Claude

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

Anthropic Constitutional AI RLHF API Claude Code
Claude Model Family
Claude Haiku
Fast · Efficient

The fastest and most compact Claude model. Ideal for high-throughput tasks, real-time interactions, and cost-sensitive workloads where speed matters most.

Context window200K tokens
Latestclaude-haiku-4-5
Best forSummarization, classification, quick Q&A
Claude Sonnet
Balanced · Capable

The ideal balance of intelligence and speed. Sonnet excels at complex reasoning, coding, analysis, and writing — the go-to model for most production use cases.

Context window200K tokens
Latestclaude-sonnet-4-6
Best forCoding, analysis, complex tasks
Claude Opus
Powerful · Deep Reasoning

Anthropic's most intelligent model. Opus handles the most demanding tasks — research synthesis, expert-level coding, nuanced writing, and multi-step reasoning chains.

Context window200K tokens
Latestclaude-opus-4-6
Best forResearch, hard problems, expert tasks