claude 3 opus api free - Brave Search

github.com › SreejanPersonal › Claude-3-Opus-Free-Reverse-Engineered-API

GitHub - SreejanPersonal/Claude-3-Opus-Free-Reverse-Engineered-API: Unofficial, open-source Claude 3 Opus API implementation. Free and accessible way to interact with the AI model programmatically, enabling innovative applications and integrations.

Unofficial, open-source Claude 3 Opus API implementation. Free and accessible way to interact with the AI model programmatically, enabling innovative applications and integrations. - SreejanPersonal/Claude-3-Opus-Free-Reverse-Engineered-API

Starred by 35 users

Forked by 8 users

Languages Python 62.5% | Jupyter Notebook 37.5%

reddit.com › r/claudeai › use claude 3 opus from the api to prevent paying a flat $20/month for it

r/ClaudeAI on Reddit: Use Claude 3 Opus from the API to prevent paying a flat $20/month for it

March 27, 2024 -

I highly recommend using Claude 3 Opus from the API, especially if you just want to try it out. It’s not free but the API doesn’t require an upfront flat fee and doesn’t have rate limits etc!

There’s some options for desktop like TypingMind.

For iOS I wanted to suggest my app called Pal Chat that lets you use your own API Key to chat with Claude, and it’s completely free to download: https://apps.apple.com/us/app/pal-ai-chat-client/id6447545085

(The app also has no backend and takes absolutely no usage data. You can verify this by going to the app privacy report in iOS settings!)

Okay... but Opus is $75 per million tokens. For someone that uses it as a chatbot (not night and day by any means), how does that stack up to $20/month (roughly)?

Connecting via the API is often cheaper as you are paying per-use. If you don't use $20 worth of service, then there's no need to be paying $20 per month. For desktop users, LibreChat is good and open source. Can connect to numerous APIs. Installation is slightly technical but clearly described. https://github.com/danny-avila/LibreChat

Videos

Claude 3 API Crash Course for BEGINNERS (Haiku, Sonnet, Opus) - ...

Claude 3 Opus API (Hands-On Intro and Getting Started) - YouTube

Send Images to Claude 3 Opus API - (Easy AI Python Projects) - YouTube

Tool use with the Claude 3 model family - YouTube

Easy AI Python Projects - Build a PDF Prompter App with Claude ...

Send CSV to Claude 3 Opus API - (Easy AI Python Projects) - YouTube

aimlapi.com › build-with-claude-3-opus-api

Build with Claude 3 Opus API

Try Playground Claude 3 Opus API for free

beebom.com › how-access-claude-3-api-opus-sonnet-models-examples

How to Access Claude 3 API for Opus and Sonnet Models (With Examples) | Beebom

October 15, 2025 - Anthropic is offering $5 worth of free API access to users and developers. You can start using the API for Opus and Sonnet models. However, API access for the smallest Haiku model is not available yet.

developer.puter.com › tutorials › free-unlimited-claude-35-sonnet-api

Free, Unlimited Claude API

1 month ago - Getting StartedExample 1: Basic ... to use Puter.js to access Claude's advanced AI capabilities (such as Claude Sonnet 4.5, Claude Opus 4.5, Claude Haiku 4.5) for free, without any API keys, backend, or servers....

apidog.com › blog › claude-3-api

Guide: What is Claude 3 API and How to Use it?

July 28, 2025 - Although the most advanced API model, Claude 3 Opus, surpasses all AI models that exist, all Claude 3 services are not free to use.

anthropic.com › news › claude-3-family

Introducing the next generation of Claude

... Opus and Sonnet are available to use today in our API, which is now generally available, enabling developers to sign up and start using these models immediately. Haiku will be available soon. Sonnet is powering the free experience on claude.ai, with Opus available for Claude Pro subscribers.

segmind.com › models › claude-3-opus › api

Claude 3 Opus API Documentation

Complete API documentation for Claude 3 Opus. Learn how to integrate this model into your applications.

github.com › inmve › free-ai-coding

GitHub - inmve/free-ai-coding: AI coding tools that give free Claude Opus/Sonnet, GPT-5, Gemini Pro, and other pro-grade models

AI coding tools that give free Claude Opus/Sonnet, GPT-5, Gemini Pro, and other pro-grade models - inmve/free-ai-coding

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favtutor.com › articles › claude-3-access

How to Access Claude 3: Anthropic’s AI Models? (Haiku Update)

April 9, 2024 - To get access to Claude 3’s Sonnet, Opus and Haiku models you will need API access. You can get free API access when you log in to Claude 3 via console.anthropic.com.

datacamp.com › tutorial › getting-started-with-claude-3-and-the-claude-3-api

Getting Started with Claude 3 and the Claude 3 API | DataCamp

March 13, 2024 - To access Claude 3 Opus for free, you have to sign up for Anthropic API: console.anthropic.com.

linkedin.com › pulse › prompting-gpt-4-turbo-claude-3-opus-apis-using-r-harvey-lewis-nzaee

Prompting GPT-4-Turbo and Claude-3-Opus APIs using R

March 12, 2024 - For OpenAI's models, you can sign up for platform access here: Product (openai.com) and for Anthropic, it's here: Claude API \ Anthropic (note that Anthropic gives you a free $5 credit, for evaluating their models).

reddit.com › r/claudeai › i made a native ios app that lets you chat with claude 3 opus for free using your own api key

r/ClaudeAI on Reddit: I made a Native iOS app that lets you chat with Claude 3 Opus for free using your own API Key

January 2, 2024 -

I wanted to share my iOS app that lets you chat with Claude 3 Opus for free! You use your own API key, and the app provides the chat interface.

Since the app is powered by your own API Key - that means there's no backend, and the app also supports on-device conversation history. This makes all your chats fully private and secure.

The app also offers API Key access to all the major LLMs like GPT-4 Turbo, Gemini Pro, Mistral Large etc.

App Store Link: https://apps.apple.com/us/app/pal-ai-chat-client/id6447545085?platform=iphone

I get this answer will using Claude API: Error from Claude 3 Opus: Error Domain=NSURLErrorDomain Code=-1011 "(null)" What’s wrong?

Great app! Props for making an actually free iOS app, it's a rare sight these days sadly. I'd like to see Sonnet (and Haiku once it's out) added to the Other Models menu, Opus can get pricy and Sonnet is great for a lot of tasks.

blog.roboflow.com › claude-3-opus-multimodal

First Impressions with the Claude 3 Opus Vision API

March 5, 2024 - In this article, we show the results from our experimentation with the Claude 3 Opus Vision API. Without further ado, let’s get started! ... You can now try Claude for free, no login required, with the Model Playground.

apidog.com › blog › claude-opus-4-1-for-free

How to Use Claude Opus 4.1 for Free in 2025

September 13, 2025 - Anthropic implements a temporary free tier for Claude Opus 4.1. It grants 3 standard requests, which handle basic prompts efficiently.

segmind.com › models › claude-3-opus

Claude 3 Opus Serverless API

Start building with a free account or consult an expert for your Pro or Enterprise needs.

aimlapi.com › home › blog › claude 3 opus

Claude 3 Opus — One API 300+ AI Models | AI/ML API

👉 Claude-3-Opus API excels in complex reasoning, coding, and multilingual communication. 🏷️ Best price for API

OpenAI Developer Community

community.openai.com › gpt builders › plugins / actions builders

Claude 3 Opus through an API to Custom GPT via Action - Plugins / Actions builders - OpenAI Developer Community

March 19, 2024 - Hey all! I was thinking that it would be a pretty neat hack to get Claude 3 Opus to my own GPT through an API so I don’t have to leave ChatGPT to use it. But I had really hard time to get the openapi specification to work. I have the API key stored in the “Authentication” thing they have ...

claude.com › platform › api

Claude Developer Platform | Claude

Use our API to create new user experiences, products, and ways to work with the most advanced AI models on the market. ... “Claude Opus 4.5 handles long-horizon coding tasks more efficiently than any model we’ve tested.

cursor-ide.com › blog › cheapest-claude-api-free-trial

The Ultimate Guide to Finding the Cheapest Claude API in 2025 (with Free Trial) - Cursor IDE 博客

June 28, 2025 - Discover the cheapest ways to access the Claude 3.5 and Claude 3 Opus API in 2025. This guide covers official pricing, free trials, and how to save over 50% with API gateways like LaoZhang.ai.