Claude Opus 5

Claude Opus 5 is Anthropic's strongest Claude Opus model for coding, agents, and professional work. It is the latest in the claude-opus line, succeeding Claude Opus 4.8. It has a 1,000,000 token context window and a 128,000 token max output. It accepts image, PDF, and text inputs, and returns text. It supports reasoning mode and tool calling. Weights are not open. Pricing starts at $5.00 per million input tokens and $25.00 per million output tokens, with cached input at $0.50 per million tokens. It is served by 31 hosts.

Against Claude Opus 4.8: input $0.425 to $5.00, output $2.13 to $25.00, cached input $0.15 to $0.50.

Range across the hosts that serve it: up to $12.00 per 1M input tokens.

• ·1M token context window
• ·128K max output tokens
• ·Supports reasoning mode and tool calling
• ·Accepts image, PDF, and text inputs
• ·Cached input at $0.50 per million tokens

• Reach for it for complex coding tasks
• Reach for it for agentic workflows
• Reach for it for professional document analysis
• Reach for it for long-context reasoning

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

• 8Arena Test: GPT-6 Sol (Max) Ranks 4th in Code Arena: WebDev with a Score of 16892026-09-24
• 9OpenAI Releases GPT-6 Sol and GPT-6 Luna, API Prices 50% Lower Than GPT-5.62026-09-23
• 6OpenAI goes from hacker to hacked2026-09-22
• 9那个教 ChatGPT 说话的人，做了一个「哑巴」模型2026-09-19
• 7Researchers used Anthropic’s Claude to hack into OpenAI2026-09-19

5 signals 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?

The context window is 1,000,000 tokens.

Is it open weights?

No, the weights are not open.

What is the price?

From $5.00 per million input tokens and $25.00 per million output tokens. Cached input is $0.50 per million tokens.