Copilot, Codex, and MAI model updates #37

June 4, 2026 — 2 min read

Today's Letter

GitHub expanded the Copilot app technical preview on June 2, 2026.
Access now covers existing Copilot Pro, Pro+, Business, and Enterprise customers.
The desktop app is available for Windows, macOS, and Linux.
New Canvases let agents update visible work surfaces while users edit, reorder, and approve changes.
The app supports parallel agent sessions with isolated git worktrees, branches, files, and task state.
Users can review plans and diffs, then validate behavior in the integrated terminal and browser.
New additions include on-device voice conversations, cloud sessions, cloud automations, and agentic browsing.

Source: github.blog
More: github.com

Microsoft introduced MAI-Code-1-Flash at its Build 2026 developer conference as its first in-house coding model for generating application and website code from text prompts.
The company also announced MAI-Thinking-1, a medium-sized reasoning model positioned around lower token cost and higher efficiency for developer workloads.
MAI-Code-1-Flash is available through GitHub Copilot and the Visual Studio Code editor, according to Microsoft's launch materials cited by CNBC.
MAI-Thinking-1 is available in private preview through Microsoft Foundry, and customers can register interest ahead of broader availability.
Microsoft said customers can improve MAI-Thinking-1 accuracy by incorporating their own data into application workflows.
The launch expands Microsoft's role in the AI stack beyond cloud hosting and model distribution for partners such as OpenAI and Anthropic.
CNBC reported that Microsoft is also updating cloud models for speech recognition, synthetic voice generation, and image generation, alongside small Aion models for Windows PCs.
Microsoft AI CEO Mustafa Suleyman said a refined internal model setup for McKinsey outperformed GPT 5-5 with 10 times better cost efficiency, though benchmark details were not included in the cited report.

Source: cnbc.com
More: news.hada.io · blogs.microsoft.com · news.microsoft.com

OpenAI introduced role-specific Codex plugins, in-place annotations, and a Sites preview on June 2, 2026.
OpenAI said Codex now has more than 5 million weekly users.
Non-developers account for about 20% of Codex users and are growing more than 3x faster than developers.
The launch includes six role-specific plugins covering 62 apps and 110 skills.
OpenAI highlighted plugins for data analytics, creative production, sales, product design, public equity investing, and investment banking.
Plugins can be used out of the box, adapted to team workflows, or extended with custom internal integrations.
Sites lets Codex create and share hosted interactive websites and apps by URL in preview for business and enterprise customers.
OpenAI said it is building toward a broader plugin ecosystem across Codex and ChatGPT.

Source: openai.com
More: blog.calif.io · news.hada.io · cybersecuritynews.com

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