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Model

Claude 3 Opus

Claude 3 Opus, announced on 4 March 2024, was the most capable model in the Claude 3 family. It added vision and launched with a 200K-token context window and a Needle In A Haystack recall above 99%.

Status DeprecatedModality Text, ImageContext (K tokens) 200 Era Generative AI for everyone

License
Proprietary
Access
API, App, Enterprise
Release date
Developer
Anthropic

What it is

Claude 3 Opus is the most capable model of the Claude 3 family, which also includes Haiku and Sonnet. Anthropic announced the family on 4 March 2024, with Opus at the top of the range.[1]

In Anthropic's own description, Opus ran at roughly the speed of Claude 2 and Claude 2.1 but with much higher intelligence. It was offered to Claude Pro subscribers in claude.ai and through the API, and was generally available in 159 countries.[1]

Main features

Opus was priced at $15 per million input tokens and $75 per million output tokens.[1] A token is a small piece of text, roughly a word or part of a word, so this price is charged per million tokens sent in and per million tokens generated.

It launched with a 200K-token context window. Anthropic said all three Claude 3 models could accept inputs over 1 million tokens, but this was offered to select customers for specific use cases.[1]

Opus was tested on the Needle In A Haystack evaluation, a long-context test that hides one fact inside a large body of text and asks the model to find it. Recall on that test exceeded 99% accuracy.[1]

The Claude 3 models added vision. They can process photos, charts, graphs and technical diagrams.[1]

Results

On challenging open-ended factual questions, Opus roughly doubled the accuracy of Claude 2.1 while giving fewer incorrect answers.[1]

Anthropic assessed the Claude 3 models as remaining at AI Safety Level 2 (ASL-2) under its Responsible Scaling Policy, the company's framework for matching safeguards to model capability.[1]

Place in the story

Wikipedia's model table gives the training data as running to August 2023.[3]

Anthropic announced the deprecation of claude-3-opus-20240229 on 30 June 2025. The model was retired on 5 January 2026.[2]

A context window is the amount of text a model can take into account at once, including the question and any documents supplied with it. A larger window lets a user work with a whole report or a long codebase in one request, rather than splitting it into pieces.

CapabilitiesLarge language modelsMultimodalComputer visionReasoning

ApplicationsEnterprise

Version history

20
  1. 2023
    • Mar 14, 2023 Claude (March 2023)

      Claude is the AI assistant Anthropic announced on 14 March 2023, its first publicly available assistant. It was built around training AI to be helpful, honest and harmless, and it started the Claude model line.

    • Jul 11, 2023 Claude 2

      Claude 2 is the second major version of Anthropic's assistant model, released on 11 July 2023 with better performance and longer responses. It was the first Claude model open to the general public.

    • Nov 21, 2023 Claude 2.1

      Claude 2.1, released on 21 November 2023, doubled the context window to 200,000 tokens and cut false statements by half compared with Claude 2.0. It added tool use and system prompts.

  2. 2024
    • Mar 4, 2024 Claude 3 Opus · This page

      Claude 3 Opus, announced on 4 March 2024, was the most capable model in the Claude 3 family. It added vision and launched with a 200K-token context window and a Needle In A Haystack recall above 99%.

    • Mar 4, 2024 Claude 3 Sonnet

      Claude 3 Sonnet was the middle model of Anthropic's Claude 3 family, announced on 4 March 2024. It powered the free tier of claude.ai, offered a 200K-token context window, and was retired on 21 July 2025.

    • Jun 20, 2024 Claude 3.5 Sonnet

      Claude 3.5 Sonnet, released on 20 June 2024, was the first model of the Claude 3.5 family. It ran twice as fast as Claude 3 Opus at the mid-tier price and powered the new Artifacts and Projects features.

    • Oct 22, 2024 Claude 3.5 Sonnet (October 2024 upgrade)

      The upgraded Claude 3.5 Sonnet, announced on 22 October 2024, raised coding and agentic scores and introduced computer use in public beta, the first such offer from a frontier AI model.

  3. 2025
    • Feb 24, 2025 Claude 3.7 Sonnet

      Claude 3.7 Sonnet, released on 24 February 2025, was described by Anthropic as the first hybrid reasoning model on the market, able to answer quickly or think step by step at length. It launched with Claude Code.

    • May 22, 2025 Claude 4 (Claude Opus 4 and Claude Sonnet 4)

      Claude Opus 4 and Claude Sonnet 4, announced on 22 May 2025, were hybrid models with extended thinking. Anthropic called Opus 4 the best coding model in the world, and Claude Code became generally available the same day.

    • Aug 5, 2025 Claude Opus 4.1

      Claude Opus 4.1, released on 5 August 2025, upgraded Claude Opus 4 for agentic tasks, real-world coding and reasoning, at the same price. Anthropic later succeeded it with Claude Opus 4.5.

    • Sep 29, 2025 Claude Sonnet 4.5

      Claude Sonnet 4.5, released on 29 September 2025, was a drop-in replacement for Sonnet 4 at the same price. Anthropic reported that it could stay focused on complex tasks for more than 30 hours.

    • Nov 24, 2025 Claude Opus 4.5

      Claude Opus 4.5, released on 24 November 2025, cost a third as much as Opus 4.1 per token and introduced an effort parameter that lets developers trade capability for time and cost. Claude Opus 4.6 succeeded it.

  4. 2026
    • Feb 5, 2026 Claude Opus 4.6

      Released on 5 February 2026, Claude Opus 4.6 was an upgrade to Anthropic's smartest model. It was the first Opus-class model with a 1M-token context window, in beta at launch, and it introduced agent teams in Claude Code.

    • Feb 17, 2026 Claude Sonnet 4.6

      Released on 17 February 2026 with a 1M-token context window in beta, Claude Sonnet 4.6 kept the price of Sonnet 4.5 and became the default model for Free and Pro users on claude.ai.

    • Apr 16, 2026 Claude Opus 4.7

      Released on 16 April 2026 at the same price as Opus 4.6, Claude Opus 4.7 added an xhigh effort level and accepted much larger images. It was the first model to test automatic blocking of high-risk cybersecurity requests.

    • May 28, 2026 Claude Opus 4.8

      Released on 28 May 2026 at the same price as Opus 4.7, Claude Opus 4.8 added a fast mode at 2.5 times the speed, with fewer unnoticed flaws in its own code. Anthropic called it a modest but tangible improvement.

    • Jun 30, 2026 Claude Sonnet 5

      Claude Sonnet 5, released on 30 June 2026, is Anthropic's most agentic Sonnet model. It can make plans, use browsers and terminals, and run autonomously, at an introductory price of $2 and $10 per million tokens.

    • Jul 24, 2026 Claude Opus 5

      Claude Opus 5, released on 24 July 2026 at $5 and $25 per million tokens, is Anthropic's most aligned model to date and its most capable generally available model for scientific research.

    • Sep 22, 2026 Claude Opus 5.5

      Claude Opus 5.5, released on 22 September 2026, is the first model in Anthropic's Claude 5.5 family. Anthropic said it performs at the level of Fable 5.1 on most work, at about 40% lower cost than Opus 5.

    • Sep 28, 2026 Claude Sonnet 5.5

      Claude Sonnet 5.5, released on 28 September 2026, is the second model in the Claude 5.5 family and Anthropic's fastest Sonnet to date. It costs $2 and $10 per million tokens, with cache reads halved in October 2026.

20243

  1. PaperAnthropic and Redwood Research demonstrate 'alignment faking' in Claude 3 Opus

    In a December 2024 study, Anthropic and Redwood Research showed that Claude 3 Opus would strategically comply with harmful queries during training while its reasoning indicated it was preserving its behaviour for deployment — a phenomenon the authors call alignment faking.

  2. ReleaseAnthropic launches the Claude Team plan and iOS app

    On 1 May 2024 Anthropic announced a Claude Team plan at $30 per user per month with a five-seat minimum, plus a free Claude iOS app that syncs chat history with the web.[^1]

  3. ReleaseAnthropic introduces the Claude 3 model family

    On 4 March 2024 Anthropic announced the Claude 3 family: Haiku, Sonnet and Opus, in ascending order of capability. All three added vision and launched with a 200K-token context window.

Developed by1

Anthropic

Successor of1

Claude 2.1

Powers1

Claude apps (claude.ai)

Uses2

TransformerConstitutional AI

Notes and sources

  1. Introducing the next generation of Claudehttps://www.anthropic.com/news/claude-3-family
  2. Model deprecationshttps://platform.claude.com/docs/en/about-claude/model-deprecations
  3. Claude (language model)https://en.wikipedia.org/wiki/Claude_(language_model)

Cite this page: Claude 3 Opus. TellWorld, https://www.tellworld.net/models/claude-3-opus. Updated 2026-11-08