Claude's Nov 30 Cutoffs: Opus 4.8 Fast and Sonnet 4.5
Fast mode on Opus 4.8 and the Sonnet 4.5 model both start returning errors on November 30. What breaks, how to find it in your code and settings, and what Opus 5.5 fast mode costs instead.
AI coding agents, compared like a developer would.
Daily, sourced write-ups on Claude Code, Codex, Copilot, Cursor, Devin, MCP, and the models behind them: what shipped, what broke, and what it costs you.
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New posts on coding agents, their models, and the infrastructure around them.
Backdoored Claude Code Extension in Cursor: What to Do
Cursor's marketplace served a tampered Claude Code extension for 11 hours that planted an SSH key and a startup script. How to check your machine, clean it up, and set an install cooldown.
EMBRACE: Browser Bugs in Five AI Coding Tools
The built-in browsers in Cursor, the Copilot app, Claude Desktop, VS Code, and Codex could run code or read any file. Which are fixed, which are still open, and how to protect your machine.
GitHub Universe 2026: What Changes for Copilot Teams
Fusion model routing is GA, code review has Lite, Balanced, and Max price points, automations bill per run, and Enterprise moves to credits. What to set before your team turns them on.
GPT-6.1 Terra for Coding Agents: Price and Fit
OpenAI's new mid-tier model costs half of GPT-6.1 Sol and is already in Codex and Copilot. What a typical agent run costs on it, where it's enough, and where to keep Sol or Opus.
Claude Code 2.1.311: What Teams Need to Change
Ultrathink now raises effort, Bedrock and Vertex installs fetch a model settings file, and ultrareview needs --trust-workspace in CI. What admins should update before rolling out 2.1.311.
AGENTS.md vs CLAUDE.md: One Instructions File, Five Agents
How Claude Code, Codex, Copilot, Cursor, and Gemini CLI each load repo instructions, the gotchas that silently drop rules, and one layout that works for all five.
Overnight Agent Runs: Lessons From Google's Argon Test
Google left Gemini 4 Argon alone with a 205k-line Python repo for 11 hours. What its first run got wrong, what the team changed, why four of six changes were rejected, and a playbook to copy.
Head-to-head comparisons
Pick the layer you're deciding on.
- Cursor vs GitHub Copilot vs Windsurf in 2026: Which AI Code Editor Fits Your Team?
A practical three-way comparison of the editor agents developers actually evaluate now: context quality, pricing predictability, GitHub integration, and review burden.
- Cursor vs GitHub Copilot in 2026: An Honest Comparison
After Copilot's billing change and Cursor's VS Code dominance, which AI code editor wins for real development workflows? Context quality, pricing, and ecosystem lock-in compared.
- Amazon Q Developer vs JetBrains AI in 2026: Enterprise IDE Integration Compared
For AWS-heavy teams and JetBrains shops, these are the tools Cursor vs Copilot debates miss. An honest comparison of ecosystem fit, security scanning, pricing, and where each breaks down.
What We Cover
Browse posts by the kind of tool.
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Editor Agents
Cursor, GitHub Copilot, Windsurf, JetBrains AI, Zed, and Replit: the AI built into the editor you write code in all day.
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CLI Agents
Claude Code, Codex CLI, Aider, Continue, and Cline: agents that run multi-step changes from your terminal, with your tests in the loop.
⚙
Autonomous Agents
Devin, OpenHands, and SWE-agent: tools that take a ticket and come back with a pull request for you to review.
🔓
Models and protocols
Claude, GPT, Gemini, Llama, Mistral, and Hermes, plus MCP, A2A, and the frameworks that connect agents to tools.