Claude Opus 4.5 API Cost Calculator
Estimate your monthly API costs for Claude Opus 4.5 from Anthropic.
Pricing per 1M tokens
Pricing last verified: Mar 21, 2026
30-Day Price History
Solid line: input price · Dashed line: output price
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Cost Breakdown
Compare with Similar Models
| Model | Input/1M | Output/1M |
|---|---|---|
| Claude opus 4 6 V1anthropic.claude sonnet 4 6anthropic.Claude haiku 4 5 20251001 V1 Anthropic | $5.00 | $25.00 |
| Claude opus 4 6Claude sonnet 4 6Claude haiku 4 5 Anthropic | $5.00 | $25.00 |
| Claude opus 4 6Claude sonnet 4 6Claude haiku 4 5aws Anthropic | $5.00 | $25.00 |
| Claude Opus 4.6 Anthropic | $5.00 | $25.00 |
| Claude 3.5 Sonnet Anthropic | $6.00 | $30.00 |
Frequently Asked Questions
How much does Claude Opus 4.5 cost per token?
Claude Opus 4.5 is priced at $5.00 per 1M input tokens and $25.00 per 1M output tokens. Use the calculator above to estimate your monthly costs based on your usage volume.
What is the context window for Claude Opus 4.5?
Claude Opus 4.5 has a context window of 200K tokens (200,000 tokens). The maximum output length is 64K tokens.
Does Claude Opus 4.5 support image inputs (vision)?
Yes, Claude Opus 4.5 supports vision/image inputs. You can send images as part of your prompts.
Does Claude Opus 4.5 support function calling (tool use)?
Yes, Claude Opus 4.5 supports function calling (also called tool use). You can define custom functions that the model can invoke as part of its responses.
How does Claude Opus 4.5 compare to similar models?
Claude Opus 4.5 costs $5.00 input and $25.00 output per 1M tokens. Claude Opus 4.5 is competitively priced compared to Claude Opus 4.6 ($5.00 input / $25.00 output per 1M tokens). See the "Compare with Similar Models" table above, or visit the Claude Opus 4.6 page at /tools/cost-calculator/anthropic/claude-opus-4-6.