Claude Sonnet 5
Anthropic
Anthropic's most agentic Sonnet-class model (June 2026), narrowing the gap to Opus 4.8 on reasoning, tool use, coding, and computer use while staying far cheaper. Features a 1M-token context window with context compaction and adaptive thinking with selectable effort up to 'extra high' (xhigh). It is the default model for Claude Free and Pro plans.
Strengths
- Anthropic's most agentic Sonnet-class model, an upgrade over Sonnet 4.6
- Narrows the gap to Opus 4.8 on reasoning, tool use, coding, and computer use
- 1M-token context window with context compaction
- Adaptive thinking with selectable effort up to 'extra high' (xhigh)
- Strong SWE-bench Verified coding, Terminal-Bench command-line, and OSWorld computer-use performance
- Steep discount to Opus-class pricing ($3/$15 after intro)
Caveats
- Below Opus 4.8 and Fable 5 on the very hardest reasoning/agentic tasks
- Introductory $2/$10 pricing rises to $3/$15 after Aug 31, 2026
- No audio input (text + vision only)
- Vendor
- Anthropic
- Context Window
- 1,000,000 tokens
- License
- Proprietary
- Release Date
- 2026-06-30
- Modalities
- textimage
Capabilities
Vision
Audio
Video
Tool Use
Resources
Pricing
Introductory pricing of $2 per 1M input / $10 per 1M output through Aug 31, 2026, then $3 / $15. Available in Claude Code and the Claude Platform; default model on Free and Pro plans.