Claude Sonnet 5

Claude Sonnet 5 is an everyday Claude agent model for coding, planning, browsing, and general work. It is the latest in the claude-sonnet line, following Claude Sonnet 4.6. It has a 1,000,000 token context window and a 128,000 token output limit. Pricing starts at $1.44 per million input tokens and $7.20 per million output tokens, with cached input at $0.20 per million tokens. The weights are not open. It supports reasoning mode, tool calling, and accepts image, pdf, and text inputs, returning text.

Against Claude Sonnet 4.6: input $0.90 to $1.44, output $5.55 to $7.20, cached input $0.09 to $0.20.

Range across the hosts that serve it: up to $3.00 per 1M input tokens.

• ·1M token context window
• ·128k token output limit
• ·Supports reasoning mode
• ·Supports tool calling
• ·Accepts image, pdf, and text

• Reach for it for coding tasks
• Reach for it for planning and browsing
• Reach for it for general work
• Reach for it for processing images and PDFs

34 hosts serve this model at the price above · the maker's documentation

• 9GitHub Security Lab Releases LLM-Driven Fuzzing Taskflow, Automating the Full Fuzzing Process for C/C++ Projects2026-09-25

1 signal of the archive mention this model, each scored against the published bar. This list is rebuilt from the archive at every build, so it cannot go stale.

The registry keeps the six most recent versions of a line. Older ones stay in the file and can be surfaced without a rebuild.

What is the context window?

1,000,000 tokens.

Are the weights open?

No, the weights are not open.

What does it cost?

From $1.44 per million input tokens and $7.20 per million output tokens, with cached input at $0.20 per million.