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OPUS — Claude Opus 4.7 is generally available, improving software engineering, long-running coding, and higher-resolution visionAPIKEY — You can now set an expiration on API keys in the Console, with email reminders before keys valid for 7+ days expireREFLECT — A monthly recap at Settings > Reflect shows your top topics, most active day, and peak hour (beta)M365 — The Microsoft 365 connector now supports write tools for email, calendar, and OneDrive/SharePoint filesCOWORK — Cowork expands to web and mobile, bringing Chat and Cowork into one shared home across devicesDESIGN — Claude Design, a new Anthropic Labs product, lets you co-create designs, prototypes, slides, and one-pagersOPUS — Claude Opus 4.7 is generally available, improving software engineering, long-running coding, and higher-resolution visionAPIKEY — You can now set an expiration on API keys in the Console, with email reminders before keys valid for 7+ days expireREFLECT — A monthly recap at Settings > Reflect shows your top topics, most active day, and peak hour (beta)M365 — The Microsoft 365 connector now supports write tools for email, calendar, and OneDrive/SharePoint filesCOWORK — Cowork expands to web and mobile, bringing Chat and Cowork into one shared home across devicesDESIGN — Claude Design, a new Anthropic Labs product, lets you co-create designs, prototypes, slides, and one-pagers
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API & SDK/2026-07-12Advanced

Designing Around Claude API 413 request too large — Preflight Sizing and Splitting

Pack too much text, images, and tool_result into one request and Claude API rejects it with 413 request too large. Here is a code-backed design for measuring request bytes before you send, telling the two kinds of 413 apart, and splitting requests without breaking them.