OpenAI has introduced expanded user controls within ChatGPT alongside the release of its advanced GPT-5 model. The updated interface now features selectable modes—Auto, Fast, and Thinking—enabling users to adjust responses based on speed and depth of reasoning. This update reflects the company’s push to balance simplicity with customization, incorporating feedback from users on personality, tone, and access to older models.

GPT-5 Emerges as a Smarter, More Adaptive Model

Launched earlier this month, GPT-5 now serves as the default AI model for ChatGPT. It merges a fast-response engine with a deeper reasoning mode capable of handling complex tasks such as coding, nuanced writing, and advanced analysis. The model supports a context window of up to 196,000 tokens, allowing more comprehensive long-form interactions.

GPT-5 is available to all users, with paid plans offering higher usage limits and access to specialized versions like GPT-5 Thinking and lightweight “mini” models for resource-sensitive applications.

New Controls Cater to Diverse User Needs

The introduction of three distinct modes is aimed at enhancing task-specific performance:

• Auto: Operates as the default setting, intelligently routing queries to the most suitable model—fast or deep—based on the complexity of the request.
• Fast: Prioritizes quick turnaround times, ideal for straightforward queries and brief responses.
• Thinking: Activates the deeper reasoning engine for more detailed, complex outputs. This mode is capped at 3,000 messages per week, after which a mini version takes over.

Initially, GPT-5’s smart routing was designed to abstract away complexity for most users. However, demand for manual mode selection—particularly from advanced and professional users—led OpenAI to make these controls directly accessible.

Restoring Familiarity: Legacy Models Return

In response to community feedback, OpenAI reinstated access to legacy models such as GPT-4o, GPT-4.1, and o3 for paying subscribers. Many users expressed a strong preference for GPT-4o, citing its warmth and relatability in interactions. OpenAI acknowledged these sentiments and committed to giving advance notice before retiring models in the future.

Mixed Reception from Users

While GPT-5 has been praised for its improved intelligence, coding skills, and analytical depth, some everyday users noted inconsistencies in handling simpler tasks and a perceived decline in personality compared to earlier versions. OpenAI has since focused on refining GPT-5’s tone to strike a balance between emotional resonance and factual precision.

The return of GPT-4o was also welcomed as it provided continuity for those accustomed to the older model’s style. By allowing users to toggle between legacy and current versions, OpenAI aims to smooth the transition to GPT-5 without alienating its long-standing user base.

Why It Matters for Users and Enterprises

The new control modes and model availability have several implications:

• Flexible User Experience: Everyday users benefit from an intuitive default mode, while advanced users can fine-tune response behavior for specific needs.
• Scalability for Complex Tasks: Professionals in fields like software development, analytics, and creative industries can mandate deeper reasoning for high-stakes tasks.
• Continuity and Adoption: Maintaining access to legacy models eases the shift for those hesitant to adopt GPT-5 immediately.

Looking Forward

OpenAI is continuing to refine GPT-5’s conversational personality, aiming for a tone that is warmer but still focused on delivering accurate, useful information. The company’s roadmap includes deeper per-user customization, potentially allowing individuals and organizations to fine-tune the AI’s behavior beyond the current mode settings.

The broader challenge lies in designing a system that meets the needs of both novice users seeking simplicity and power users requiring advanced customization. As GPT-5 becomes more embedded in personal and professional workflows, the success of these granular controls may influence how AI assistants evolve in the coming years.