Urgent.News

What's breaking now, across thousands of outlets.

Saturday, 7 November 2026 Reading Room

Tech

Claude Haiku 5.5 400 Error? 5 Fixes That Work (2026)

Claude Haiku 5.5 400 Error? 5 Fixes That Work (2026) Last updated: October 31, 2026 Short answer: Changing only the model ID to Claude Haiku 5.5 can turn a working integration red, because requests that worked yesterday now return 400 Bad Request. The breaks are documented and each has a fix, and this guide covers the five changes that throw a 400, the three that fail silently, and the pricing…

dev.to ·

Claude Haiku 5.5 throws 400 errors when model ID changes from Haiku 4.5, breaking integrated requests. Anthropic's migration guide documents fixes in five categories: budget budgeting, parameter removals, message formatting, toolset updates, and history editing. To fix breakdowns, update model ID, switch thinking to adaptive or disabled, drop temperature/top_p/top_k, use tools instead of computer tool, and avoid editing history.

Anthropic's October 2026 pricing confirms the $0.10/1M input token tier for Haiku 5.5, up from Haiku 4.5's $0.10.

Written by urgent.news from Dev.to's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.

Read the original at dev.to →

More in Tech

The first hour after a token launch: a Telegram lockdown checklist

The first hour after a launch is when a Telegram group is most exposed: new members flood in, nobody knows who the real admins are yet, and scammers know it. This is the checklist I'd run, in order.

  • Pin real contract address in pinned message, restrict DMs to admins
  • Set captcha, block links/media for new members during launch
  • Assign monitor for new joins, watch for usernames resembling admins

·dev.to

The 2017 S3 Outage Was One Wrong Input. AWS Fixed the Tool, Not the Engineer

Book: System Design Pocket Guide: Fundamentals Also by me: Thinking in Go (2-book series) — Complete Guide to Go Programming + Hexagonal Architecture in Go My project: Hermes IDE | GitHub — an IDE for…

  • S3 team executed command with incorrect input, removing more servers than intended
  • Incident caused four-hour outage from 9:37 AM to 1:54 PM Pacific
  • AWS fixed the tool, not the engineer, implementing safety changes to prevent recurrence

·dev.to

Codex Usage Limit: Real Cap or the 40,000-Account Bug?

Codex Usage Limit: Real Cap or the 40,000-Account Bug? Last updated: November 3, 2026 Short answer: On October 20, 2026, OpenAI publicly confirmed that a bug applied the wrong usage limits to…

  • Bug caused 40,000 Codex accounts to misuse usage limits.
  • OpenAI fixed bug and added credits to affected accounts.
  • Codex usage varies based on model, task complexity, context size.

·dev.to

More from Saturday 7 November →