Claude
Claude 4 Opus by Anthropic is the strongest model for deep document analysis, nuanced writing, and complex reasoning. 200K token context, outstanding writing style.
What is Claude?
Claude is an AI assistant by Anthropic — founded in 2021 by former OpenAI researchers. The model family consists of three tiers: Haiku (fast, free), Sonnet (all-rounder), and Opus (most powerful model). Claude 4 Opus is as of 2026 the strongest available model for complex tasks.
Claude in our review: Strengths and weaknesses
Claude 4 Opus excels with long documents (200,000 token context), nuanced analysis, creative writing, and security-critical code. Answers are more precise and differentiated than other models — especially for ethical reasoning and complex argumentation. Weaknesses: no native image generation feature and fewer third-party integrations than ChatGPT.
Pricing and plans
Claude is free with access to Claude Haiku. Claude Pro costs $20/month and provides full access to Claude Opus — the most powerful model. Claude Team costs $30/user/month. Claude is also available via the Anthropic API on a pay-per-use basis.
Who is Claude for?
Claude 4 Opus is especially well-suited for writers, analysts, researchers, and developers who work with long documents, complex texts, and demanding reasoning tasks. For nuanced long-form English content, Claude is the top choice among all AI models.