Claude Opus 5 pricing and token costs
Claude Opus 5 is a Anthropic model with a 1,000,000-token context window. Rates below are per million tokens, and are the ones in effect today.
In practice
At $5 per million input this is the most expensive Anthropic model in the catalogue. Its million-token ceiling carries no tiered pricing whatsoever, so the rate holds steady however much text you send. Its five-to-one output ratio sits between the GPT-4o family's four and the GPT-5.6 line's six. One caveat specific to this page: Claude counts shown here are estimated from a characters-per-token ratio rather than produced by Anthropic's own tokenizer, so read them as close approximations rather than exact figures.
Pricing
- Input, per 1M tokens
- $5.00
- Output, per 1M tokens
- $25.00
- Context window
- 1,000,000 tokens
- Tokenizer
- Anthropic tokenizer
Input and output combined.
Estimated from character length, in your browser.
Alternatives
Head to head
Articles that quote these figures
Common questions
- How much does Claude Opus 5 cost per million tokens?
- $5.00 per million input tokens and $25.00 per million output tokens.
- What is the context window of Claude Opus 5?
- 1,000,000 tokens, covering input and output combined.
- Which tokenizer does Claude Opus 5 use?
- Claude Opus 5 is tokenized by Anthropic, which publishes no tokenizer that can run in a browser. Counts here are a character-based estimate and are labelled "est".
Figures come from Anthropic’s published list prices and are checked against every article on this site that quotes them at build time. They are still estimates of what a request costs — verify against your own billing before committing to them. See the methodology page for how these numbers are actually calculated.