The new ChatGPT Sites plugin allows small businesses to quickly build hosted websites, but the faster usage drain at higher thinking levels could unexpectedly increase software costs.
What’s GPT-5.6 and what changed?
OpenAI released GPT-5.6, which merges the macOS and Codex apps into a single combined desktop application called ChatGPT Work.
This update also introduces a new plugin called ChatGPT Sites for building hosted websites with an optional Login with ChatGPT feature. The GPT-5.6 series includes 3 models named Luna, Terra, and Sol, and each model operates across 5 thinking levels, including light, medium, high, xhigh, and max. A new Ultra mode allows the models to utilize subagents for complex tasks, and OpenAI reset usage 4 to 5 times over a weekend to fix bugs introduced during the app merge. The update also brings advanced Computer Use capabilities, allowing the models to self-drive your cursor to open apps and click buttons.
The merged app introduces 3 new models and an Ultra mode that fundamentally changes how you allocate your usage limits.
What’s the evidence behind GPT-5.6?
Hands-on reviews from Ben’s Bites confirm specific performance patterns for the Luna, Terra, and Sol models. The coverage highlights operational bottlenecks and usage limit drains that founders need to monitor.
Sol at Max thinking produces good writing and excels at UI tasks when provided with references, while Luna operates effectively at xhigh for day-to-day productivity but struggles with ambiguous prompts. Terra feels like a replacement for 5.5 with minor improvements in UI and writing skills, and OpenAI temporarily removed the 5-hour usage limit during the launch phase. The reviewer noted the new ChatGPT Sites plugin login feature was annoying and was turned off. The reviewer also reported being nearly out of usage for the first time after testing Ultra mode.
Ben’s Bites confirms Sol medium is the optimal default, while Ultra mode can drain your weekly limits in a single session.
How does GPT-5.6 compare to the alternatives, and what background do founders need?
GPT-5.6 competes against new multimodal coding models like Muse Spark 1.1, which offers a 1M token context window and a relatively cheaper price point. The market is shifting toward models that can handle agent tasks, computer use, and coding within a single interface.
Anthropic extended Fable 5 on paid plans and Claude Code’s 50% higher weekly limits through July 19, while Meta is starting to offer its models in the API. OpenAI’s approach with GPT-5.6 focuses on merging coding and non-coding workflows into one app, but the faster usage drain at higher thinking levels creates an unpredictable cost variable. This creates a clear distinction, as competitors are offering higher limits while OpenAI’s new Ultra mode can exhaust your weekly capacity in one go.
Competitors are extending usage limits, while GPT-5.6 introduces an Ultra mode that can unexpectedly exhaust your weekly capacity.
How does GPT-5.6 affect day-to-day operations for small businesses?
The new ChatGPT Sites plugin allows teams to quickly build hosted websites, but the faster usage drain at higher thinking levels could unexpectedly increase software costs. Founders need to establish strict internal protocols for which thinking levels are permitted.
The Computer Use feature in the Codex app is really good at self-driving your cursor to open apps and click buttons, which can automate repetitive tasks if tested with Sol medium or high. OpenAI reset usage 4 to 5 times to fix bugs introduced during the app merge, causing downtime that could disrupt your operations. You can track more AI coding tool cost analyses as the model market shifts.
Founders must restrict their teams to Sol medium and Luna xhigh to prevent Ultra mode from draining weekly usage limits.
The sharp chemical smell of curing ink fills the print shop as the bulk order presses run hot, pushing out a massive 5,000-sheet job. You brought in a heavy-duty auto-feeder to handle the volume, expecting it to speed up the line, but the machine aggressively overrides its own thermal limits to perfectly calibrate every single pass. It burns through an entire $400 barrel of premium ink in 1 run, exhausting your weekly supply budget before lunch on Monday. You have to shut down the production line for 3 days while you wait for the next supplier delivery, leaving your commercial clients waiting. This is exactly what happens when your team defaults to GPT-5.6 Ultra mode, as those subagents eat up your usage limits much faster and can exhaust your weekly capacity in a single session.
What’s the final verdict on GPT-5.6?
GPT-5.6 delivers 3 capable models and advanced Computer Use features that can automate cursor movements and build hosted websites. The merger of the macOS and Codex apps creates a unified environment for coding and non-coding work.
The new thinking levels and Ultra mode provide significant power, but they come with the documented risk of exhausting your weekly limits in 1 go, which the reviewer warned about after nearly running out of usage on the first Ultra session. OpenAI reset usage 4 to 5 times during the launch, indicating instability that founders can’t afford in production environments. You need to default to Sol medium for building and Luna xhigh for day-to-day productivity to keep your operations running without burning through your software budget.
GPT-5.6 is a powerful operational upgrade, but Ultra mode is a billing trap that will drain your weekly limits if left unchecked.
Source: Ben’s Bites
