anthropic
Anthropic: Claude Opus 4.5 API Pricing
Anthropic: Claude Opus 4.5 costs $5.00 per 1M input tokens and $25.00 per 1M output tokens (cache reads: $0.500). Context window: 200K. Prices verified 2026-08-23 · source
Input / 1M tokens
$5.00
Output / 1M tokens
$25.00
Context window
200K
Max output
64K
What would Anthropic: Claude Opus 4.5 cost you per month?
| Workload | Requests/mo | Avg tokens (in/out) | Est. monthly cost |
|---|---|---|---|
| Light chatbot | 10,000 | 800 / 400 | $140.00 |
| Coding agent | 5,000 | 8,000 / 2,000 | $450.00 |
| RAG pipeline | 30,000 | 4,000 / 500 | $975.00 |
| Doc summarizer | 2,000 | 20,000 / 1,000 | $250.00 |
Estimates use list prices without prompt caching. Caching can cut input cost by up to 90% on repeated context.
About Anthropic: Claude Opus 4.5
Claude Opus 4.5 is Anthropic’s frontier reasoning model optimized for complex software engineering, agentic workflows, and long-horizon computer use. It offers strong multimodal capabilities, competitive performance across real-world coding and...
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Official resources
- Anthropic: Claude Opus 4.5 on OpenRouter — live endpoint, pricing source of record.
- Get an OpenRouter API key → — one key, every model including 4.5. Free credits on signup.
- Shred your current bill — paste a CSV and see if switching saves money.