Shadowing Practice: 5 open source tools that replaced my $320/mo AI stack... - Learn English Speaking with Video
Creando lección...
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Recently, I did some math, and it made me realize how broken the world is.
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A cursor, $20.
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Claude Max, $100.
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GPT Pro, another $100.
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Gemini Ultra, another $100.
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Not to mention 11 Labs, DeepSeq, and all the API keys I signed up for two years ago and forgot about.
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My AI addiction got so expensive that I had to quit alcohol and Zin.
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And I'm not the only one, because alcohol sales in the United States are currently sitting at historic lows.
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And Big AI is the one to blame for this.
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But that was my wake-up call, and since then, I've cancelled all these subscriptions, and now self-host the ultimate AI stack for developers that's not only cheaper, but far more productive.
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In today's video, we'll look at a bunch of free and open-source projects you can run on your own server.
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We'll make them work together, while still having the option to tap into the intelligence of big models like Claude and GPT Sol.
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It is September 7th, 2026, and you're watching The Code Report.
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The first tool we need to talk about is OLAMA, because every AI stack first needs a model.
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For most people, this means sending your proprietary code to a trillion dollar corporation and trusting them to keep it totally safe, or you can use OLAMA and do everything locally.
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I've talked about this tool many other times on the channel, and essentially it's like Docker for large language models.
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It gives you a simple command line interface and API for downloading and running models on your own machine.
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This is great if you want to try out the latest Chinese models or any other open weight models, and what's even better is that all your prompts stay private and the inference cost is zero,
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which means the model continues to work even after your credit card is declined.
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The big problem, though, is that you probably don't own the hardware to run anything close to state-of-the-art.
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The small models will run almost anywhere, but running a frontier-sized model would require a small data center, and that's a big problem if you're a Vibe engineer who needs to write top-tier slot.
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Luckily, there's a self-hostable solution to this called 9Router, which is an AI tool that sits between your AI tools and dozens of different model providers through one local endpoint.
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Instead of juggling nine different API keys, 9Router provides one door with an OpenAI compatible proxy that allows you to point everything through localhost.
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But the thing that's really cool about 9Router is fallback tiers.
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On tier one, you might have an existing subscription like Claude Max that you already pay for.
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Then on tier two, you might have a cheap pay-per-token OpenAI model as a backup.
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Then tier three has all of free providers like Chinese models, vertex trial credits, and so on.
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That means if you max out Claude Max, it'll automatically roll over to the next tier without you having to do anything.
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But in addition to that, 9Router also tracks usage and will compress your tool output to reduce token consumption, which will ultimately save you a bunch of money.
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But if you're still eating billions of tokens per day, then you need to know about Headroom, which is a context compression layer for AI agents.
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You ask AI to center a div, and to do that, it reads 50,000 lines of your package lock JSON file, then it evaporates an Olympic-sized swimming pool worth of water,
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just to realize it needs to install Tailwind CSS.
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Headroom sits between your application and the model provider,
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and compresses everything from tool outputs to log files and any other useless chunks before it actually goes to the model, which would be billable input tokens.
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And one clever design feature of this tool is that it's reversible.
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The compressed content that ships to the model is cached on your local machine, which means if the model ever needs it, it can always retrieve it.
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This sounds awesome, but at this point, you might be wondering, where do I deploy all this stuff?
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Well, the answer, of course, is Hostinger, the sponsor of today's video.
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Not only is it one of the most affordable places to host your own virtual private server, but they also have an entire Docker catalog built into the panel,
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which means every single open source project I talk about in this video can be hosted there with a single click.
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In fact, you could have all these tools running and working together on the same VPS.
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Head over to hostinger.com slash fireship and use my coupon code to save a bunch of money spinning up your own VPS.
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Once you have that done, the next tool you'll want to install there is Diffy.
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Everything we've talked about so far is infrastructure, but now it's time to build an actual app that'll make us rich.
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Instead of trying to engineer everything through prompts, Diffy is a visual builder that allows us to drag nodes on a canvas.
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This has been a game changer for Horse Tinder and its AI matchmaking feature.
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The app will send Diffy each horse's profile information, then a visual workflow retrieves compatible horses from the database, and uses a large language model to explain each match.
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Like Thunder and Butternuts are a 94% match because they both enjoy trail rides and biting children.
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Then the entire workflow is exposed as an API, so the front-end application can just call it whenever a horse swipes right.
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Amazing, but building apps as a human became outdated in Q2 2026 after the release of open hands
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which is an open source tool
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that allows you to fire yourself this tool is a top performing autonomous coding agent on swebench verified
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which is the benchmark where models fix real github issues instead of trying to build
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and fix things just open up github issues
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and let open hands do all the work essentially it gives
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you a command center where you can self-host an army of ai agents
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that are always on and working in the background and because Because it's running on your own virtual private server, you have the option to run it with OpenAI or Anthropic models,
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or use the local LLMs that you installed earlier with OLAMA.
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And now at this point, we have our own private AI stack that could build any type of software you can imagine.
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But this is just the tip of the iceberg, and there's tons of other open source applications in Hostinger's Docker catalog that you can install with zero hassle.
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Check out the link below
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and use coupon code Fireship to get your own virtual private server on Hostinger up and running right now.
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This has been the Code Report, thanks for watching, and I will see you in the next one.
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Vocabulario y notas de pronunciación para esta lección
Esta lección de conversación de nivel B2 se basa en el vídeo “5 open source tools that replaced my $320/mo AI stack..”. Las palabras que más se repiten: model, tool, tier, code, private. Este vídeo tiene 63 frases y 1161 palabras para practicar shadowing. La parte hablada dura 5:22. El hablante habla rápido, unas 217 palabras por minuto, así que espera sonidos enlazados y reducidos. Solo el 80 % de las palabras está entre las 3.000 más comunes del inglés, por lo que el vocabulario es exigente.
Vocabulario clave de este vídeo
Las 15 palabras más avanzadas del vídeo, con su pronunciación y significado:
| Palabra | Pronunciación | Significado |
|---|---|---|
| tier sustantivo | /ˈtɪɚ/ | piso, rango |
| token sustantivo | /ˈtoʊkən/ | seña |
| compress verbo | /ˈkɑmpɹɛs/ | comprimir |
| stack sustantivo | /stæk/ | pila, montón |
| provider sustantivo | /pɹəˈvaɪ.də(ɹ)/ | suministrador, proveedor |
| install verbo | /ɪnˈstɔl/ | instalar |
| hosting sustantivo | /ˈhoʊstɪŋ/ | hosting (houstin), hospedaje |
| retrieve verbo | /ɹɪˈtɹiːv/ | recobrar |
| prompt verbo | /pɹɑmpt/ | llevar a, concitar |
| coupon sustantivo | /ˈkuːˌpɑn/ | cupón |
| catalogue sustantivo | /ˈkæt.əˌlɔɡ/ | catálogo |
| compatible adjetivo | /kəmˈpæt.ə.bəl/ | compatible |
| subscription sustantivo | /səbˈskɹɪpʃən/ | abono, suscripción |
| cursor sustantivo | /ˈkɜːsə/ | cursor |
| endpoint sustantivo | punto extremo, extremo |
Phrasal verbs que vas a escuchar
| Palabra | Pronunciación | Significado |
|---|---|---|
| check out verbo | investigar, chequear | |
| try out verbo | probar, ensayar | |
| wake up verbo | /ˌweɪk ˈʌp/ | despertarse, recordar |
Gramática en este vídeo
Las estructuras que más usa el hablante, con las palabras exactas del vídeo:
| Estructura | En el vídeo |
|---|---|
| Present perfect have/has + participio pasado — una acción pasada que sigue importando ahora | I've cancelled · I've talked · we've talked |
| Voz pasiva be + participio pasado — importa lo que ocurre, no quién lo hace | is declined · is cached · can be hosted |
| Oraciones de relativo who / which + oración — información extra sobre una persona o cosa | consumption, which will · Headroom, which is · machine, which means |
Pronunciación a tener en cuenta
El hablante usa 13 contracciones y formas reducidas, como you're, I've, we'll. Dilas en su forma corta, tal como las oyes.
- Los sonidos de “sh” y “zh”: subscription /səbˈskɹɪpʃən/, benchmark /ˈbɛn(t)ʃmɑːk/, cache /kæʃ/, compression /kəmˈpɹɛʃ.ən/, addiction /əˈdɪkˌʃən/
- Palabras largas — cuida el acento: compatible /kəmˈpæt.ə.bəl/, evaporate /ɪˈvæp.ə.ɹeɪt/, reversible /ɹəˈvɜː(ɹ)sɪbəl/, proprietary /pɹəˈpɹaɪ.ə.tə.ɹi/, autonomous /ɔˈtɑnəməs/
Sonidos difíciles para hispanohablantes:
- s + consonante al inicio — sin añadir una “e” delante: stack /stæk/, swipe /swaɪp/, sponsor /ˈspɒn.səː/, slot /slɑt/
- /v/ — no es /b/: los dientes tocan el labio inferior: provider /pɹəˈvaɪ.də(ɹ)/, retrieve /ɹɪˈtɹiːv/, evaporate /ɪˈvæp.ə.ɹeɪt/, reversible /ɹəˈvɜː(ɹ)sɪbəl/, vertex /ˈvɝˌtɛks/
- /dʒ/ — no es la “y” ni la “ch”: changer /ˈt͡ʃeɪnd͡ʒɚ/, juggling /ˈd͡ʒʌɡəlɪŋ/
Cómo practicar con este vídeo
- Escucha el vídeo entero una vez sin hablar y anota las palabras que no conoces.
- Empieza a velocidad 0,75×, haz shadowing frase por frase y vuelve a la velocidad normal cuando te resulte fácil.
- Grábate y compara con el original, prestando atención a palabras como tier, token, compress.
¿Qué es la Técnica de Shadowing?
Shadowing es una técnica de aprendizaje de idiomas respaldada por la ciencia, desarrollada originalmente para la formación de intérpretes profesionales y popularizada por el políglota Dr. Alexander Arguelles. El método es simple pero poderoso: escuchas audio en inglés nativo y lo repites en voz alta de inmediato, como una sombra que sigue al hablante con solo 1-2 segundos de retraso. A diferencia de la escucha pasiva o los ejercicios de gramática, el shadowing obliga a tu cerebro y músculos de la boca a procesar y reproducir simultáneamente patrones de habla reales. Las investigaciones muestran que mejora significativamente la precisión de la pronunciación, la entonación, el ritmo, el habla conectada, la comprensión auditiva y la fluidez al hablar, convirtiéndola en una de las metodologías más efectivas para la preparación del IELTS Speaking y la comunicación en inglés en el mundo real.