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Provider
Anthropic API pricing
Anthropic lists five models here, all with a 1M-token context window and all supporting reasoning, tool use and prompt caching; cached input is a flat tenth of the input rate throughout, and output is exactly five times input on every model. That leaves price as the axis of choice: $1 / $5 for Haiku 4.5, $2 / $10 for Sonnet 5 until its introductory rate ends on 31 August 2026 and $3 / $15 from 1 September 2026, $5 / $25 for Opus 5, and $10 / $50 for both Fable 5 and Mythos 5, the second of which is flagged limited availability on the Claude API. A factor of ten separates the cheapest from the dearest.
Model families
Several models share one commercial name. These pages compare the members of a family side by side.