Microsoft has integrated OpenAI’s brand‑new GPT‑5 model into Copilot for Windows, introducing a “Smart” mode that automatically routes complex queries to the model’s deep‑reasoning variant—and early hands‑on tests suggest the Copilot implementation is far more generous with those powerful “Thinking” calls than OpenAI’s own ChatGPT free tier. The rollout, confirmed by The Verge on August 7, 2025, extends across the Microsoft 365 Copilot, GitHub Copilot, and Azure AI Foundry simultaneously, but it’s the OS‑level assistant on Windows 11 where users are discovering a surprising practical advantage: free, frequent access to advanced reasoning that normally costs $20 a month on ChatGPT Plus.
The smart mode itself is a server‑side driven, model‑agnostic orchestrator. Copilot’s backend router decides on the fly whether a prompt needs the full GPT‑5 model, the lighter GPT‑5‑mini, or the compute‑heavy GPT‑5 Thinking variant. No client update is required; users simply sign in to copilot.microsoft.com or the Copilot app, and if their account has been switched on, the “Smart” option appears in the compose UI. Microsoft’s announcement, detailed in a company blog post and covered by The Verge, frames this as a way to “let the assistant pick the right model for the task” without burdening the user with manual toggles.
What Microsoft hasn’t said publicly is how many deep‑reasoning calls a free Copilot user gets. OpenAI, by contrast, publishes explicit limits: free ChatGPT users are capped at about 10 GPT‑5 messages per five hours and a single GPT‑5 Thinking message per day, after which the service falls back to GPT‑5‑mini. Paid plans raise those ceilings substantially. Independent testing by WindowsLatest and others found Copilot frequently invoked GPT‑5 Thinking multiple times in a single day—three to five Thinking calls before silent fallback—dramatically exceeding ChatGPT’s single daily allowance. The testers also noted that for standard (non‑Thinking) prompts, Copilot appeared to stick with the full GPT‑5 model much longer than ChatGPT would, rather than prematurely dropping to mini.
These observed behaviors are not backed by a Microsoft‑published quota table. Instead, they paint a picture of a more permissive default posture—one that community watchers say aligns with Microsoft’s historical pattern of offering free access to advanced reasoning models in Copilot without hard daily caps, at least initially. Multiple Microsoft community threads describe free, uncapped access to earlier “Think Deeper” or o‑series reasoning features, though the company always reserves the right to throttle during capacity peaks and to prioritize paying enterprise customers. The opacity of the current arrangement is a recurring theme in user reports: Copilot provides no clear “X of Y Thinking calls remaining” indicator; users simply receive a silent model switch or an error when limits are transiently hit.
The gap between ChatGPT’s transparent quotas and Copilot’s black‑box routing becomes a practical issue for anyone who depends on reproducible, audit‑ready AI assistance. In regulated fields—finance, legal, healthcare—an assistant that can sometimes reason deeply but sometimes quietly downgrade without warning undermines confidence in its outputs. Microsoft 365 Copilot, with its enterprise governance controls, tenant‑level data loss prevention, and explicit service descriptions, is the intended route for those scenarios. Free consumer Copilot, despite its generous reasoning allowance, should be treated as a powerful but non‑deterministic productivity aide.
To try GPT‑5 Smart mode, Windows users should open copilot.microsoft.com in Edge or launch the Copilot app, sign in, and look for the “Smart” option in the model picker. Complex, multi‑step prompts are most likely to trigger the Thinking pathway. If the option doesn’t appear, it’s a server‑side rollout delay; clearing caches or signing out won’t force it. Once live, the mode brings tangible benefits: better code explanations, richer document summarization, and multi‑turn conversations that stay on track longer—all without leaving the desktop.
For IT administrators and power users, the recommendation is twofold. First, enable Microsoft 365 Copilot licensing and configure DLP policies wherever sensitive content is involved; the opaque routing of consumer Copilot is not suitable for regulated workflows. Second, monitor usage patterns and capture assistant transcripts when possible, to build an internal record of how the model was used in critical decisions. Microsoft has not published a consumer‑grade quota for GPT‑5 Thinking calls, so planning should assume variability and the possibility of future caps.
The bigger picture is one of democratization with a trade‑off. Putting GPT‑5’s structured reasoning inside an OS‑level assistant without a paywall lowers the barrier to high‑quality AI assistance for millions of Windows users. The integration is seamless—Copilot sits in the taskbar and Microsoft 365 apps, ready to context‑aware tasks without browser tab juggling. Yet the lack of explicit, stable quotas and the silent model‑switching architecture mean users and organizations must pair enthusiasm with good governance hygiene. As the rollout continues and Microsoft eventually documents formal limits (or as independent testers compile more data), the real story will be whether the free‑tier generosity lasts or tightens under production load.
In the meantime, the Copilot app is the best lab. Ask it a thorny logic puzzle, a multi‑file code review, or a dense legal summary, and watch whether the Thinking spinner appears. That real‑world experience—not just the press release—will define how comfortably GPT‑5 settles into everyday Windows work.