# Claude Sonnet 5: AI model fact sheet

- **Provider:** anthropic
- **Released:** 2026-06-30
- **Context window:** 1,000,000 tokens
- **API pricing:** $2.00 / 1M input, $10.00 / 1M output
- **OpenRouter ID:** anthropic/claude-sonnet-5
- **Capabilities:** conversation, reasoning, code-generation, analysis, agentic-tool-use, tool-use

Sonnet 5 is Anthropic's most capable Sonnet-class model, with frontier performance across coding, agents, and professional work. It supports adaptive thinking with selectable reasoning effort levels (low, medium, high, max, and x-high), a 1M-token context window, and text, image, and file inputs. Sonnet 5 uses an updated tokenizer and includes real-time cyber safeguards that block certain high-risk dual-use activities.

Source: real side-by-side outputs, pricing and specs at https://rival.tips/models/claude-sonnet-5