---
id: "2023-07-11-claude-2"
url: "https://postcutoff.com/e/2023-07-11-claude-2/"
as_of: "2026-11-13T13:49:00+01:00"
date: "2023-07-11"
date_precision: day
category: model-release
importance: 3
confidence: high
status: [Confirmed]
sources: 2
editor: human editor
human_review: null
version: "2026-10-04"
---

As of: 2026-11-13 13:49 CET.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code), with a human editor. How we work: https://postcutoff.com/about/
Canonical page: https://postcutoff.com/e/2023-07-11-claude-2/

# Anthropic releases Claude 2 with public claude.ai access

Claude 2 improved coding, math and reasoning, offered a 100K-token context window, and launched with the public claude.ai beta in the US and UK.

## Key facts
- Released 11 July 2023
- 100K-token context window
- Scored 76.5% on the multiple-choice section of the Bar exam (per Anthropic)
- Claude 2.1 (November 2023) doubled context to 200K tokens

## What happened

Anthropic released a stronger model and made its consumer chat product broadly available for the first time.

## Why it matters

Established Claude as a mainstream alternative to ChatGPT and pushed long-context as a competitive feature.

## Your AI and this story

- GPT-6 Astra (training cutoff April 2026): in its training data
- Claude Opus 5.5 (training cutoff June 2026): in its training data
- Gemini 4 Hydrogen (training cutoff March 2026): in its training data
- Grok 4.7 (training cutoff May 2026): in its training data

## Sources

1. [Claude 2 (Anthropic)](https://www.anthropic.com/news/claude-2) (anthropic.com, official)
2. [Introducing Claude 2.1 (Anthropic)](https://www.anthropic.com/news/claude-2-1) (anthropic.com, official)

## Changes

- 2026-09-29 (filed): Created

## Related

- 2024-03-04: [Anthropic launches the Claude 3 family (Opus, Sonnet, Haiku)](https://postcutoff.com/e/2024-03-04-claude-3/index.md)
- 2023-03-14: [Anthropic releases Claude](https://postcutoff.com/e/2023-03-14-claude-1/index.md)