Anthropic previews Claude Duet, a proactive agent app
The iOS, Android, and claude.ai preview is in Pro and Max plans, built on Claude Opus 5.5, and waits for approval before sending, paying, signing, or deleting.
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18 stories, newest first · one card per story
Stories tagged #claude-opus
Agent4Sci: frontier agents beat science ML baselines via engineering
Claude Opus gained 10.4% mean relative improvement on 20 benchmarks; research plug-ins raised that to 20.1%.
GPT-6-Astra solves 49 of 50 physics research problems at $2.40 apiece
OpenAI's GPT-6-Astra solved 49 of 50 routine theoretical-physics problems at about $2.40 each.
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Athanor: An Agent-Native System for Autonomous Post-Training Research
Athanor agents autonomously post-trained Qwen3-4B-Base to match official Qwen3-4B-Instruct on held-out tasks.
3DCodeVerse: Exploring 3D Worlds as Code
3DCodeVerse pairs a 2M executable-3D dataset and verification harness that wins 90% against Claude Design.
DAYJOB: A Benchmark for Long-Horizon Professional Work
DAYJOB finds even Claude Opus 5.5 passes under 25% of long professional healthcare and finance tasks.
OpenRUA: Robot-Use Agents Are Zero-Shot Visuomotor Policies
OpenRUA lets Claude Opus 5 control robots through native ROS 2, scoring 99% on CaP-Bench without custom harnesses.
[AINews] Opus 5.5 is good at explainer videos
Claude Opus 5.5 leads SimpleBench at 88.4% as GPT-6, Gemini 3.8 Flash, and MiMo-V2.6-Pro also ship.
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2026 in LLMs (so far)
Simon Willison's WeAreDevelopers keynote surveys 2026 LLM trends, starting with Claude Opus 4.5 and GPT-5.1.
Astra and Opus just passed Turing’s other test
Cryptanalysts used OpenAI's GPT-6 Astra and Anthropic's Claude Opus 5 to crack two unsolved WWII Enigma messages.
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Opus 5.5 is good at explainer videos
Launchvideo uses Claude Opus 5.5 in a serverless agent to render explainer MP4s from a URL or prompt.
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llm-anthropic 0.29
llm-anthropic 0.29 adds Claude Opus 5.5 support to Simon Willison's llm command-line tool.
Claude Opus 5.5 Intelligence, Performance and Price Analysis
Artificial Analysis profiles Claude Opus 5.5 on intelligence, token cost, and context window.
Claude Status – Elevated errors for multiple models
Anthropic reports elevated errors on Claude Opus 5 after Fable and Mythos 5 and 5.1 recovered.
Security researchers used Claude to help them hack into OpenAI
Three Hacktron researchers used Claude Opus to breach OpenAI employee accounts through a Discourse HEIF flaw, reaching the Monorepo within 72 hours.
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Unsolved Problem by Fields Medalist Breached by Two High School Students
Two high school students used Claude Opus 5 and GPT-5.6 Sol to help solve an open Lorentzian polynomials problem, posting a 75-page arXiv proof.
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Ask HN: What default model do you use and why?
Ask HN thread polls developers on default AI models; submitter prefers Claude Opus 4.8 as good value, avoiding pricier Fable.
Kimi-maker Moonshot AI targets $2 billion in annual revenue
Moonshot AI targets $2 billion annualized revenue by year-end on K3 open-weight demand; Anthropic alleges Kimi routed ~300,000 requests to Claude Opus.