All Changes
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Pricing ChangeMinor
Oct 10, 2026 (UTC)Anthropic
claude-app
Anthropic Claude app pricing page adds API credit offer
Impact
Cost Impact: Low2/5
Pricing ChangeImportant
Oct 8, 2026 (UTC)Anthropic
claude-appAnthropic Claude App Adds New Creative Tools, Removes Training Opt-Out
Impact
Cost Impact: HighMigration: Recommended5/5
DeprecationMajor
Oct 8, 2026 (UTC)Anthropic
anthropic-claude-haiku-4-5-20251001Claude Haiku 4.5 removed from Anthropic models documentation
Impact
Migration: Recommended3/5
API BreakingMajor
Oct 5, 2026 (UTC)Anthropic
anthropic-claude-opus-4-5-20251101Anthropic adds `line` field to model responses for grouping
Impact
Migration: Recommended2/5
New LaunchMajor
Sep 28, 2026 (UTC)Anthropic
anthropic-claude-sonnet-5Claude Sonnet 5.5 released, replacing Sonnet 5
Impact
Migration: Recommended3/5
New LaunchMajor
Sep 23, 2026 (UTC)Anthropic
anthropic-claude-opus-5Anthropic Claude model lineup updated with new IDs, pricing, and retirement date
Impact
Cost Impact: HighMigration: Required4/5
New LaunchMajor
Sep 22, 2026 (UTC)Anthropic
anthropic-claude-fable-5.1Claude Opus 5.5 replaces Opus 5 with lower pricing and new API ID
Impact
Cost Impact: HighMigration: Required4/5
DeprecationMajor
Sep 1, 2026 (UTC)Anthropic
claude-haiku-4.5Anthropic introduces Claude Fable 5.1, replacing Fable 5
Impact
Cost Impact: LowMigration: RecommendedVerified3/5
New LaunchMajor
Aug 14, 2026 (UTC)Anthropic
claude-codeAnthropic docs page structure update with new model announcements
Impact
Cost Impact: Low3/5
DeprecationMajor
Jul 24, 2026 (UTC)Anthropic
claude-opus-4Claude Opus 4.8 replaced by Claude Opus 5 in model table
Impact
Migration: RecommendedVerified3/5
Pricing ChangeModerate
Jul 15, 2026 (UTC)Anthropic
anthropic-pricingAnthropic pricing page updated
Impact
Cost Impact: HighVerified4/5
New LaunchMajor
Jul 15, 2026 (UTC)Anthropic
claude-sonnet-4Claude Mythos 5 limited availability launch with platform reordering
Impact
3/5
New LaunchMajor
Jul 10, 2026 (UTC)Anthropic
claude-opus-4Claude Opus 4.8 migration notice replaces 4.7 reference
Impact
Migration: Recommended3/5
New LaunchMajor
Jul 1, 2026 (UTC)Anthropic
claude-opus-4Anthropic adds Claude Opus 4.8, Sonnet 5, Haiku 4.5 to models table with pricing
Impact
Cost Impact: HighMigration: Recommended3/5
New LaunchMajor
Jun 30, 2026 (UTC)Anthropic
claude-opus-4Claude Sonnet 5 replaces Sonnet 4.6 with new pricing and features
Impact
Cost Impact: HighMigration: Recommended3/5
Pricing ChangeModerate
Jun 30, 2026 (UTC)Anthropic
anthropic-pricingAnthropic pricing page updated
Impact
Cost Impact: HighVerified4/5
New LaunchImportant
Jun 30, 2026 (UTC)Anthropic
claude-sonnet-5Anthropic launched Claude Sonnet 5 with introductory API pricing
Impact
Cost Impact: HighMigration: RecommendedVerified5/5
New LaunchMajor
Jun 11, 2026 (UTC)Anthropic
claude-opus-4Claude Opus 4.8 removed from models page, Fable 5 and Mythos 5 added
Impact
Cost Impact: LowMigration: Required4/5
New LaunchImportant
Jun 9, 2026 (UTC)Anthropic
claude-fable-5Anthropic launched Claude Fable 5 for long-running frontier work
Impact
Cost Impact: HighMigration: RecommendedVerified5/5
New LaunchMajor
May 28, 2026 (UTC)Anthropic
claude-opus-4-8Anthropic upgraded its Opus line to Claude Opus 4.8
Impact
Cost Impact: LowMigration: RecommendedVerified4/5