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Claude Code 2.1.281: MCP URL elicitation and plugin validate checks

Claude Code 2.1.281 adds MCP URL-mode elicitation on 2026-07-28 connections so servers can open a browser-based flow without leaving a stuck waiting dialog. claude plugin validate now flags silently dropped .mcp.json entries, undeclared ${user_config.*} refs, and insecure URLs.

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Devin adds GPT-6 Sol and Luna for cheaper coding runs

Cognition put OpenAI’s GPT 6 Sol and Luna live in Devin Desktop and CLI. On FrontierCode 1.1, Sol matches GPT 5.6 Sol at 61% lower cost per task and sits within four points of Astra at under half the cost; Luna is the cheapest model on the board at under $0.10 per task…

Cognition

Claude Opus 5.5 lands in GitHub Copilot for agentic coding

Claude Opus 5.5 is rolling out in GitHub Copilot for Pro+, Max, Business, and Enterprise across VS Code, JetBrains, Copilot CLI, the coding agent, and more. Early tests matched Opus 5 on task resolution with fewer steps and tokens; Enterprise/Business admins can gate it via model policy…

GitHub Changelog

Xiaomi open-sources MiMo-V2.6 with 7k+ agent RL environments

Xiaomi released MiMo V2.6 Pro and Flash as open weights (MIT) plus a Distill Qwen 9B research model, claiming Pro leads open models on Artificial Analysis at 46 while still trailing Claude Fable 5.1 and GPT 6 Astra. The drop also includes 7,000+ RL task environments, an end to end RL framework, and mini harnesses for multi harness agent training…

Xiaomi MiMo

Anthropic: ~950 Claude agents found a novel phage enzyme system

Anthropic says nearly 950 Claude agents spent 21 hours and 210 million tokens scanning DNA data before flagging a previously uncharacterized bacteriophage enzyme system for human review. The company compares the find to CRISPR machinery but says practical uses are still unclear; it’s the first result from its new wet lab…

The Verge

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