Users say Claude Opus 5.5 got worse; others dispute a decline
Commenters describe context rot and fast quota burn, while a cited daily benchmark is said not to show a drop.
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16 stories, newest first · one card per story
Stories tagged #opus
Anthropic engineers describe shipping Claude with Claude
Opus 5.5 is described as cheaper to run than its predecessor, with thinking blocks kept across turns to hinder distillation.
Anthropic engineers describe Claude Platform, Opus 5.5, and agent isolation
The episode covers managed-agent sandboxes, credential controls, API scaling, and safety routing rather than a new model drop.
Jack Clark moves self-improving AI forecast forward to 2027
TasteVal gives Anthropic's Opus 5.5 a 2.3 compute multiplier, but it does not show models already improving themselves.
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Anthropic previews Claude Duet, a proactive agent on Opus 5.5
The US research preview is waitlisted for Pro and Max, not Team or Enterprise, and shares plan usage limits.
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Show HN: Opus 5.5 made a fully featured Figma clone in 3 hours / 8 prompts
Mana demo says Claude Opus 5.5 built a collaborative Figma-like editor in eight prompts.
Fable Took My Job
An engineer says frontier models like Fable helped leadership eliminate his role without matching his judgment.
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Anthropic Bans Cruelty to Claude, Still Won't Say What It Protects
Anthropic will ban sustained, purposeless cruelty toward Claude from November 12, 2026, by ending chats.
Can AI Agents Learn Their Way to the Top? Evaluating Heuristic Learning in a Long-Running Game Agent Competition
Claude Opus 5.5 with Claude Code won six of twelve AAArena adversarial game ladders.
RobotWorld: Benchmarking Multimodal Agents for Robot Use Across Diverse Tasks and Embodiments
RobotWorld shows multimodal agents still fail to reliably complete diverse robot tasks.
Anthropic's Claude Sonnet 5.5 nearly matches Opus 5.5 on benchmarks while costing up to 30 percent less per task
Anthropic released Claude Sonnet 5.5, nearly matching Opus 5.5 while costing up to 30% less per task.
Bluesky reply bot checker
Simon Willison released a Bluesky checker that flags likely automated reply bots.
Meta’s Muse just stole the AI spotlight from OpenAI and Anthropic
Equity podcast covers Meta's Muse agent, Anthropic Opus 5.5, OpenAI GPT-6, and fresh AI funding deals.
Will Meta’s AI Tamagotchi bet is…working?
Meta's personal AI agent Muse is reportedly outpacing ChatGPT's early growth as OpenAI and Anthropic ship new models.
Using LLMs to trace alchemical knowledge and decode 17th century letters
A historian says frontier models traced alchemical sources and broke an unsolved 1941 cipher.
Anthropic engineer explains why Claude's writing got worse although the model got smarter
An Anthropic engineer says newer Claude models write worse because training optimized for code and other AIs.