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Model Timeline

Timeline of Claude Opus 4.1

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 Companies1,567 Models1,353 Releases1,016 Research965 Providers & pricing604 Datasets81 Frameworks66 Hardware33 Benchmarks27 Repositories10

Filtered to one entity. Show the whole atlas

Sept 20264

Sept 2026 4

11 Sept 2026
Listed by providerModelClaude Opus 4.1Anthropic
Anthropic API lists Claude Opus 4.1 at $7.5 in / $37.5 out per 1M tokens
openrouter
openrouter.ai

11 Sept 2026

Listed by providerModelClaude Opus 4.1Anthropic

Anthropic API lists Claude Opus 4.1 at $15 in / $75 out per 1M tokens

openrouter

openrouter.ai

11 Sept 2026

New modelModelClaude Opus 4.1Anthropic

New model: Claude Opus 4.1 (Anthropic)

anthropic

platform.claude.com

11 Sept 2026

Listed by providerModelClaude Opus 4.1Anthropic

Anthropic API lists Claude Opus 4.1 at $15 in / $75 out per 1M tokens

anthropic

platform.claude.com

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