A Spellwright Studios publication About

Spellwright News

AI Intelligence

Model timeline

Newest first, by the first day the public could use each model. Models that were announced but not released are listed by their announcement date.

WeightsAll Open weights Closed

CompanyAll Google Anthropic Qwen Team OpenAI Mistral AI Meta BigScience Workshop EleutherAI

11 models

2026

Sep 28, 2026Claude Sonnet 5.5 · AnthropicClosed
Sep 22, 2026Claude Opus 5.5 · AnthropicClosed
Jul 24, 2026Claude Opus 5 · AnthropicClosed
Jun 30, 2026Claude Sonnet 5 · AnthropicClosed

2024

Mar 13, 2024Claude 3 Haiku · AnthropicClosed200K context
Mar 4, 2024Claude 3 Opus · AnthropicClosed200K context
Mar 4, 2024Claude 3 Sonnet · AnthropicClosed

2023

Nov 21, 2023Claude 2.1 · AnthropicClosed200K context
Jul 11, 2023Claude 2 · AnthropicClosed
Mar 14, 2023Claude (March 2023 release) · AnthropicClosed
Mar 14, 2023Claude Instant (March 2023 release) · AnthropicClosed