Claude

Anthropic's AI assistant — safe, helpful, and honest by design

Anthropic Constitutional AI RLHF API Claude Code
Model Comparison
Capability Haiku 4.5 Sonnet 4.6 Opus 4.6
Speed⚡ Fastest⚡ Fast🐢 Slower
Complex reasoning★★★★★★★★★★★★
Coding (HumanEval)~75%~90%~93%
Context window200K200K200K
Vision / images
Tool / function use
Extended thinking
Cost (relative)LowestMediumHighest
Best use caseReal-time, bulkGeneral productionHard problems