We’re excited to share a major milestone: the default AI model across all agents has been upgraded to GPT-4.1.
This is more than just a technical update—it’s a step forward in making AI agents a reliable part of everyday work. GPT-4.1 brings sharper instruction-following, faster performance, and lower costs, so teams can depend on their agents with confidence.
If you’ve ever been slowed down by vague responses, inconsistent outputs, or rising costs, this upgrade is designed to change that.
With GPT-4.1, your agents are not only smarter but also more predictable and efficient—helping your teams focus on results, not rework.
The Cost of Unreliable AI Agents
AI is no longer experimental—it runs everyday processes. From onboarding new employees, to supporting sales conversations, to streamlining compliance checks, agents are embedded in critical workflows across every department.
But when AI falters, the impact is immediate:
- Slow responses create frustration and break momentum.
- Inconsistent answers erode trust in the system.
- Higher costs for less dependable performance make scaling harder.
Organizations need AI that performs consistently—balancing reliability, cost, and speed. GPT-4.1 was built to meet this need.
Why This Upgrade Matters to Your Workflows
This upgrade goes beyond an incremental improvement. GPT-4.1 has been refined to follow complex instructions more faithfully, provide answers with greater consistency, and reduce unnecessary errors that disrupt workflows.
Compared to its predecessor, GPT-4o, it also operates more efficiently, lowering the overall cost of running agents without reducing quality. For users, the result is a model that integrates seamlessly into daily operations while offering a more dependable experience.
What Makes GPT-4.1 Different
GPT-4.1 is more than a version number. It represents a stronger foundation for every agent you deploy. Here’s how it helps:
- Sharper instruction-following: Agents better understand and execute prompts, even when complex or detailed.
- More consistent outputs: You’ll see fewer variations between agents and more predictable results across workflows.
- Lower costs: GPT-4.1 reduces operational expenses by 20% compared to GPT-4o, giving you efficiency at scale.
- Automatic rollout: There’s no setup required. Standard and Premium users are already upgraded.
This means less friction for employees, less time wasted for admins, and smoother workflows across the board.
Who Benefits from This Upgrade
This rollout impacts a wide range of users across the platform:
- Standard users who need dependable agents to handle daily tasks without manual oversight.
- Premium users who rely on advanced functionality but don’t have model dropdown access.
- Team admins and builders who design workflows and require agents to follow instructions consistently.
- Organizations scaling AI adoption that want to cut costs while improving reliability and user experience.
If you’re in one of these groups, your agents are already powered by GPT-4.1.
Practical Applications That Showcase the Difference
The upgrade is already live, but its impact will be felt in small, practical ways every day:
- Sales and Customer Success: Faster, more accurate responses in live conversations keep deals moving and reduce missed opportunities.
- HR and Operations: Policy-driven answers that are clear, consistent, and reliable—saving hours of manual clarification.
- Finance and Compliance: Improved precision in complex, high-stakes queries where accuracy is critical.
- Admins and Builders: Predictable agent behavior makes scaling workflows easier, with less time spent testing and troubleshooting.
These improvements might seem small in isolation, but together they add up to stronger business performance across the organization.
The Broader Business Impact
This upgrade is not just a technical improvement—it is a foundation for stronger business outcomes.
Teams that rely on agents every day will see smoother workflows, reduced operational friction, and lower overall costs. Admins and builders gain the assurance of greater predictability, while organizations benefit from efficiency at scale.
By making GPT-4.1 the new default, we’re ensuring that AI is not only powerful, but also practical—ready to serve as a trusted tool across every function.
Getting Started with GPT-4.1
There’s no action required on your part. If you’re a Standard or Premium user, your agents have already been upgraded to GPT-4.1.
Just keep working as usual, and you’ll start noticing:
- Faster response times in everyday interactions.
- Agents that follow your instructions with greater precision.
- More reliable outputs across all workflows.
Ready to Experience the Upgrade?
With GPT-4.1 as the default model, your agents are now equipped to deliver a higher standard of performance. It’s already live—log in, explore your workflows, and see the impact in action.
Experience GPT-4.1 today → https://app.customgpt.ai/register
