though not very consistently
- building comparison / alternative pages
- trying programmatic SEO for long-tail pages
- improving titles, descriptions, internal links, multilingual pages, and GEO

I had no ad budget, no existing audience for this product, and no real domain authority.

The surprising part:

free tools worked fastest.

In May, I started shipping dozens of small audio/video/subtitle tools:

video converters, audio tools, YouTube subtitle downloaders, thumbnail downloaders, MP4 to MP3, MKV to MP4, subtitle extractors, compressors, reversers, speed changers, etc.

The BWT screenshot shows the result:

- 15.5k Bing clicks
- 530k impressions
- 2.92% CTR
- from May 26 to Jul 7

PostHog showed the same direction:

Bing search pageviews went from 167 in April to 12.6k in June.

Google is still tiny. Maybe sandbox, maybe new-site trust, maybe I just haven't earned enough authority yet.

My current mental model:

Blog posts explain ideas.
Comparison pages capture selection intent.
Programmatic SEO covers long-tail variations.
Free tools capture urgent tasks.

The tool pages are not "content" in the traditional blog sense, but they answer the exact thing someone is trying to do right now.

"I need to convert this file."
"I need to download this subtitle."
"I need to compress this video."

That might be why they worked before the brand had much authority.

Important caveat:

This probably works better for some SaaS products than others.

SubHero sits next to a lot of tiny media workflows, so free tools are a natural wedge. Not every SaaS has dozens of useful standalone tasks people already search for.

So the question may not be "should every SaaS build free tools?"

It might be:

can your product's workflow be broken into small, useful, searchable jobs?

Curious how other bootstrapped founders think about this:

if you had almost no budget and were starting distribution from zero, how would you try to get the first wave of organic traffic?

[Jin Wu @_Jason_Wu_]

@i_mika_el Yes, some of it did convert. A few of the free tools export subtitles or other audio/video files, so I added a CTA at the end that leads users to try our transcription and translation products. That flow has brought in real signups, not just traffic.

[Jin Wu @_Jason_Wu_]

@lilclimate @dotey 一样，我mac上没显示，pc上有

[Jin Wu @_Jason_Wu_]

@calicastle ui 很漂亮啊，字体也很舒服

[Jin Wu @_Jason_Wu_]

@manateelazycat 9950x3d + 96G + 5090，刚买的半年没咋用，后来开发机迁移过去跑 WSL2 后真香

[Jin Wu @_Jason_Wu_]

@StashAppDev 考虑增加一个单独的 llms.txt 页面吧，然后把所有的链接都指向下？