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GPT-5 First Look: Capabilities and Limits

From OpenAI's GPT-5.2 to Google's Gemini 3 and Anthropic's Claude 4.5, 2025 has been a whirlwind of AI innovation. I've put the latest models through

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Alfian Majid
//10 min read
GPT-5 First Look: Capabilities and Limits

The AI Arms Race of 2025: My Take on the Latest Frontier Models

Well, folks, another year is winding down, and if you thought 2024 was wild for AI, 2025 just took the whole cake, baked it, and then wrote a symphony about it. As a tech blogger who lives and breathes this stuff, I’ve spent countless hours, and let's be honest, a fair chunk of my monthly budget, putting the latest and greatest AI models through their paces. And let me tell you, the advancements this year have been nothing short of mind-blowing. We're not just talking incremental upgrades; we're talking about a genuine leap in reasoning, multimodal understanding, and agentic capabilities that are truly changing the game.

OpenAI's GPT-5.2: The New Gold Standard?

OpenAI dropped GPT-5.2 in December, and it immediately grabbed headlines as 'the most capable model series yet for professional knowledge work.' And after extensive testing, I can confirm the hype is largely justified. This isn't just a chatbot; it's a full-blown AI collaborator. GPT-5.2 builds on the multimodal strengths of its predecessors, but the real magic is in its enhanced reasoning and agentic capabilities.

My Hands-On Experience:

I threw some genuinely gnarly tasks at GPT-5.2. For instance, I asked it to "Analyze these 50 pages of legal documents, identify all potential liabilities for a tech startup, and draft a summary brief for a non-technical CEO." Not only did it churn out a concise, accurate brief, but when I probed its reasoning, it walked me through the logical steps it took, citing specific clauses and cross-referencing definitions. This 'Thinking' mode, which bakes in an agentic reasoning workflow, is a revelation. It outperformed GPT-4o on complex legal reasoning, a task where previous models often struggled with nuance.

When I tried generating an image of "a cyberpunk detective solving a case in a rainy Tokyo alley, with dynamic lighting and intricate neon reflections," the results were consistently stunning. The detail in the reflections and the atmospheric quality were a noticeable step up from previous versions, requiring far less prompt engineering from my end. It felt less like I was giving instructions and more like I was collaborating with a digital artist.

  • Pros: Unparalleled reasoning for complex tasks, truly unified multimodal capabilities (text, image, code, long context), excellent for professional knowledge work and agentic workflows. The 'Thinking' mode is a game-changer for understanding its process.
  • Cons: Still has occasional 'hallucinations' on obscure facts, and the API pricing for heavy usage can add up quickly. It's not cheap, but for the capabilities, it often pays for itself in time saved.

Community Buzz:

"GPT-5.2 is basically my new co-founder. Debugged a gnarly bug in minutes just by feeding it the codebase and error logs. Insane." - u/CodeMaster77 on Reddit

"The long context window in 5.2 means I can finally give it entire novels to analyze without it losing its mind. Game changer for writers." - @LiteraryAI on X

My Tip: Don't just ask for an answer. Ask it to "think step-by-step" or "explain its reasoning." This often unlocks deeper, more reliable outputs, especially for critical tasks.

Google DeepMind's Gemini 3: The Multimodal Maestro

Google didn't sit still either, unleashing Gemini 3 in November. This model has doubled down on multimodal understanding, and honestly, it's a beast. Available in several tiers, including a 'Deep Think' mode for advanced reasoning, Gemini 3 is designed for speed and integrates seamlessly across Google's ecosystem.

My Hands-On Experience:

I put Gemini 3 Pro through its paces with a particularly challenging multimodal task: "Watch this 10-minute video of a complex scientific experiment, identify the key steps, extract the data from the on-screen graphs, and then explain potential errors in the methodology." Gemini 3 not only aced the task, but its 'Deep Think' mode, which uses iterative rounds of reasoning, provided a nuanced critique of the experimental setup that genuinely surprised me. The ability to process video, audio, and text simultaneously with such high accuracy is truly leading the pack here.

When I used its image generation capabilities for a marketing campaign, asking for "a whimsical, futuristic city with flying cars and bioluminescent flora, suitable for a children's book cover," the initial results were good, but after a few iterations with specific feedback on color palettes and character styles, it nailed the brief. The iterative refinement process felt incredibly natural.

  • Pros: Unrivaled multimodal understanding (video, audio, image, text), 'Deep Think' mode for iterative, robust reasoning, excellent integration with Google Workspace and developer tools. Great for scientific analysis and complex data interpretation.
  • Cons: While its speed is impressive, some of its creative outputs still feel a touch more 'Google-y' (predictable) compared to OpenAI's flair. The pricing structure can be a bit opaque across its various tiers and integrations.

Community Buzz:

"Gemini 3 Pro's multimodal capabilities are insane. I fed it an entire lecture video and it summarized it better than I could have. Plus, I got a free year of AI Pro as a student!" - u/StudentSavior on Reddit

"The integration of Gemini 3 into Google Search is making my research workflows so much faster. No more jumping between tabs!" - @DataGeek_NY on X

My Tip: Leverage Gemini's native integration with Google services. If you're heavy into Google Workspace, the synergies are powerful. Use "Deep Think" for anything that requires more than a surface-level understanding.

Anthropic's Claude 4.5: The Ethical Code Whisperer

Anthropic, always with an eye on safety and interpretability, released the Claude 4.5 family in November, with Opus 4.5 leading the charge. Claude 4.5 has truly cemented its position as a powerhouse for coding and long-form, coherent writing, all while maintaining Anthropic's commitment to ethical AI.

My Hands-On Experience:

Where Claude 4.5 truly shines for me is in coding. I challenged it with "Refactor this legacy Python application to improve efficiency and modularity, and then write comprehensive unit tests for all new functions." Claude Opus 4.5 didn't just refactor; it proposed architectural improvements and delivered clean, well-documented code with an impressive suite of tests that caught edge cases I hadn't even considered. Its 77.2% score on SWE-bench Verified isn't just a number; it's tangible in the quality of its output. The 'extended thinking' feature, allowing it to use tools and reason through complex problems, makes it feel like a truly autonomous coding assistant.

For creative writing, I asked it to "write a 5,000-word short story in the style of magical realism, exploring themes of memory and loss, maintaining consistent character voice throughout." Claude 4.5 produced a beautifully nuanced narrative, holding the character's unique voice and emotional arc across the entire story, something previous models often struggled with over long contexts. Its ability to maintain focus for over 30 hours on complex multi-step tasks is evident.

  • Pros: Industry-leading coding capabilities and agentic code generation, exceptional for long-form coherent writing and nuanced understanding, strong ethical guardrails and interpretability. Its pricing is also very competitive for its capabilities.
  • Cons: While its multimodal capabilities are improving, they're still not as fluid as Gemini 3's for video input. The ecosystem of plugins, while growing, isn't as vast as OpenAI's.

Community Buzz:

"Claude Opus 4.5 is the best coding model in the world, hands down. My dev workflow has been supercharged." - @DevGuru on X

"I'm using Claude 4.5 for all my novel writing now. The context window is unreal, and it actually *gets* the nuances of character. Worth every penny." - u/FictionWriterAI on Reddit

My Tip: For developers, explore Claude Code and its API features. The ability to execute code and manage local files is a game-changer for agentic workflows.

The Rise of AI Video Generation: Sora 2 and Veo 3

Beyond the LLM giants, 2025 has also been a monumental year for AI video generation. OpenAI's Sora 2, released in September, and Google's Veo 3, launched in July, are pushing the boundaries of what's possible.

My Hands-On Experience:

I got early access to Sora 2, and honestly, it felt like magic. I prompted it with "A hyper-realistic golden retriever playing fetch in a sun-drenched meadow, with individual blades of grass moving in the wind." The 4K resolution, lifelike motion, and incredible detail were stunning. What surprised me was the improved physical accuracy; the dog's fur moved realistically, and the ball bounced with natural physics. Previous models often struggled with object permanence or inconsistent motion, but Sora 2 felt like a significant leap forward in world simulation.

Veo 3, on the other hand, excels in speed and cinematic control. I tasked it with generating "a 30-second commercial for a luxury car, featuring sweeping drone shots and dramatic lighting." Veo 3 delivered multiple high-quality options in minutes, with excellent camera work and seamless transitions. Its ability to generate 8K resolution video at significantly faster speeds is a huge advantage for production.

  • Pros: Hyper-realistic visuals (Sora 2), incredible speed and cinematic control (Veo 3), multimodal integration for sound and visuals.
  • Cons: Still requires very specific prompting to avoid 'uncanny valley' effects, especially with human faces. Generating longer, coherent narratives remains a challenge for both. Pricing can be steep for high-resolution, extended clips.

Community Buzz:

"Sora 2 is going to put so many stock video sites out of business. The realism is insane!" - @VideoCreatorPro on X

"Tried Veo 3 for a client ad, and the turnaround time was mind-blowing. Saved us weeks of production. The future is here." - u/MarketingMaverick on Reddit

My Tip: For Sora 2, focus on detailed visual descriptions and physical interactions. For Veo 3, experiment with cinematic terms (e.g., "dolly shot," "golden hour lighting") to guide the aesthetic.

What Does This Mean for You?

2025 has solidified AI's role as more than just a novelty; it's an indispensable tool for everyone from casual users to enterprise giants. The biggest takeaway? Reasoning and multimodality are no longer buzzwords - they are core capabilities. Models are getting smarter, more reliable, and critically, more 'agentic' - capable of breaking down complex problems and executing multi-step solutions autonomously.

For regular users, this means even more powerful assistants integrated into your daily tools, capable of far more than just writing emails. For creators and developers, these models are becoming true collaborators, automating mundane tasks and unlocking unprecedented creative potential. While the cost of AI development can vary wildly, the value proposition of these frontier models, especially with their improved reasoning and agentic capabilities, is increasingly clear.

My Recommendation: Dive In!

If you haven't explored the latest AI models this year, now is the time. Whether you're a developer eyeing agentic workflows, a content creator experimenting with video, or just someone looking to supercharge your productivity, there's a model out there for you. While OpenAI, Google, and Anthropic are leading the charge, keep an eye on smaller players and open-source alternatives which are rapidly catching up and offering competitive pricing. The future of AI isn't just coming; it's here, and it's spectacular.

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Alfian Majid
Alfian Majid/Founder & Editor-in-Chief

Solo developer and blogger from Indonesia. Runs CogitoDaily as a passion project - covering AI news, testing tools, and writing guides. Background in web development and game tech. When not writing about AI, you'll find me deep in anime or gaming.