AI·
GitHub ran four frontier models through Copilot's harness. None won every task.
GitHub benchmarked Copilot's agent harness against Claude Code and Codex CLI on five tests. The token savings are real, and the best model depends on the task.
Product
Codex
RSS 11 articles
First covered Apr 17, 2026, latest Jul 6, 2026
AI·
OpenAI is now using GPT-5.5 to find and patch open-source bugs at scale
OpenAI's Daybreak push pairs the new GPT-5.5 default model with GPT-5.5-Cyber, a tool that finds, validates, and patches software flaws. Here's what it does and the catch.
AI·
OpenAI is putting Codex in every ChatGPT app, with six business plugins for non-coders
On June 2 OpenAI said Codex is coming to the ChatGPT app everywhere within weeks, and shipped six role-specific plugins for sales, analytics, design, and finance teams.
AI·
OpenAI's Codex moved into the ChatGPT mobile app. You can approve a diff from the train now.
OpenAI shipped Codex remote control inside the ChatGPT app for iPhone, iPad, and Android on May 14. Pair via QR; the agent runs on your laptop, the review moves to your phone.
Open Source·
Zed 1.0 ships its agentic editor. The Atom team's Rust rewrite finally has a stable label.
Zed Industries shipped 1.0 on April 29 after five years of Rust and GPU work. Free forever for humans, with $10/month hosted AI and an open Agent Client Protocol.
Open Source·
Warp's terminal is now open source. The cloud agent platform Oz is the actual product.
Warp released its 36k-star Rust client on GitHub under AGPLv3 on April 28. OpenAI is the founding sponsor and Oz keeps the bills paid.
AI·
OpenAI's models are on AWS Bedrock the day after Microsoft lost exclusivity
Amazon shipped Bedrock Managed Agents powered by OpenAI on April 28, plus Codex on Bedrock. Altman tells Stratechery the runtime matters as much as the model.
AI·
OpenAI shipped GPT-5.5 seven weeks after 5.4. API tokens now cost twice as much.
OpenAI released GPT-5.5 (codename Spud) on April 23. The API runs at $5/$30 per million tokens, double GPT-5.4, with Pro at $30/$180.
AI·
OpenAI's Workspace Agents kill Custom GPTs and take the fight straight to Claude Code
Workspace Agents for ChatGPT Business, Enterprise, Edu, plus Teachers launched April 22. Team-shared, cloud-run, Codex-powered. Free until May 6, then credit-based.
AI·
Cursor wants $50B for an AI editor that's burning cash on individuals
Cursor is in talks to raise $2B at a $50B valuation, nearly double its September mark. Revenue is up, but it's still losing money per indie seat.
AI·
OpenAI's Codex now drives your Mac, not just your code
OpenAI shipped a Codex update that can pilot desktop apps with a cursor, generate images in-line, and run parallel agents. It's the opening move in a real Claude Code fight.