Anthropic

Anthropic's Claude Fable 5.1 is the successor to Claude Fable 5 for long-running agentic coding, knowledge work, and research. Same $10/$50 list rates as Fable 5, with cache reads at $0.25 per million tokens and a 1M-token context window.

Mythos-class model built for autonomous knowledge work and coding with 1M-token context

Claude Haiku 4.5 delivers similar levels of coding performance at one-third the cost and more than twice the speed of larger Claude models.

Anthropic's Claude Opus 4.1 is a highly capable model for complex analysis, advanced coding, and multi-step reasoning with extended context support.

Anthropic's Claude Opus 4.5, a frontier-class model for complex analysis, advanced coding, and sophisticated multi-step reasoning tasks.

Anthropic's Claude Opus 4.6 delivers high-capability reasoning, advanced coding, and nuanced analysis in the Claude 4 flagship tier with extended context support.

Anthropic's Claude Opus 4.7 offers top-tier intelligence for sophisticated research, advanced coding, and multi-step agentic workflows.

Anthropic's most advanced Claude Opus 4.8 model, excelling at complex reasoning, frontier-level coding, and in-depth research with extended context support.

Claude Opus 4 is Anthropic's first-generation Claude 4 Opus model, optimized for complex reasoning, advanced coding, and deep analysis tasks.

Anthropic's Claude Opus 5.5 is the successor to Claude Opus 5 for long-running agentic coding and knowledge work. It delivers Fable 5.1-level performance at 40% lower cost ($4 / $20 per million input / output tokens), with adaptive thinking always on, 1M-token context, vision input, and tool use. Built for multi-step changes in large codebases, code review and bug finding, financial and scientific analysis, and reading dense charts and diagrams.

Fast-mode variant of Claude Opus 5 with the same capabilities and a 1,000,000-token context window, tuned for higher output speed.

Anthropic's Claude Opus 5 is the flagship model for demanding reasoning, coding, and long-horizon agentic work — end-to-end software tasks, code review and bug finding, visual analysis of charts and documents, and coordinating parallel subagents.

Anthropic's Claude Sonnet 4.5 balances speed and intelligence for demanding text, coding, and research tasks at a practical cost point.

Anthropic's Claude Sonnet 4.6 offers strong coding, analysis, and reasoning in a balanced performance-cost tier with a 1M-token context window.

Anthropic's Claude Sonnet 4, a versatile model combining strong reasoning, coding proficiency, and broad instruction-following capabilities.

Anthropic's Claude Sonnet 5.5 is the successor to Claude Sonnet 5 — the best combination of speed and intelligence in the lineup. It is the direct upgrade for well-scoped everyday work (building features, fixing bugs, drafting and review) at the same $2 / $10 per million input / output rates, with adaptive thinking on by default at `high` effort, 1M-token context, 128K max output, vision input, and tool use. Faster than Opus 5.5, cheaper, same window.

Anthropic's Claude Sonnet 5 is a cost-efficient agentic model with strong coding, tool-use, and reasoning at the balanced Sonnet performance-cost tier, with a 1M-token context window.