Longterm Wiki

Claude 4 (Opus 4, Sonnet 4)

AnthropicModel Releasesclaude-4

Record Metadata

Record Keyclaude-4
EntityAnthropic
CollectionModel Releases(11 records total)
SchemaAI model releases in chronological order.
YAML Filepackages/kb/data/things/mK9pX3rQ7n.yaml

Fields

NameClaude 4 (Opus 4, Sonnet 4)
ReleasedMay 2025
DescriptionOpus 4 was first model under ASL-3; improved coding capabilities
Safety LevelASL-3 (Opus), ASL-2 (Sonnet)
Sourceanthropic.com
Notes72.5% SWE-bench (Opus), 72.7% (Sonnet)

Other Records in Model Releases (10)

KeyNameReleasedDescription
claude-1Claude 1Mar 2023Initial Claude model release
claude-2Claude 2Jul 2023Major capability upgrade
claude-3Claude 3 (Haiku, Sonnet, Opus)Mar 2024Three-tier model family; Opus was most capable model at launch
claude-3-5-sonnetClaude 3.5 SonnetJun 2024Outperformed larger Opus model; launched with Artifacts feature
claude-3-5-sonnet-v2Claude 3.5 Sonnet v2 + 3.5 HaikuOct 2024Updated Sonnet with Computer Use beta; new Haiku model
claude-sonnet-4-5Claude Sonnet 4.5Sep 2025Mid-generation refresh
claude-haiku-4-5Claude Haiku 4.5Oct 2025Smallest model in 4.5 family
claude-opus-4-5Claude Opus 4.5Nov 202580.9% SWE-bench Verified — first model above 80%; 42% enterprise coding share
claude-opus-4-6Claude Opus 4.6Feb 2026Agent teams, PowerPoint generation; flagship model
claude-sonnet-4-6Claude Sonnet 4.6Feb 2026Same pricing as Sonnet 4.5; default for free and Pro users
Record: claude-4 | Longterm Wiki