Anthropic releases Claude
Confirmed
Importance: major (4 of 5)The takeaway
Anthropic opened access to Claude, its AI assistant trained with Constitutional AI, in two versions: Claude and the faster, cheaper Claude Instant.
Status
- Claim
Confirmed
- Our reporting
- High confidence
- Importance
- Major (4 of 5)
- Last verified
- 29 September 2026
Your AI and this story
- GPT-6 AstraIn its training data
- Claude Opus 5.5In its training data
- Gemini 4 HydrogenIn its training data
- Grok 4.7In its training data
It happened before the cutoffs of all four assistants, so it can be in their training data.
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.
Sources
2 sources from 1 site. Numbers match the chips in the text.
2 sources: 2 primary
Primary
- Introducing Claude (Anthropic)anthropic.com, official
- Introducing 100K Context Windows (Anthropic)anthropic.com, official
Changes
- Filed