Type: AI model or model family
Concepts: LLM Evals Code Agents Agents Open Source LLMs Mentioned alongside: Anthropic OpenAI Apache Software Foundation Claude Fable 5 Fable 5.1 Recent briefs: 2026-10-26 2026-10-25 2026-10-18 2026-10-16
Recent Updates
- 2026-09-28: Anthropic Introduces Claude Sonnet 5.5 with Coding and Speed Improvements (breakingnewsofficial) · anthropic.com — Code Agents LLM Evals Tool Use Anthropic · Cursor · Claude Sonnet 5.5 · Claude Sonnet 5 · Claude Opus 5.5 · Claude Haiku 5.5
- 2026-09-29: Witness Benchmark Evaluates Language Model Rule Discovery in Interactive Grid Puzzles (breakingnewsofficial) · arxiv.org — Agents LLM Evals
- 2026-09-29: Livenerf: Continuous Benchmark Tracking Post-Launch Degradation in Claude Opus 5.5 (breakingnewsofficial) · github.com — LLM Evals Code Agents Anthropic · UK AI Security Institute · Opus 5.5
- 2026-09-30: Stanford Introduces HomeBody: Robotics Skill Execution via LLM Tool Calling (breakingnewsofficial) · qbitai.com — Agents Tool Use Agent Memory Stanford · Unitree · Anthropic · OpenAI henry · GPT-6 Astra · Claude MolmoAct · GPT-6 Sol · GPT-5.6 Sol · Opus 5.5
- 2026-10-03: Getting the Most out of Opus 5.5 in Claude and Claude Code (breakingnewsofficial) · claude.dev — Code Agents Hacker News · Opus 5.5
- 2026-10-07: Claude Haiku 5.5 Released with Adjustable Effort and Reduced Pricing (breakingnewsofficial) · anthropic.com — Agents LLM Evals Hacker News · AWS · Google Cloud · Microsoft Azure · Claude Haiku 5.5 · Opus 5.5 · Sonnet 5.5 · Haiku 4.5 · Claude Sonnet 5.5 · Sonnet 5
- 2026-10-16: How to Train Your Little Dragon: Teaching a Small Language Model to Construct and Refine GPU Optimization Scripts (breakingnewsofficial) · arxiv.org — Code Agents LLM Evals OpenAI · Anthropic · Moonshot AI · Zhipu AI · Apache Software Foundation · GPT-6 Astra · Kimi K3 · GLM-5.3 LITTLE DRAGON
- 2026-10-18: KillSwitch: An Esoteric Programming Language Designed to Confound LLMs and Coding Agents (breakingnewsofficial) · blog.picheta.me — LLM Evals Code Agents GitHub · Opus 5.5 · Fable 5.1 · Gemini 4 Argon · MiMo-V2.6 Pro
- 2026-10-25: GVS5H Harness: Zero-Shot Multi-Agent Self-Orchestration Matches Frontier Coding at Lower Cost (breakingnewsofficial) · github.com — Agents Open Source LLMs Code Agents LLM Evals OpenAI · Anthropic · OpenRouter · Qwen3.8-27B · Claude Fable 5 · Qwen3.8-Flash-Next · GPT-5.6 Terra
FAQ
What is Opus 5?
Opus 5 appears in the radar stream as a model or model family. This page is a living index of dated mentions and sources — open Recent Updates and Backlinks for context, not a full product brief.
What does this page track?
Dated radar mentions, source links, related concepts, and builder-relevant context for Opus 5, collected automatically by GROUNDING.
When was Opus 5 last mentioned?
Opus 5 was most recently mentioned in a radar update dated 2026-10-25.
Category: Text / Language Models