Anthropic

Anthropic's product graphic for the Claude Sonnet 5.5 announcement.
Claude Sonnet 5.5 Keeps Sonnet 5's Price and Posts Anthropic's Terminal-Bench Jump
AI
On September 28, 2026, Anthropic introduced Claude Sonnet 5.5 at Sonnet 5's price, with a jump on Terminal-Bench.
Anthropic's announcement graphic for Claude Opus 5.5.
Anthropic Releases Claude Opus 5.5 at a Lower API Price
AI
On September 22, 2026, Anthropic released Claude Opus 5.5 at a lower API price.
Claude Fable wordmark
Anthropic Releases Claude Fable 5.1 and Claude Mythos 5.1
AI
On September 1, 2026, Anthropic released Claude Fable 5.1 and Claude Mythos 5.1.
Anthropic's Frontier-Bench chart for Claude Opus 5
Anthropic Releases Claude Opus 5 at the Opus 4.8 Price
AI
On July 24, 2026, Anthropic released Claude Opus 5 at the Opus 4.8 price.
Anthropic's published cost and performance chart for Sonnet 5
Claude Sonnet 5 Is Now the Default on Free and Pro
AI
On June 30, 2026, Anthropic released Claude Sonnet 5 and made it the default model on the Free and Pro plans.
Anthropic's published bar chart of agentic coding scores
Claude Fable 5 Is the Mythos-class Model Anthropic Made for General Use
AI
On June 9, 2026, Anthropic launched Claude Fable 5, a Mythos-class model it says is safe for general use, alongside Claude Mythos 5.
Official graphic from Anthropic's Claude Opus 4.8 announcement
Claude Opus 4.8 Keeps the Opus 4.7 Price and Adds an Effort Dial
AI
On May 28, 2026, Anthropic released Claude Opus 4.8 at the Opus 4.7 price and added a new effort control.