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Model Timeline

Timeline of claude-21

Every recorded change for this model by Anthropic, newest first. Back to the entity page →

4 events

Year

All years 2026

Category · events in the last 365 days

All categories Benchmarks4,947 Models2,337 Companies1,601 Research1,104 Releases1,019 Providers & pricing640 Datasets146 Frameworks136 Hardware44 Pricing14 Repositories10

Filtered to one entity. Show the whole atlas

Sept 20264

Sept 2026 4

11 Sept 2026
New modelModelclaude-21Anthropic
New model: claude-21 (Anthropic)
artificial_analysis
artificialanalysis.ai

11 Sept 2026

Benchmark resultModelclaude-21Anthropic

claude-21 scores 3.89% on Humanity's Last Exam

artificial_analysis

artificialanalysis.ai

11 Sept 2026

Benchmark resultModelclaude-21Anthropic

claude-21 scores 31.92% on GPQA

artificial_analysis

artificialanalysis.ai

11 Sept 2026

Benchmark resultModelclaude-21Anthropic

claude-21 scores 5.59 on Artificial Analysis Intelligence Index

artificial_analysis

artificialanalysis.ai

Showing up to 400 events. Narrow by year or category, or use the changes feed for cursor-paged history. Times are UTC.