Claude 1
Claude 1 established a distinct frontier path emphasizing steerability, document work, and natural dialogue.
FAMILY / ANTHROPIC
Claude
A family rooted in Constitutional AI that progressed through long context, hybrid reasoning, and sustained tool use.
- First model
- 2023
- Models
- 16
- Latest
- Claude Opus 5
01 / LINEAGE MAP
Model lineage
predecessor derived from
02 / GENERATIONS
What changed
Claude 2
Claude 2 made long-document handling a central product dimension in frontier-model competition.
Claude 3 Opus
Claude 3 established the Haiku/Sonnet/Opus capability tiers and made vision a standard family direction.
Claude 3.7 Sonnet
It merged the boundary between separate reasoners and general chat models into hybrid reasoning, while bringing coding agents into the main product line.
Claude Opus 4
The Claude 4 flagship, focused on long-running coding, complex agents, and sustained multi-hour execution.
Claude Sonnet 4
The balanced Claude 4 tier with stronger coding, reasoning, instruction following, and parallel tool use.
Claude Sonnet 4.5
Strengthened long-running coding, computer use, and complex agents alongside the Claude Agent SDK.
Claude Haiku 4.5
A low-latency Haiku model offering near-Sonnet-4 coding and computer-use capability at lower cost.
Claude Opus 4.5
Introduced effort control with stronger coding, agents, computer use, and multi-agent coordination.
Claude Opus 4.6
Brought a 1M context beta to Opus with stronger long-running agents, code review, and adaptive thinking.
Claude Sonnet 4.6
A full Sonnet 4.5 upgrade across coding, computer use, long context, agent planning, and design.
Claude Opus 4.7
Focused on hard software engineering, long-run consistency, higher-resolution vision, and self-verification.
Claude Opus 4.8
Improved agent judgment, tool efficiency, computer use, and long-session collaboration over Opus 4.7.
Claude Fable 5
Fable 5 reflects a move toward layered deployment safeguards, including model fallback, rather than a single refusal policy.
Claude Sonnet 5
A new Sonnet generation with a default 1M context, adaptive thinking, and stronger agent capability closer to Opus.
Claude Opus 5
The new Opus flagship with a default 1M context and adaptive thinking for long-running agents, research, and enterprise work.