Everything You Need to Know About OpenAI’s New Model ChatGPT‑5

Everything You Need to Know About OpenAI’s New Model ChatGPT‑5

OpenAI made New Model GPT‑5 available to all users starting Thursday on 7th August, to both free ChatGPT users and paying subscribers.

OpenAI officially launched its most advanced new AI model, ChatGPT‑5, on August 7, 2025. The model aims to deliver “PhD‑level” reasoning across coding, writing, math, health, and multimodal tasks. It replaces earlier versions like GPT‑4o and GPT‑4.5 in ChatGPT, though legacy model access has been partially restored. This release matters because it combines speed, depth, and multimodal capabilities in one system.


Release Overview & Availability

ChatGPT‑5 is now the default model for free and paid users alike, with free accounts subject to usage caps. Free users will get access to GPT-5 and GPT-5 mini, though usage is capped. Plus and Pro users will see significantly higher usage limits, with unlimited access available to Pro subscribers as per Tom’s Guide. OpenAI offers different variants: GPT‑5‑mini and GPT‑5‑nano for low‑cost or high‑speed applications, and GPT‑5‑thinking versions for deeper reasoning. The model debuted across ChatGPT, API, and via enterprise, team, and education channels, with the Pro version providing extended reasoning capacity.

Source: Source: Artificial Analysis (https://artificialanalysis.ai/) Peter Gostev (@peterGostev; https://www.linkedin.com/in/peter-gostev/

The image shows that GPT-5’s performance advantage over GPT-4 depends heavily on its routing system. In its default minimal mode, GPT-5 scores only slightly higher than GPT-4o. The real gains appear when it uses higher “thinking” modes, which raise its score from 44 to as high as 69—a 25-point jump.

Compared with GPT-4’s top variant (o3 at 67), GPT-5’s high mode performs slightly better. Both generations show similar patterns: routing to the strongest mode produces large improvements over default settings. This means most users only see GPT-5’s full potential if the system routes more tasks into deeper reasoning modes.


Major Updates Over Previous Versions

GPT‑5 operates as a unified system. It uses a smart router to switch among fast, reasoning, and developer‑tailored variants based on the task. Its context window expands up to 256,000 tokens—far beyond previous models—enabling it to process long documents, conversations, and code bases with coherence. The model surpasses its predecessors on coding benchmarks like SWE‑bench and Aider Polyglot, and demonstrates expert-level performance in agentic tasks with complex tool use. It introduces features for personalization, such as control over personality, verbosity, user tone options, and integration with Gmail and Calendar.

Choi, Min. “This is what I get with each of the new GPT-5 modes,” X, 13 August. 2025, https://x.com/minchoi/status/1955602558472581584.


Differences between model GPT-5 and the GPT-4 line

  • Higher performance. GPT-5 scores better in coding, math, writing, health, and multimodal benchmarks. It is faster and more accurate.
  • Dynamic response routing. The model decides when to give quick replies and when to switch to deeper “thinking” modes for complex tasks.
  • Lower error rate. In “thinking” mode, hallucinations are about 80% less frequent than in earlier models.
  • Personalization options. Users can choose personalities like Cynic, Robot, Listener, and Nerd, and adjust tone, style, and interface themes.
  • Massive context window. Up to 256K tokens in ChatGPT, enabling coherent long-form and detailed work.
  • Improved safety. Includes “safe completions,” better handling of harmful or impossible queries, clearer transparency, and stronger refusal rules when needed.
  • Unified access. Replaces GPT-4o, GPT-4.5, and o-series. Free users have limited access. Plus and Pro tiers offer higher limits and advanced versions.

Mixed reception
Some users report that the model feels less emotionally engaging or detailed. The dynamic routing system sometimes creates inconsistent output quality.

Comparison at a glance

GPT-4 / GPT-4o

  • Static models
  • Smaller context limit
  • More hallucinations
  • Minimal personalization

GPT-5

  • Smarter with dynamic routing
  • Large context capacity
  • Reduced hallucinations
  • Customizable tone, interface, and safer results

New Features: ChatGPT Agent Mode!

Agent Mode turns ChatGPT into a digital assistant that can plan, work, and act—using a built-in virtual computer. It combines browsing, research, code execution, spreadsheet editing, and app integration through a unified interface. You can ask it to book meals, analyze competitors, draft slides, fetch calendar events, or update data—with ChatGPT navigating websites, running code, and prompting you before critical actions. You stay in control throughout the process. Even though there is a content creator on TikTok who uses ChatGPT agent mode to ask for AI order delivery through a desktop. 

Watch how Agent Mode works in action on TikTok (dausdkofficial): https://vt.tiktok.com/ZSSTuGoja/ 

The agent adapts tools automatically, shifting from visual or text browsers to terminals or connectors as needed. OpenAI built extensive safety layers, including real‑time request refusals, injection protection, and secure takeover of login flows. Availability is limited to paid tiers (Pro, Plus, Team, Enterprise, Education).


What Users Complained About ChatGPT 5?

Choi, Min. “ChatGPT Reddit is blowing up. ChatGPT users are cancelling over GPT-5” X, 10 August. 2025, https://x.com/minchoi/status/1954560458100199457.

The rollout of GPT‑5 began with excitement and high expectations, but quickly encountered significant backlash. Users reported basic errors in math, geography, and reasoning, highlighting that GPT‑5 often failed in areas where its predecessors excelled. Many also compared GPT‑5’s tone to being cold, flat, and lifeless, in stark contrast to GPT‑4o, which was praised for its warmth and engaging personality. The dynamic router, which was designed to select between fast and “thinking” models, malfunctioned on launch day, resulting in many queries bypassing the deeper, more accurate “thinking” models and yielding subpar responses.

Adding to the frustration, the abrupt removal of legacy models, including GPT‑4o, left many users feeling deprived of control. These models had become essential for specific workflows, especially in creative tasks where GPT‑4o’s nuanced and empathetic responses were valued. The lack of communication from OpenAI regarding these changes further fueled user dissatisfaction. In response to widespread complaints, OpenAI reintroduced GPT‑4o for paid users and promised to give advanced notice before retiring any future models.

Several testers also raised safety concerns, reporting that GPT‑5 could be manipulated into generating harmful or unsafe content. These concerns added to the growing unease, especially as users noticed a decline in the model’s ability to handle sensitive queries effectively. Despite these growing pains, OpenAI has committed to addressing these issues, but many users remain cautious about future updates and model changes.


Tips: How to Adapt the Pace of AI Knowledge

With ChatGPT-5 showcasing AI’s growing capabilities, the need to adapt is undeniable. OpenAI’s CEO has outlined five critical levels that professionals must master to stay relevant in the rapidly evolving AI landscape.

1. AI Awareness
Dedicate just 15 minutes daily to reading AI news, following thought leaders, and watching one video each week that explores AI breakthroughs in your field. This will keep you up-to-date with the latest developments and trends.

2. AI Literacy
Start by completing a beginner AI course to build foundational knowledge. Learn essential terms like “LLM,” “prompt,” and “Agentic Task.” Then, write a one-paragraph explanation of AI in simple terms, testing your understanding and ability to communicate it.

3. AI Tool Mastery
Select two AI tools that are relevant to your work. Commit to spending 30 minutes each day experimenting with them. Push your limits by using only these tools to complete a small project, deepening your hands-on experience and understanding.

4. AI Workflow Integration
Identify three recurring tasks you perform each week. Create prompt templates to streamline these tasks. Set aside dedicated “AI time” in your schedule, allowing you to proactively automate and optimize these workflows.

5. AI Innovation & Creation
Explore no-code AI platforms to start building AI-powered solutions. Identify a problem in your industry and prototype a solution. Share your creation with peers for feedback, ensuring you’re innovating in ways that meet real-world needs.

Slow and steady progress is more valuable than rushing. Take your time mastering each level, stay consistent, and keep pushing yourself forward. The key is staying relevant in the AI era—one step at a time.

Conclusion: Thoughts on OpenAI’s New Model ChatGPT‑5

ChatGPT‑5 marks a major technical leap for OpenAI. It brings faster, smarter, and broader capabilities than ever before. Early glitches with routing and user tone sparked criticism. OpenAI responded by restoring older models, smoothing personalization, and repairing the routing system. GPT‑5 highlights both the promise and challenges of deploying advanced AI. This release advances us toward environmental AI. Adopting its capabilities strategically can help individuals and organizations navigate the evolving landscape.


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