PH PROMPTHACKER.AI
Issue 133

ChatGPT desktop, Sonnet 5, and Gemini Spark: what to test now

A practical workflow-testing issue for Executives: run one ChatGPT desktop workflow, add Claude review rules, and pilot Gemini Spark on one Mac task.

6 min read
Quick Scan

What matters today

ChatGPT desktop, Sonnet 5, and Gemini Spark all matter this week. Here is what Executives should test first.

Format Weekly newsletter issue
Audience Executives using AI at work
Time 6 min read

Key points

  • Grok 4.5 is now publicly available.: xAI says Grok 4.5 is live in Grok Build, Cursor on all plans, and the SpaceXAI console, with API pricing at $2 per million input tokens and $6 per million output tokens.
  • Claude Sonnet 5 becomes the daily default.: Anthropic says Sonnet 5 is available across all plans and is the default for Free and Pro users, with introductory API pricing through August 31, 2026.
  • Gemini 3.5 Flash adds computer use and action.: Google's developer changelog says Gemini 3.5 Flash has public-preview Computer Use support for browser, mobile, and desktop environments.
  • Perplexity adds a legal Computer workspace.: Perplexity's legal page positions Computer for Counsel as a way to connect research databases, documents, contracts, and matter systems into cited work products.
  • xAI is already signaling the next foundation jump.: The user-provided X source points to xAI's next model-training milestone, which is useful as a planning signal but not something to deploy this week.

Welcome

Three updates matter most for Executives right now: OpenAI turned ChatGPT desktop into a work command center, Claude Sonnet 5 becomes the daily default for a broad set of Claude users, and Gemini Spark finally has a practical Mac lane for local files and Workspace tasks.

My read is simple: do not connect every system because a desktop agent shipped. Run one measured test. Use ChatGPT desktop on one recurring business workflow, Sonnet 5 on a messy daily work task, and Gemini Spark on one Google Workspace workflow. Keep the one that saves time after review.

01 / Quick Hits

Free subscriber access

Keep reading with your free PromptHacker subscription.

Enter the email on your PromptHacker subscription. If access is available, a secure link will arrive in that inbox.

New to PromptHacker? Join the free weekly briefing first.

About the author

Pierre Bradshaw Founder, PromptHacker.ai

Pierre has spent 25+ years building growth systems across fintech, real estate, lending, campaigns, and AI workflows, with $1.5B+ in client value delivered.

Email us
Free weekly briefing

Three deep dives. Four useful moves. One email worth opening.

PromptHacker turns the AI firehose into practical next steps for work, health, family, and everything time keeps trying to steal.