This model has been retired
Claude Opus 4.1 no longer appears on Anthropic's public price list (first noted August 2026). The rates below are its last listed prices, kept for the price archive — they are not currently purchasable at this rate. See the alternatives further down.
According to UsagePricing's tracker, Claude Opus 4.1 was last listed at $15.00 per 1M input tokens and $75.00 per 1M output tokens before Anthropic retired it. The model supported a 200,000-token context window.
Legacy Opus tier — complex analysis at the standard $15/$75 Opus rate.
Token Costs (per 1M)
Technical Specs
Price History
| Date | Input Price | Output Price |
|---|---|---|
| 3/16/2026 | $15.00 | $75.00 |
Compare Claude Opus 4.1 With Other Models
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Frequently Asked Questions
How much does Claude Opus 4.1 cost per 1M tokens? ▼
Claude Opus 4.1 costs $15 per 1M input tokens and $75 per 1M output tokens as of September 2026.
What is Claude Opus 4.1's context window? ▼
Claude Opus 4.1 has a context window of 200,000 tokens, meaning it can process approximately 150,000 words in a single request.
Who makes Claude Opus 4.1? ▼
Claude Opus 4.1 is made by Anthropic. You can access it via the Anthropic API.