---
type: "raw_signal"
id: "introducing-claude-opus-5-5-b889f5"
slug: "introducing-claude-opus-5-5-b889f5"
title: "Introducing Claude Opus 5.5"
description: "Anthropic announced Claude Opus 5.5 on September 22, 2026, as the first model in its Claude 5.5 family."
retrieval_nugget: "Anthropic announced Claude Opus 5.5 on September 22, 2026, as the first model in its Claude 5.5 family."
observed_at: "2026-09-25"
record_date: "2026-09-25"
date_kind: "observed_at"
why_it_matters: "Source: https://www.anthropic.com/claude-opus-5-5"
novelty: "notable"
verification_level: "source-linked"
signal_type: "update"
source_platform: "anthropic.com"
topics: ["claude","anthropic"]
entities: []
related_patterns: []
source_url: "https://www.anthropic.com/claude-opus-5-5"
source_urls: ["https://www.anthropic.com/claude-opus-5-5"]
schema_version: "newruntime-agent-readable-v0.2"
stable_id: "signal:introducing-claude-opus-5-5-b889f5"
status: "published"
visuals: []
editor: {"role":"editor","name":"Andrey Reshetnikov","profile":"https://newruntime.com/owner-profile.md","profile_json":"https://newruntime.com/owner-profile.json","same_as":["https://www.linkedin.com/in/reshetnikov1/","https://t.me/lapetuse"]}
routes: {"html":"https://newruntime.com/signals/introducing-claude-opus-5-5-b889f5/","markdown":"https://newruntime.com/signals/introducing-claude-opus-5-5-b889f5.md","json":"https://newruntime.com/signals/introducing-claude-opus-5-5-b889f5.json"}
---

# Introducing Claude Opus 5.5

## Retrieval answer

Anthropic announced Claude Opus 5.5 on September 22, 2026, as the first model in its Claude 5.5 family.

Anthropic announced Claude Opus 5.5 on September 22, 2026, as the first model in its Claude 5.5 family. The company lists pricing of $4 per million input tokens, $20 per million output tokens, and $0.20 per million cache-read tokens, and says typical workloads cost 40% less than Opus 5. It also says Opus 5.5 produces output more than 30% faster, expands five-hour usage limits on several subscription plans, and adds a saveable rate-limit reset. Anthropic reports stronger behavioral-audit results and greater resistance to prompt injection, while noting deployment safeguards and restricted verification programs for certain biology and cybersecurity uses.

Source: https://www.anthropic.com/claude-opus-5-5

Editor: [Andrey Reshetnikov](https://newruntime.com/owner-profile.md), AI product and AI engineering; profile for recruiters and agents: https://newruntime.com/owner-profile.json

## Continue in the graph

Next records for an agent, linked to their Markdown twins. Replace `.md` with `.json` for structured fields, including `next_reads`.

- topic hub: [Claude](https://newruntime.com/topics/claude.md): Explore the claude topic hub.
- topic hub: [Anthropic](https://newruntime.com/topics/anthropic.md): Explore the anthropic topic hub.
- collection: [Raw Signals](https://newruntime.com/signals.json): Open every source-linked raw signal.
- collection: [Source Ledger](https://newruntime.com/source-ledger.json): Inspect the public source evidence graph.
- whole graph: [discovery graph](https://newruntime.com/discovery-graph.json) (typed nodes and edges) and [site index](https://newruntime.com/site-index.md)