Processing or generating 5,000 words (approximately 6,600 tokens) with Claude Opus 4.8 (OpenRouter) ranges from $0.0033 (cached input) to $0.165 (full generation).
Quick answer
For 5,000 words, Claude Opus 4.8 (OpenRouter) processes approximately 6,600 tokens. That costs $0.033 as uncached input, $0.0033 with the modeled cache discount, or $0.165 when generated as output.
Method & trust
The estimate converts the selected English word count with the model tokenizer family, then applies the published input/output price per million tokens. Real prompts vary with code, formatting, language, and system instructions.
You send 5,000 words as prompt context, documentation, or background knowledge.
Claude Opus 4.8 (OpenRouter) drafts a complete 5,000 words article, chapter, or code module.
4,000 words input prompt + 1,000 words output reply.
| Model | Provider | Input Cost (5,000 words) | Cached Input Cost | Output Cost (5,000 words) | Context Limit |
|---|---|---|---|---|---|
| Claude Opus 4.8 (OpenRouter) (Current) | anthropic | $0.033 | $0.0033 | $0.165 | 1,000,000 |
| GPT-5.6 Sol | openai | $0.032 | $0.0032 | $0.192 | 1,050,000 |
| GPT-5.6 Cyber | openai | $0.08 | $0.008 | $0.48 | 1,050,000 |
| GPT-5.5 Standard | openai | $0.032 | $0.0032 | $0.192 | 512,000 |
| GPT-5.5 Pro | openai | $0.192 | $0.0192 | $1.152 | 512,000 |
| o3-pro (Frontier Reasoning) | openai | $0.128 | $0.0128 | $0.512 | 1,000,000 |
For Claude Opus 4.8 (OpenRouter) (claude_bpe tokenizer), 5,000 words is approximately 6,600 tokens (an average ratio of 1.32 tokens per word in English). Code, technical vocabulary, and non-English scripts will have higher token densities.
Sending 5,000 words as input costs $0.033 (or $0.0033 with prompt caching). Generating 5,000 words as output costs $0.165. Output tokens are more expensive because autoregressive token generation requires significantly more computation per token.
Yes! If your input text is part of a repeated context, prompt caching saves 50% to 90% (costing $0.0033). For non-urgent asynchronous batch processing, 24-hour batch queues provide a flat 50% discount across all tokens (costing $0.0165 for input, $0.0825 for output).
At an average human reading speed of 250 words per minute, 5,000 words takes approximately 20 minutes to read. In contrast, Claude Opus 4.8 (OpenRouter) can process or generate this text in seconds.