OpenAI Launches ChatGPT Work and GPT-5.6; Microsoft Stock Flat Over Weekend

OpenAI on Thursday (July 10) dropped a slate of major updates, including the GPT-5.6 model family and a new ChatGPT Work desktop app that integrates the previously standalone Codex coding tool into ChatGPT, creating a "super app" for the office.^{[Business Insider]} The move is seen as a key step for OpenAI to solidify its position in the fiercely competitive AI market and expand its user base. As of the July 10, 2026 close, Microsoft (MSFT) was at $385.1, up 0.19% from the prior close of $384.36. With the market closed for the weekend, that price is the last trade, with no real-time movement.^[Finnhub]

GPT-5.6 Three Models: Performance and Cost

OpenAI's new GPT-5.6 family comes in three tiers: the flagship Sol, the balanced Terra, and the lightweight Luna.^[Forbes] According to Forbes, Sol scored 59 on the Artificial Analysis Intelligence Index, just 0.9 points behind Anthropic's Claude Fable 5, but costs roughly a third less per task. On coding benchmarks, Sol led the Coding Agent Index with a score of 80 and hit 91.9% accuracy on Terminal-Bench 2.1.^[Forbes] On pricing, Sol charges $5/$30 per million input/output tokens, Terra $2.50/$15, and Luna $1/$6, all undercutting Anthropic's comparable models.^[Forbes]

CNET reported that Sol is OpenAI's strongest coding model yet, surpassing Anthropic's Fable 5 on the Artificial Analysis Coding Agent Index.^[CNET] GPT-5.6 also introduces two new reasoning modes: Max, which allocates more compute to complex problems, and Ultra, which coordinates four agents in parallel for demanding workflows.^[Forbes]

ChatGPT Work Integrates Codex, Desktop "Super App"

The centerpiece of the launch is ChatGPT Work, which merges OpenAI's Codex coding tool into the ChatGPT desktop app, creating a unified interface with built-in browser and computer control capabilities.^[Engadget] According to Business Insider, Codex already had 5 million weekly users, and its head, Andrew Ambrosino, called the merger "just the first step," with the team working to unify the experience across web, mobile, and desktop.^{[Business Insider]}

Ars Technica reported that ChatGPT Work can "continuously work on a project for hours when needed" and supports Scheduled Tasks, allowing users to kick off tasks remotely and check progress when they return to their desktop.^{[Ars Technica]} The tool connects to common office apps like Slack, Google Drive, and Microsoft 365, and lets users call specific third-party tools with an "@" symbol.^[Engadget] According to Forbes, internal OpenAI testing showed nearly 100% of internal teams already using ChatGPT Work, with the finance team cutting month-end closing from days to hours.^[Forbes]

OpenAI also announced that its standalone browser, Atlas, will be shut down on August 9.^[Engadget] The existing ChatGPT desktop app will be renamed "ChatGPT Classic," with a "quick chat" button for basic conversations.^{[Ars Technica]}

Government Review Delays Launch, OpenAI Under Pressure

The public rollout of GPT-5.6 was not smooth. According to Engadget, the Trump administration requested an early review over cybersecurity concerns, forcing OpenAI to first offer a "limited preview" to government-approved partners before getting the green light for a full release.^[Engadget] CNET also confirmed that GPT-5.6 was initially only available to cybersecurity and tech professionals, with government officials demanding a phased rollout.^[CNET]

Meanwhile, OpenAI faces fierce competition from rivals including Anthropic, Google, Meta, and SpaceXAI.^{[Business Insider]} Business Insider reported that OpenAI has filed a confidential IPO document, but CEO Sam Altman, when asked if the company would go public this year, said "I don't know."^{[Business Insider]}

Microsoft Stock Flat Over Weekend, Market Waits

As OpenAI's primary investor and partner, Microsoft (MSFT) shares traded steadily on the day of the announcement. As of the July 10, 2026 close, Microsoft was at $385.1, up 0.19% from the prior close of $384.36.^[Finnhub] The stock hit an intraday high of $391.91 and a low of $381.5. With the market closed for the weekend, the stock is frozen at that close, with no real-time movement.

This OpenAI update could have indirect implications for Microsoft's cloud and office software businesses. ChatGPT Work already supports Microsoft 365 and SharePoint,^{[Ars Technica]} but the market has yet to react decisively. Investors will watch Microsoft's stock on the next trading day (Monday, July 13).

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