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GPT-5.4 Thinking and GPT-5.4 Pro Are Rolling Out in ChatGPT

OpenAI has introduced GPT-5.4 Thinking and GPT-5.4 Pro for ChatGPT users. The new models focus on deeper reasoning, improved accuracy, and better support for AI agents, marking another step in the competition between major AI companies.

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GPT-5.4 Thinking and GPT-5.4 Pro Are Rolling Out in ChatGPT

Just a few days after the release of ChatGPT 5.3 Instant, OpenAI is already moving ahead with the next step. The company has begun rolling out two new models: GPT-5.4 Thinking and GPT-5.4 Pro.

The update is aimed at users who want more reliable answers and stronger performance on complex tasks. Both models are now available to paid ChatGPT users and through the developer API.

Here’s what’s changing and why it matters.

A “Thinking” Model That Takes Its Time

GPT-5.4 Thinking belongs to a category of AI models often called reasoning or thinking models. Instead of responding instantly, the model spends more time working through a problem before producing an answer.

The idea is simple. Slower responses can lead to better ones.

According to OpenAI, the model is designed to handle more complicated tasks such as:

  • Writing and debugging code
  • Managing multi-step workflows
  • Supervising AI agents
  • Analyzing large amounts of information

These capabilities make GPT-5.4 Thinking especially useful in enterprise settings where accuracy matters more than speed.

Built for AI Agents

One of the biggest focuses of GPT-5.4 is agentic work. AI agents are systems that can perform tasks independently, often by planning steps and interacting with other tools.

GPT-5.4 Thinking is optimized to support these kinds of systems. OpenAI says the model uses less compute power when running complex agent tasks. That matters for companies deploying large AI workflows, since lower compute usage usually means lower cost.

The model is also integrated into OpenAI Codex, OpenAI’s coding environment, where developers can use it for programming and automation tasks.

OpenAI’s “Most Factual Model Yet”

One of the most common criticisms of AI systems is hallucination, when a model confidently produces incorrect information.

OpenAI says GPT-5.4 improves on that problem.

Internal benchmarks show that compared with earlier models like GPT-5.2:

  • Responses are 18% less likely to contain errors
  • Individual claims are 33% less likely to be false

Those numbers suggest progress, though the company still recommends verifying important information. AI models can still make mistakes, especially in areas that require current or highly specialized knowledge.

What GPT-5.4 Pro Adds

While GPT-5.4 Thinking focuses on deeper reasoning and enterprise workflows, GPT-5.4 Pro is positioned as a premium version for power users.

It provides:

  • stronger reasoning capabilities
  • better performance on complex prompts
  • improved reliability across long conversations

For users who rely on AI for coding, research, or content creation, the Pro version aims to provide more consistent results.

The Growing AI Rivalry

The release also arrives during an increasingly competitive period in the AI industry.

OpenAI’s biggest rival in the space is Anthropic, the company behind Claude. Both companies are racing to improve reasoning models and win over developers and enterprise customers.

Anthropic’s Claude apps recently climbed to the top positions in mobile app stores, and some users have even started discussing how to move their data from ChatGPT to Claude in online communities.

With GPT-5.4, OpenAI appears to be pushing back by focusing on reliability and agent-focused workflows.

AI and Government Contracts

The broader AI competition also intersects with government partnerships.

Reports suggest that negotiations between AI companies and the U.S. defense sector have intensified. Anthropic previously declined a proposal that would have allowed its AI to be used for surveillance and autonomous weapons support.

OpenAI later stepped in, though CEO Sam Altman stated the company would implement safeguards and limit how its technology could be used by intelligence agencies.

Still, many questions remain about how AI systems from any company might be deployed by government agencies or defense contractors in the future.

What This Means for ChatGPT Users

For everyday users, GPT-5.4 mainly brings two improvements:

  1. Better accuracy when answering complex questions
  2. Stronger reasoning for coding, research, and multi-step tasks

The trade-off is speed. Thinking models typically take a little longer to respond because they process problems more carefully.

If OpenAI’s claims hold up in real-world use, GPT-5.4 could represent another step toward AI systems that are not just fast, but more dependable.

And judging by the rapid release cycle, it probably won’t be the last upgrade we see this year.