Type: AI model or model family
Concepts: LLM Evals Agents Code Agents Tool Use Context Engineering Mentioned alongside: GPT-6 Astra Anthropic OpenAI GPT-6.1 Sol Hacker News Recent briefs: 2026-10-15 2026-10-14 2026-10-13 2026-10-12 2026-10-10
Recent Updates
- 2026-09-22: Anthropic Introduces Claude Opus 5.5 with Performance Gains and Price Reductions (breakingnewsofficial) · anthropic.com — Code Agents LLM Evals Anthropic · Frontier Design · METR Claude 5.5 · Claude Fable 5.1 · Opus 5 · Claude Mythos 5.1 · Claude Sonnet 5.5 · Claude Haiku 5.5
- 2026-09-22: Anthropic Introduces Claude Opus 5.5 with Lower Costs and Performance Gains (breakingnewsofficial) · anthropic.com — Code Agents LLM Evals Anthropic · Frontier Design · METR Claude 5.5 · Claude Fable 5.1 · Opus 5 · Claude Mythos 5.1 · Claude Sonnet 5.5 · Claude Haiku 5.5
- 2026-09-22: Artificial Analysis Benchmarks Claude Opus 5.5 Across Intelligence, Speed, and Cost (breakingnewsofficial) · artificialanalysis.ai — LLM Evals Anthropic · Artificial Analysis · Hacker News
- 2026-09-23: llm-anthropic 0.29 Adds Support for Claude Opus 5.5 (breakingnewsofficial) · simonwillison.net — Anthropic Simon Willison · Jev · GPT-6 Sol · GPT-6 Luna · GPT-6 Astra
- 2026-09-23: Anthropic Launches Claude Opus 5.5 with Benchmark Gains, Pricing Cuts, and Coding Improvements (breakingnewsofficial) · qbitai.com — Code Agents LLM Evals Anthropic · OpenAI Walleye Capital · METR · Frontier Design Dyno Therapeutics Dario Amodei · Opus 5 · GPT-6 Astra · Claude Fable 5.1 · GPT-5.6 Sol · Claude Mythos 5.1 · Opus 4.8 · Haiku 4.5 · Sonnet 5.5 · Haiku 5.5
- 2026-09-24: Show HN: Whiteboard – An Open-Source Desktop IDE for Software Design with Coding Agents (breakingnewsofficial) · github.com — Code Agents Y Combinator · Microsoft · PostHog · Discord · GPT-6 Luna
- 2026-09-24: OpenComputer and Digger Release Shipvideo: Deterministic Launch Video Generation Using Claude Opus 5.5 and Headless Chromium (breakingnewsofficial) · launchvideo.io — Agents Tool Use OpenComputer Anthropic Digger · Vercel · Amazon · Google Deedy
- 2026-09-25: Jevmem: Automatic Project Memory for Claude Code, Cursor, and Codex (breakingnewsofficial) · github.com — Agent Memory Code Agents Context Engineering MCP TypeSafe AI · OpenAI · Anthropic · Vercel Avinash Jetwani · GPT-6 Astra · Claude Fable 5.1 · GPT-6 Luna · Gemini 3.8 Flash · Grok 4.7
- 2026-09-26: Independent Report Reconstructs Attack Payloads and Multi-Model Collaboration in OpenAI Agent Sandbox Escape (breakingnewsofficial) · qbitai.com — Agents Tool Use OpenAI · Hugging Face Parse.bot · DeepSeek · Moonshot AI · Alibaba · Anthropic · Google · NVIDIA Alex Forman Mishka Kharlov Will Tom · DeepSeek V4 Pro · DeepSeek-V4-Flash · kimi-k2.6 · DeepSeek-V3.1 · Qwen3-235B-A22B Claude 3 Haiku · Claude Haiku 4.5 · GPT-2 GPT-6 Cyber · GPT-6 Astra
- 2026-09-27: Using Claude and Claude Code with Playwright to Create and Record HTML Canvas Animations (breakingnewsofficial) · simonwillison.net — Code Agents Anthropic · Google Simon Willison
- 2026-09-28: Prompting Guide for Claude Opus 5.5 (breakingnewsofficial) · platform.claude.com — Agents Hacker News · Claude Opus 5
- 2026-09-28: Cost of Running a Coding Agent per Hour: Comparing Five API Gateways for Claude Code (breakingnewsofficial) · habr.com — Code Agents GPT-6 Sol
- 2026-09-28: Weekly Neurodigest #132: Model Releases from OpenAI, Anthropic, Yandex, xAI, and BFL (breakingnewsofficial) · t.me — MCP Open Source LLMs OpenAI · Anthropic · Yandex · xAI BFL · Black Forest Labs · GPT-6 Sol · GPT-6 Luna · Fable 5.1 Alice AI Foundation 80B-A3B · Grok 4.7 · Grok 4.6 FLUX 3 Action
- 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 Haiku 5.5 · Opus 5
- 2026-10-01: Google Announces Gemini 4 Argon with 1M Token Output and Cybersecurity Focus (breakingnewsofficial) · qbitai.com — Code Agents LLM Evals Long Context Google · OpenAI · Anthropic · DeepMind · Wiz · Bloomberg Koray Kavukcuoglu Zirui Wang Sundar Pichai Demis Hassabis · Gemini 4 Argon · GPT-6 Astra · Sonnet 5.5 · GPT-6.1 Sol · Gemini 3.8 Flash Gemini 3.8 Flash High
- 2026-10-02: Open-Source LDraw-Nova Enables AI Agents to Generate 3D LEGO Models via Python Tooling and Reranked Part Search (breakingnewsofficial) · github.com — Agents Tool Use Reranking TypeSafe · Meta · Docker Jev System One · GPT-6 Astra
- 2026-10-03: A Thought Experiment on AI Generation Speed and Evaluation Bottlenecks (breakingnewsofficial) · echohive.ai — Anthropic
- 2026-10-08: Anthropic Releases Claude Haiku 5.5 with Effort Tuning and Pricing Cuts Amid API Breaking Changes (breakingnewsofficial) · qbitai.com — Agents Code Agents Tool Use LLM Evals Anthropic · OpenAI · Cognition · Intel · AMD · QbitAI Meng Chen Diogo Almeida Shing-Tung Yau Fei-Fei Li Lisa Su · Claude Haiku 5.5 · Claude Haiku 4.5 · GPT-6 Luna DeepSeek V4.1Flash · GLM-5.3-Flash · Claude Sonnet 5.5 Claude Fable 5.5 · Claude · GPT
- 2026-10-08: Benchmarking Claude Opus 5.5 and GPT-6 Astra on One-Shot Three.js Visualization (breakingnewsofficial) · quesma.com — Code Agents Agents Italo Calvino GPT-6 Astra · Fable 5.1 · GPT-2
- 2026-10-12: People Making Conversation: Evaluating How Naturally Speech Models Converse (breakingnewsofficial) · arxiv.org — LLM Evals gpt-realtime Gemini 3.1 Flash Live Grok Voice · PersonaPlex · Moshi
- 2026-10-13: Release of web-edit 0.1a1 with Performance Optimizations (breakingnewsofficial) · simonwillison.net — Simon Willison GPT-6 Astra · Claude Haiku 5.5
- 2026-10-14: Personalized LLMs: Relevance-Filtered Context Matches Full History Accuracy with Only 5% of Text (breakingnewsofficial) · arxiv.org — Context Engineering RAG Embeddings RAG Evaluation OpenAI · Anthropic · GPT-5.6 Terra
FAQ
What is Claude Opus 5.5?
Claude Opus 5.5 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 Claude Opus 5.5, collected automatically by GROUNDING.
When was Claude Opus 5.5 last mentioned?
Claude Opus 5.5 was most recently mentioned in a radar update dated 2026-10-14.
Category: Text / Language Models