OpenAI said on March 6, 2026 that Codex Security is entering research preview for ChatGPT Pro, Enterprise, Business, and Edu users in Codex web. The company says the application-security agent uses project-specific threat models, contextual validation, and patch proposals, and in beta scanned more than 1.2 million commits.
Google says Gemini CLI now includes a read-only Plan mode that analyzes requests, codebases, and dependencies before any edits happen. The update also adds an ask_user tool and read-only MCP access so teams can clarify requirements and pull in outside context without risking accidental changes.
OpenAIDevs said on March 16, 2026 that subagents are now available in Codex. The feature lets developers keep the main context clean, split work across specialized agents, and steer individual threads as they run, while the official docs already describe PR review and CSV batch fan-out patterns.
GitHub used X on March 15, 2026 to spotlight the Copilot CLI `/fleet` command for routine maintenance work. GitHub’s official Copilot CLI materials now describe `/fleet` as a parallel sub-agent workflow that converges multiple runs into one decision-ready result.
OpenAIDevs said Codex now supports a /fast mode where GPT-5.4 runs 1.5x faster while keeping the same intelligence and reasoning profile. The update targets faster coding iteration and debugging loops for developer workflows.
A high-engagement r/LocalLLaMA thread reports strong early results for Qwen3.5-35B-A3B in local agentic coding workflows. The original poster cites 100+ tokens/sec on a single RTX 3090 setup, while comments show mixed reproducibility and emphasize tooling, quantization, and prompt pipeline differences.