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Opus 5.5 cuts price but breaks four Claude agent API patterns

Anthropic’s Opus 5.5 is cheaper than Opus 5, but its migration guide flags four breaking changes—always-on thinking, no forced tool_choice, append-only thinking blocks, and a new computer-use toolset—that can return 400s in existing agent loops. Claude Code and Managed Agents already handle it; custom agents need code changes before flipping the model ID.

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Claude Code cloud sessions now generally available

Anthropic moved Claude Code cloud sessions (formerly Claude Code on the web) out of research preview on Sept 23 for Pro, Max, and Team, plus eligible Enterprise seats. Sessions run on Anthropic managed VMs so work continues with the laptop closed, sharing rate limits with other Claude Code usage…

Anthropic

ChatGPT mobile adds voice-driven agentic Work features

OpenAI brought voice based agentic workflows to the ChatGPT mobile app: Plus and Pro can use the Work tab by voice to draft docs or emails and summarize Slack, while Free and Go get plugins and connected apps. Conversations can start on mobile voice and resume on desktop, matching the earlier GPT Live desktop rollout…

TechCrunch

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