Anthropic

Claude Opus 5

Generally Available

Anthropic's recommended everyday default across the Claude API, Claude Code and claude.ai, released July 24, 2026 to succeed Opus 4.8. Anthropic says it approaches the frontier intelligence of Claude Fable 5 at half the cost, with gains over Opus 4.8 on agentic coding, computer use, knowledge work and complex reasoning.

Latest update Jul 25, 2026

01

Current status

Generally available with a 1M-token context window and a selectable effort level (low, medium, high); it replaces Opus 4.8 at the same price.

02

Specifications2

Context Window
1M tokens (128K max output)
Pricing
$5 / input MTok, $25 / output MTok

03

In the news4

  1. Anthropic expands Cyber Verification into three access tiers

    On Oct. 6, 2026 Anthropic said it merged Project Glasswing and its original Cyber Verification Program into a three-tier CVP that gives vetted defenders reduced cyber blocks on Claude Opus 5.5, Sonnet 5.5, Mythos 5.1 and later models. Defense Access covers incident response and malware analysis; Red Team Access adds authorized penetration testing for organizations; Specialized Access, reviewed with the US government, is for testing safety-critical systems such as power grids and flight software. Anthropic said Glasswing partners found at least 129,000 verified vulnerabilities from April to July 2026, plus 5,500 from Anthropic open-source scans, with more than 33,000 rated critical or high.

    www.anthropic.com www.anthropic.com www.anthropic.com srnnews.com

  2. Anthropic ships Claude Opus 5.5 at Fable-level prices

    Anthropic released Claude Opus 5.5 on September 22, 2026, the first model in its Claude 5.5 family. The company says it matches Claude Fable 5.1 on most work, costs 40% less than Opus 5 on typical workloads, and is priced at $4 per million input tokens and $20 per million output tokens. It is generally available on the Claude API, Amazon Bedrock, Google Cloud and Microsoft Foundry, with Fable-class biology and cybersecurity safeguards; Sonnet 5.5 and Haiku 5.5 are due in the coming weeks.

    www.anthropic.com techcrunch.com

  3. ChatGPT, Claude and Gemini hit by simultaneous outages

    OpenAI, Anthropic and Google all reported elevated error rates across their flagship AI products on September 3, 2026. OpenAI detected issues across ChatGPT and Codex at about 10:58 UTC affecting 15 and 4 components respectively, with mitigations applied within about 24 minutes, while Anthropic reported elevated errors on Claude Mythos 5.1, Claude Fable 5.1 and Claude Opus 5 across Claude AI, the API, Claude Code and Claude Cowork, with impact ending by 16:16 UTC. Users also reported errors and failed generations on Google's Gemini during the same window.

    Anthropic Status Tech Startups + OpenAI+ Google DeepMind

  4. Anthropic launches Claude Opus 5 at half its flagship's price

    Anthropic released Claude Opus 5 on July 24, a model it says approaches the frontier intelligence of its top-tier Claude Fable 5 at half the cost, priced at $5 per million input tokens and $25 per million output tokens, the same price as the Opus 4.8 model it replaces. The company positioned Opus 5 as the default everyday choice for agentic coding, knowledge work, computer use and complex reasoning, where it scores higher than Opus 4.8, and added a control that lets users dial the model's effort between low, medium and high. Fable 5 remains Anthropic's most capable public model, with a restricted Mythos 5 tier sitting above both.

    TechCrunch Fortune

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