●AUTO — Auto mode becomes the default in Claude Code tomorrow, August 14, across the Pro, Max, and Team plans●SUNSET — The legacy Workbench and the experimental prompt tool APIs retire on August 17, now four days away●COWORK — Cowork has expanded to mobile and web, so sessions and files follow you between devices, with background runs, scheduled tasks, and approvals from your phone●DESIGN — Claude Design is here: build branded decks, landing pages, and prototypes in one conversation, then export to PDF, PPTX, Canva, or HTML●AUDIT — The Compliance API now covers Cowork and Claude Code across desktop, web, mobile, and CLI, in beta for Enterprise customers●PRICE — Sonnet 5 promo pricing at $2/$10 per Mtok runs through August 31, moving to $3/$15 on September 1●AUTO — Auto mode becomes the default in Claude Code tomorrow, August 14, across the Pro, Max, and Team plans●SUNSET — The legacy Workbench and the experimental prompt tool APIs retire on August 17, now four days away●COWORK — Cowork has expanded to mobile and web, so sessions and files follow you between devices, with background runs, scheduled tasks, and approvals from your phone●DESIGN — Claude Design is here: build branded decks, landing pages, and prototypes in one conversation, then export to PDF, PPTX, Canva, or HTML●AUDIT — The Compliance API now covers Cowork and Claude Code across desktop, web, mobile, and CLI, in beta for Enterprise customers●PRICE — Sonnet 5 promo pricing at $2/$10 per Mtok runs through August 31, moving to $3/$15 on September 1

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Claude API¹ tool use¹ vision¹ token optimization¹

⬡ API & SDK/2026-06-29Advanced

Let Claude Actually See the Images Your Tools Return — Use Image Blocks in tool_result and Cut Tokens by Roughly 10x

Stuffing a base64 string into a tool_result makes the same image cost roughly 10–20x more tokens. Here is how to return it as an image content block instead, with SDK code, a token-cost estimate, and the gotchas I hit in production.