Welcome back, Indexers!
2025 is already shaping up to be a landmark year for AI—and for The Prompt Index. We're seeing major advancements in reasoning models, the rise of deep research agents, the release of Grok 3, and increasing competition from China with players like DeepSeek. But that's not all—The Prompt Index has had some exciting upgrades, too!
In this issue, we'll break down Sam Altman's updated roadmap for OpenAI, show you how to access a powerful deep research tool for free (on par with OpenAI's DeepSearch), and share expert prompting techniques to help you get the most out of reasoning models—including a specially optimised prompt. Plus, we'll cover everything we know about Grok 3 so far.
In This Issue
The Prompt Index Updates - Our brand NEW AI T-Shirt Designer and newly added DeepResearch category!
Write like me (reasoning model optimised) - A prompt refined for reasoning models to make match your tone. If you've tried these types of prompts before, you should try again with a reasoning model!
Innovative Neon Realism - Creative use of Neon from a master of AI art generation leads to stunning visuals.
OpenAI's roadmap explained: We go through the newly released roadmap for OpenAI and what it means
Updated Prompting Guidance (Reasoning Models) - We have gone through the updated guidance from OpenAI on how to get the most out of the latest series of models.
Grok 3 - We cover everything you need to know and how you can use it for free right now.
Free DeepSearch Alternative - OpenAI has competition, and for free users who don't have access, we show you how you can use a Deep Research tool for free.
AI Tools of The Week - ElevenLabs and HeyGen - If you want to clone a virtual version of yourself these two AI tools are an AI match made in heaven!
Latest blogs - Check out our latest blogs
News - Meta's next big bet: Humanoid Robotics, OpenAI Rejects Musk's $97.4B Buyout Offer and Apple's Siri Overhaul Faces Delays Due to Engineering Issues.
The Prompt Index
Over the past three months, I've been working non-stop, and I'm beyond excited to introduce our brand-new AI T-Shirt Designer! It's super easy to use, and the results are incredible—I just got my first T-shirt in the mail, and it looks amazing. Here's how it works:
1. Log in and head to the store.
2. Enter your text-to-image prompt to generate a unique design.
3. Preview your creation by generating a mockup—if you love it, you can order your custom T-shirt instantly!
Check out the store here and unleash your inner T-shirt designer! Every purchase helps support The Prompt Index, funding new features and exciting AI projects.
In other news, we've added a brand-new category: DeepResearch. Explore the Deep Research section here, and if you have any great deep research prompts, we'd love for you to share them with the community. Just log in and submit your best finds!
As always if you have any issues or questions you can reach out to me at steve@thepromptindex.comPrompt
Use this optimised reasoning model prompt to make any AI mimic your writing style and tone with precision. I've used similar prompts on various models over the years, but the latest reasoning models take this to a whole new level. Later in the newsletter, we'll cover best practices and tips to help you get the most out of these advanced models.
Check the prompt out here.
Do you have you got an awesome prompt you want to share? Login to The Prompt Index and click "Submit" and share it with the community. Don't forget! You can also save prompts and access your saved list from anywhere using our Chrome extension, get it here.
Image
Colourful edgy bp of [element] | [keyword] punk design | 3d data particles | 8k resolution | [colour1] and [colour2] | innovative neon realism design | in the middle of the city --style raw --ar 16:9
Don't forget to tag us on X @thepromptindex
Looking for inspiration on your next image, check out our database of image templates and styles here
OpenAI's roadmap
Sam Altman recently shared OpenAI's updated roadmap on X seen here, revealing significant changes in their AI model strategy. Here's what it means for the future of ChatGPT.
GPT-4.5 (Orion) Is Coming Soon
OpenAI's next release will be GPT-4.5, internally called Orion. It is expected to be the last model without chain-of-thought reasoning, meaning future versions will likely be better at step-by-step problem-solving and complex reasoning.
A More Unified AI Experience
One of the biggest takeaways is OpenAI's plan to simplify its offerings. The current model selection system, where users choose between different versions, will be replaced with a seamless AI experience. This could mean an adaptive system that adjusts intelligence levels automatically based on the task rather than requiring manual selection.
GPT-5 Will Integrate O-Series Models
Instead of releasing o3 (Orion-3) as a separate model, OpenAI plans to merge all advancements into GPT-5. This means:
- Automatic tool use, including browsing, coding, and document analysis
- Improved long-term reasoning for complex tasks
- A more intelligent and fluid experience across ChatGPT and the API
- Free Access to GPT-5, With Some Limitations
GPT-5 will be available to free-tier users at a standard intelligence level, subject to usage restrictions to prevent abuse. Plus and Pro subscribers will have access to higher intelligence levels, unlocking more advanced capabilities such as enhanced reasoning, deeper research, and additional features like voice, search, and canvas.
When to Expect GPT-4.5 and GPT-5
Altman stated that GPT-4.5 and GPT-5 are expected in "weeks or months," suggesting that GPT-4.5 could launch relatively soon, with GPT-5 following later in the year.
This roadmap indicates a shift towards a more natural and integrated AI system that requires less user input to function optimally.
Updated Prompting Guidance
Getting the Most Out of Reasoning Models
OpenAI has released an updated guide on how to maximise the effectiveness of their reasoning models. The key takeaways? Keep it simple, use delimiters wisely, and avoid unnecessary step-by-step prompting.
o-series models ("the planners") – Designed for deep reasoning, strategy, and decision-making. Ideal for expert-level fields like math, science, and finance.
GPT models ("the workhorses") – Optimized for speed and efficiency, best for straightforward tasks where cost and response time matter more than perfect accuracy.
When to use o-series models:
✅ Tackling ambiguous or complex problems
✅ Analyzing large, unstructured datasets
✅ Multi-step planning and agentic workflows
✅ Debugging and improving code
✅ Visual reasoning with challenging images
Most AI workflows benefit from using both: o-series for planning and decision-making, GPT models for execution.
Prompting best practices:
✔ Keep instructions clear and direct
✔ Avoid chain-of-thought prompts—these models reason internally
✔ Use delimiters (like XML tags or markdown) to structure inputs
✔ Try zero-shot prompting first; add examples only if needed
✔ Be explicit about constraints and success criteria
Want to see the full guide? Check it out here.
Grok 3
Elon Musk's Grok 3 is here, developed by xAI Grok 3 was launched four days ago. As of February 20, 2025, it is available to all users at no cost for a limited period, a strategic move by xAI to broaden its reach. Access is provided through grok.com or the iOS and Android apps. It likely won't be free for long so if you haven't tried it yet please do!
Key Features
Grok 3's main features include:
Deep Research: Searches and analyses online sources and X posts, delivering detailed, structured responses ideal for complex research tasks.
Image Generation: Powered by the Aurora model, it's actually damn impressive, just ask it to produce an image in chat and check it for yourself. I'd argue it's probably one of the best text to image models available.
Voice Mode: An upcoming feature, (might already on the ios app, but it is anticipated within days of its debut, will introduce voice interaction, enhancing usability across various contexts.
Technical Foundation
Grok 3 is built on xAI's advanced neural network technology, It was trained using the Colossus supercomputer, leveraging substantial computational power to excel in reasoning, coding, and creative outputs. We are still waiting for final benchmarks but what it shows is that the following statement is still true more computer = better results!
Why It Matters
Grok 3 combines powerful research and generative tools, positioning it as a competitor to platforms like OpenAI's DeepSearch and leading image generation systems. It's great for competition, for all AI users it's another option for us to use. Its current free availability offers a unique chance to experience a premium AI model firsthand, so this is especially important for those who don't have or can't afford premium subscriptions to get a taste of a world leading model.
Free Deepsearch alternative
OpenAI isn't the only player in the deep research game—Perplexity AI has just launched Deep Research, a powerful tool for generating in-depth research reports on any topic. Even better? It's available for free with up to 5 queries per day for non-subscribers and a massive 500 queries per day for Pro users.
Why it Matters
Outperforms top AI models – Scored 21.1% on Humanity's Last Exam, beating Gemini Thinking, o3-mini, o1, DeepSeek-R1, and others.
Fast & accurate – Hits 93.9% accuracy on the SimpleQA benchmark while completing most tasks in under 3 minutes.
Combines search, reasoning, and coding – It doesn't just retrieve results; it iteratively refines research into clear, expert-level reports.
What You Can Use It For
Deep analysis in finance, marketing, health, tech, and more
Researching complex, multi-step topics
Generating structured, high-quality insights
How to Try It
Head to Perplexity, then simply select "Deep Research" from the mode selector in the Perplexity search box and get started.
Catch Perplexity's full blog release article here.
AI Tool of the week
ElevenLabs: Clone your voice so that it is indistinguishable to your real voice. There are so many uses for having your voice cloned, coupled up with the AI avatar maker HeyGen and you could automate a youtube channel. When it comes to voice cloning, there isn't a better product on the market.
Check it out here.
HeyGen: The most realistic AI Avatar maker avialable, you can make a an AI avatar clone of yourself with only 2 minutes of video footage and you can create it for free. If you integrate ElevenLabs via the third part integration they offer your can make an indistinguishable clone of your voice to go with your avatar. Scary stuff!
Check it our here.
Looking for other AI tools? Check out our AI tools database here
AI Research
Making AI Safer: How PT-ALIGN Improves Large Language Models Without Extra Human Effort
Traditional AI safety training relies on massive human-labeled datasets, but PT-ALIGN introduces a smarter approach. By training AI with both safe and harmful examples, it learns to self-align with minimal human input—making it more resistant to jailbreaks while staying just as helpful.
Read it here
Feel free to check out all our AI research paper breakdowns here. Visually impaired or just prefer audio? Listen to these breakdowns in podcast format on our youtube channel here.
In The News
Image Credit: Meta
Meta's next big bet: Humanoid Robotics - Meta is forming a new robotics division within Reality Labs to develop AI-powered hardware for humanoid robots. Instead of launching its own branded robots, Meta aims to create AI systems, sensors, and software, partnering with companies like Unitree Robotics and Figure AI. Led by former Cruise CEO Marc Whitten, the team plans to integrate AR and VR data to advance robotics, though consumer-ready models are still years away. Read the article here.
OpenAI Rejects Musk's $97.4B Buyout Offer - OpenAI's board has unanimously rejected a $97.4 billion acquisition bid from a consortium led by Elon Musk, reaffirming that the company "is not for sale." Musk, a co-founder of OpenAI who left in 2019, has been vocal about his concerns over its ties with Microsoft and recently filed a lawsuit against OpenAI and Sam Altman. The bid came with conditions aimed at preventing OpenAI from further commercializing its operations, signalling Musk's push to influence its future direction. Read the article here.
Apple's Siri Overhaul Faces Delays Due to Engineering Issues - Apple's long-awaited Siri upgrade—a key part of its AI-powered Apple Intelligence—has hit engineering roadblocks and software bugs, delaying its release from iOS 18.4 to at least iOS 18.5 in May or later. The revamped Siri is designed to interpret on-screen content and integrate with third-party apps, but internal testing has revealed inconsistent performance. This setback may also slow down Apple's broader AI and smart home plans, including new HomePod mini and iPad-like home hub devices.
Read the article here.
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