Introducing Gpt-5.3 Instant, Gpt-5.4 Thinking, and Gpt-5.4 Pro

OpenAI has just launched three new models in its GPT-5 product line – so you can choose the right balance between speed and depth.

• GPT-5.3 Instant is designed for fast, everyday tasks.
• GPT-5.4 Thinking is designed for challenging real-world professional tasks and longer workflows.
• The GPT-5.4 Pro is designed for the most demanding tasks, where you want the highest-performance option.

Gpt-5.3 Instant: More Useful and Natural Everyday Conversations

It's been refined to make everyday conversations easier: more accurate answers, better web search results, and fewer moments of conversation being interrupted or bogged down by constraints.

GPT-5.3 Instant is refined to deliver safe, helpful answers more directly. In practice, this is helpful when you're doing practical work – drafting customer responses, writing internal communications, summarizing policies, or requesting guidance on a sensitive topic where a standard, compliant response is appropriate.

Use the same question twice: once as a 'normal' question, and once with constraints. Compare the speed at which you get useful results.

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GPT-5.3 Instant also improves how it searches for and uses information from the web. It strikes a better balance between what it finds online and its own reasoning—for example, using existing knowledge to contextualize recent updates instead of simply summarizing the results.

More broadly, it's less likely to return a long list of links. It does a better job of recognizing what you're actually asking and highlighting the most important information right from the start, leading to more helpful answers immediately without sacrificing speed or tone.

Choose a topic where timeliness is important (competitor changes, regulatory updates, product announcements) and request a summary ready for decision-making.

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• Ask the same question but change just one variable: 'for the finance team' versus 'for the support team'.
• You will see the same information, but with different focus and meaning.

A Smoother and More Direct Style of Conversation

This update features a more focused yet natural conversational style. It eliminates unnecessary statements and stays closer to the task you're trying to accomplish.

As always, you can adjust how the model responds – such as its warmth and enthusiasm – in the settings.

Use ChatGPT as a 'tight editor' for what you actually send.

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Creative Writing Becomes More Powerful, with Greater Scope and Nuance

GPT-5.3 Instant is also better at writing that requires tone and variety – useful for internal reports, product launch notes, scripts, and longer drafts where you want the writing to be less formulaic but still clear.

Transform a dry outline into two separate drafts for you to choose from.

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Gpt-5.4 Thinking: Designed for Challenging, Real-world Professional Tasks

GPT-5.4 Thinking is designed for tasks that are difficult to accomplish all at once: multi-step reasoning, lengthy context, multi-tool workflows, and output that needs to be precise and useful. In ChatGPT, this is the smartest and most efficient model for demanding professional tasks – better at delivering what you actually need with less back-and-forth interaction.

It also brings more powerful programming capabilities to the leading-edge model and is built to handle longer, multi-tool workflows with lower latency.

Better Performance in Long, Multi-tool Workflows

When your task goes through multiple steps—gathering context, using tools, verifying, and then generating the final output—GPT-5.4 Thinking is refined to maintain consistency and complete the workflow more reliably.

Use it for a work task that typically involves multiple 'back and forth' trips.

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Improve Computer Usage and Search Tools (for Agent Tasks)

GPT-5.4 introduces improved computing capabilities, allowing agents to interact with software to complete and verify real-world tasks. It also improves 'tool search,' enabling agents to scale to larger tool ecosystems without paying for tokens or intelligence.

Please provide a workflow involving the tools/systems, and request a verifiable plan with verification steps.

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Gpt-5.4 Pro: the Premium Option for the Most Demanding Tasks

GPT-5.4 Pro is the most expensive and capable option in this suite. Use it for tasks where quality and depth are prioritized over speed—especially when the output needs to be readily available for decision-making or difficult to modify later.

Use it when the output needs to be 'operator-safe' with a low number of iterations.

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Availability

• GPT-5.3 Instant is available in ChatGPT for the Plus, Pro, Business, and Enterprise/Edu plans (and will be rolled out to additional plans soon).
• GPT-5.4 Thinking is available in ChatGPT (Plus, Pro, Business, Enterprise) and is also available to developers in the API and Codex.
• GPT-5.4 Pro is now available for Pro and Enterprise users, and is also available to developers in the API and Codex.

API Model Identifier (for developers)

• GPT-5.3 in API: gpt-5.3-chat-latest
• GPT-5.4 in API: gpt-5.4 and gpt-5.4-pro