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Claude Models & Versions - Complete List 2026

Claude Sonnet, Opus, Haiku, Fable and Mythos versions from Anthropic, ordered by current release status and release date.

28 tracked versionsDeveloper: AnthropicChecked: 2026-09-30

Claude is Anthropic's model family for coding, agents, analysis, writing, long-context work and specialized research. This page groups Sonnet, Opus, Haiku, Fable and Mythos releases so a Claude search surfaces the newest models first while retaining older versions people still search for.

LATEST MODEL

Claude Sonnet 5.5

Advanced coding, agents and broad production workloads

Latest
MODEL LINEAGE

All Claude versions

Official source ->
ModelReleaseBest forStatus
Claude Sonnet 5.5claude-sonnet-5-5Sep 28, 2026Advanced coding, agents and broad production workloadsLatest
Claude Opus 5.5Sep 22, 2026Complex work requiring careful judgment, coding and long-horizon agent workflowsCurrent
Claude Fable 5.1Sep 1, 2026Frontier coding, knowledge work and advanced research-oriented workflowsCurrent
Claude Mythos 5.1Sep 1, 2026Advanced cybersecurity and life-sciences research for vetted organizationsCurrent
Claude Opus 5claude-opus-5Jul 24, 2026Complex reasoning, coding and long-running agent workflowsCurrent
Claude Sonnet 5claude-sonnet-5Jun 30, 2026High-quality coding, tool use and general agent workflowsCurrent
Claude Fable 5claude-fable-5Jun 9, 2026Ambitious coding, professional work and long-running knowledge tasksCurrent
Claude Mythos 5Jun 9, 2026Specialized cybersecurity and biology research with restricted accessCurrent
Claude Opus 4.8claude-opus-4-8May 28, 2026Strong Opus-generation coding, agents and professional workCurrent
Claude Opus 4.7claude-opus-4-7Apr 16, 2026Complex reasoning, vision, coding and multi-step agent workflowsCurrent
Claude Sonnet 4.6claude-sonnet-4-6Feb 17, 2026Supported Sonnet-generation coding, agents and general assistant workflowsCurrent
Claude Opus 4.6claude-opus-4-6Feb 5, 2026Supported Opus-generation reasoning, coding and analysisCurrent
Claude Opus 4.5claude-opus-4-5-20251101Nov 24, 2025Supported Opus 4 generation coding, agents and computer-use workloadsCurrent
Claude Haiku 4.5claude-haiku-4-5-20251001Oct 15, 2025Fast Claude workloads where lower latency and cost matterCurrent
Claude Sonnet 4.5claude-sonnet-4-5-20250929Sep 29, 2025Supported Sonnet 4 generation coding and production workflowsCurrent
Claude Fable 5claude-fable-5Not specifiedCurrent Anthropic model-family workloads where Fable is supportedCurrent
Claude Opus 4.7claude-opus-4-7Not specifiedPrevious Opus-generation complex reasoning and agent workflowsCurrent
Claude Opus 4.8claude-opus-4-8Not specifiedStrong Opus-generation reasoning and coding workloadsCurrent
Claude Sonnet 4.6claude-sonnet-4-6Not specifiedSupported Sonnet-generation coding and general assistant workflowsCurrent
Claude Opus 4.1claude-opus-4-1-20250805Aug 5, 2025Migration research for retired Opus 4.1 integrationsRetired
Claude Opus 4claude-opus-4-20250514May 22, 2025Historical Opus 4 comparisons and migration researchRetired
Claude Sonnet 4claude-sonnet-4-20250514May 22, 2025Historical Sonnet 4 comparisons and migration researchRetired
Claude Sonnet 4claude-sonnet-4-20250514May 14, 2025Historical Sonnet 4 comparisons and migration researchRetired
Claude 3.7 Sonnetclaude-3-7-sonnet-20250219Feb 19, 2025Legacy Claude 3.7 compatibility and migration researchRetired
Claude 3.7 Sonnetclaude-3-7-sonnet-20250219Feb 19, 2025Legacy Claude 3.7 compatibility and migration researchRetired
Claude 3.5 Haikuclaude-3-5-haiku-20241022Oct 22, 2024Legacy Haiku compatibility and migration researchRetired
Claude 3.5 Haikuclaude-3-5-haiku-20241022Oct 22, 2024Legacy Haiku compatibility and migration researchRetired
Claude 3 Haikuclaude-3-haiku-20240307Mar 7, 2024Historical Claude 3 Haiku comparisons and migration researchRetired

Latest Claude models

Tracked releases in this part of the model lineage.

Current Claude models

Tracked releases in this part of the model lineage.

Retired Claude models

Kept for historical searches, compatibility and migration research.