Claude
Long-context AI for reasoning, writing, and agentic work
- Overview
- Anthropic's AI assistant is built around precise instruction-following, long-context analysis, and multi-step agentic tasks. The current lineup spans Haiku 4.5 (fast, low-cost) through the Sonnet and Opus 5.x tiers (adaptive thinking, 1M-token context) to Fable 5.1 (frontier reasoning). Claude Code extends the platform into terminal-based and IDE-integrated software development workflows.
- Why it matters
- Claude's 1M-token context and instruction-fidelity make it the practical choice for teams replacing manual document review, legal analysis, and multi-step research workflows. The shift from a chat assistant to a full agentic platform—with Claude Code, Cowork, and now government-grade deployment—means procurement decisions increasingly involve lock-in to Anthropic's tool ecosystem rather than just model quality. Pricing restructured in 2026 to separate heavy individual users (Max tiers) from team workflows, so buyers should model actual usage patterns before committing annually. The fast-moving 5.x model cadence (Opus 5 to 5.5 within months) creates version-management overhead for teams pinning API model IDs.
- In practice
- RevOps and strategy teams use Claude with large project contexts to synthesize call transcripts, RFPs, and internal wikis in a single session without chunking. Engineering teams run Claude Code in agentic mode for codebase-wide refactors, with mods providing custom tool-call interception and secret redaction before Claude reads output. A real limitation: Fable 5.1—the most capable tier—is gated behind Max or Team Premium plans and carries strict access controls, so teams expecting frontier-level reasoning at Team Standard pricing will be disappointed.
- Best for
- Developers, researchers, and enterprise teams that need deep reasoning, large-document analysis, or agentic coding pipelines
- Pricing
- Free; Pro $20/mo ($17/mo annual); Max $100–$200/mo; Team Standard $20/seat/mo annual ($25 monthly); Team Premium $100/seat/mo annual ($125 monthly); Enterprise $20/seat/mo annual plus API usage
Key features
- Up to 1M-token context window across Sonnet 5.x, Opus 5.5, and Fable 5.1
- Claude Code for agentic terminal, IDE, and coding workflows with mod/plugin support
- Artifacts for interactive, shareable content creation
- Cowork for autonomous long-running task execution without writing code
- Claude for Government: FedRAMP High authorized access with audit logs and spend controls
Quick answers
- What is Claude?
- Anthropic's AI assistant is built around precise instruction-following, long-context analysis, and multi-step agentic tasks. The current lineup spans Haiku 4.5 (fast, low-cost) through the Sonnet and Opus 5.x tiers (adaptive thinking, 1M-token context) to Fable 5.1 (frontier reasoning). Claude Code extends the platform into terminal-based and IDE-integrated software development workflows.
- Why does Claude matter?
- Claude's 1M-token context and instruction-fidelity make it the practical choice for teams replacing manual document review, legal analysis, and multi-step research workflows. The shift from a chat assistant to a full agentic platform—with Claude Code, Cowork, and now government-grade deployment—means procurement decisions increasingly involve lock-in to Anthropic's tool ecosystem rather than just model quality. Pricing restructured in 2026 to separate heavy individual users (Max tiers) from team workflows, so buyers should model actual usage patterns before committing annually. The fast-moving 5.x model cadence (Opus 5 to 5.5 within months) creates version-management overhead for teams pinning API model IDs.
- What is Claude best for?
- Developers, researchers, and enterprise teams that need deep reasoning, large-document analysis, or agentic coding pipelines
- How much does Claude cost?
- Free; Pro $20/mo ($17/mo annual); Max $100–$200/mo; Team Standard $20/seat/mo annual ($25 monthly); Team Premium $100/seat/mo annual ($125 monthly); Enterprise $20/seat/mo annual plus API usage
Seen in recent stories
Where Claude showed up in the last 90 days of KeyNews editions.
Know the terms
Glossary entries that explain what Claude is built on.
Context window
The maximum number of tokens a model can process in a single request, including both the prompt and the response. Larger context windows (100K-2M tokens) let models ingest entire codebases or documents at once.
Agentic workflow
A multi-step process where an AI agent plans, executes, evaluates, and iterates on tasks with minimal human intervention. Unlike single-turn prompts, agentic workflows involve loops, branching logic, and tool calls that unfold over minutes or hours.
Extended thinking
A model feature where the AI explicitly allocates additional inference compute to reason through complex problems step by step before producing a final answer, with the reasoning process visible to the user or developer.
Constitutional AI
A training methodology developed by Anthropic where an AI model evaluates its own outputs against a written set of principles (a 'constitution') and self-corrects, reducing reliance on human feedback for safety alignment.
Models behind it
The models Claude runs on, offers, or competes with.
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