Anthropic releases Claude
Anthropic opened access to Claude, its AI assistant trained with Constitutional AI, in two versions: Claude and the faster, cheaper Claude Instant.
Key facts
- Announced 14 March 2023 (same day as GPT-4)
- Two tiers: Claude and Claude Instant
- Available via chat interface and API to early partners (e.g. Notion, Quora's Poe, DuckDuckGo)
- Context window expanded to 100K tokens in May 2023
What happened
Following closed testing, Anthropic made Claude available to businesses through an API and partner integrations.
Why it matters
Started the Claude model family, which became a leading competitor to GPT models, especially in coding and agents.
Changelog
- 2026-09-29: created
Related events
- Anthropic introduces Constitutional AI (RLAIF) ★★★★
- Anthropic releases Claude 2 with public claude.ai access ★★★
- Anthropic launches with a focus on AI safety ★★★
- OpenAI releases GPT-4 ★★★★★
Sources (2)
id: 2023-03-14-claude-1 · updated 2026-09-29 · open in the interactive timeline