Prime Intellect open-sources Prime Agent, a self-improving coder
MIT-licensed, one-command install, 95.5% on ARC-AGI-3 — plus Copilot's Sept 1 model purge, Grok Imagine 2.0, and Codex CLI's plugin overhaul.
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One command, and it out-codes the experts
Prime Intellect open-sourced Prime Agent under MIT: a self-improving "continual harness" that spawns sub-agents as async function calls inside a persistent IPython kernel, with tools exposed as code instead of rigid schemas. It scored 95.5% on ARC-AGI-3 — just past the 95.4% human-expert baseline — and wrote working SEGA Genesis and Game Boy Color emulators in Rust from scratch. Installs in one command on Linux or macOS and runs on subscription APIs or local models, but it executes with your user permissions and no sandbox, so give it a disposable box.
Copilot pulls six models on Sept 1
GitHub Copilot will retire six models across every surface on September 1: Gemini 3.1 Pro, Claude Opus 4.5 and 4.6, Claude Sonnet 4.5 and 4.6, and Raptor Mini. Recommended swaps are Gemini 3.6 Flash, Claude Opus 4.7/4.8/5, Claude Sonnet 5, and MAI-Code-1-Flash; Sonnet 4.6 survives only for annual individual subscribers. If any script, extension, or workflow pins these by name, repoint it before the cutoff — enterprise admins may need to enable the alternates in the model picker first.
Grok's Imagine 2.0 edits images like a designer
xAI shipped Imagine Image 2.0 as the new Quality Mode on Grok, and it's ranking #2 globally in both text-to-image and image editing. New tools include magic-wand editing, segmentation, background removal, multi-reference generation from up to five input images, and one-tap resize to any aspect ratio. It's live in the Grok apps now; API access is still "coming soon," so you can use it by hand but not yet wire it into a pipeline.
Codex CLI adds portable plugins and Cursor-skill import
OpenAI's Codex CLI 0.147.0 introduces portable Agent Plugins you can search across local, personal, workspace, and remote catalogs, and it can import Cursor-managed skills with synced updates. A new --approve-for-me flag auto-approves actions for hands-off runs, and it speaks the MCP 2026-07-28 protocol. If you bounce between Cursor and Codex, your skills now follow you across both.