Processing or generating 500,000 words (approximately 660,000 tokens) with Claude 3 Haiku ranges from $0.0165 (cached input) to $0.825 (full generation).
Quick answer
For 500,000 words, Claude 3 Haiku processes approximately 660,000 tokens. That costs $0.165 as uncached input, $0.0165 with the modeled cache discount, or $0.825 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 500,000 words as prompt context, documentation, or background knowledge.
Claude 3 Haiku drafts a complete 500,000 words article, chapter, or code module.
400,000 words input prompt + 100,000 words output reply.
| Model | Provider | Input Cost (500,000 words) | Cached Input Cost | Output Cost (500,000 words) | Context Limit |
|---|---|---|---|---|---|
| Claude 3 Haiku (Current) | anthropic | $0.165 | $0.0165 | $0.825 | 200,000 |
| GPT-5.6 Luna | openai | $0.128 | $0.0128 | $0.768 | 1,050,000 |
| GPT-5.4 mini | openai | $0.48 | $0.048 | $2.88 | 256,000 |
| GPT-5.4 nano | openai | $0.128 | $0.0128 | $0.80 | 128,000 |
| GPT-4o mini | openai | $0.096 | $0.048 | $0.384 | 128,000 |
| Claude Haiku 4.5 | anthropic | $0.66 | $0.066 | $3.30 | 1,000,000 |
For Claude 3 Haiku (claude_bpe tokenizer), 500,000 words is approximately 660,000 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 500,000 words as input costs $0.165 (or $0.0165 with prompt caching). Generating 500,000 words as output costs $0.825. 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 $0.0165). For non-urgent asynchronous batch processing, 24-hour batch queues provide a flat 50% discount across all tokens (costing $0.0825 for input, $0.4125 for output).
At an average human reading speed of 250 words per minute, 500,000 words takes approximately 2000 minutes to read. In contrast, Claude 3 Haiku can process or generate this text in seconds.