Claude Opus 4.8 vs Claude Opus 5 — Side-by-side pricing
Side-by-side API pricing and tokenizer details for Claude Opus 4.8 (Anthropic) and Claude Opus 5 (Anthropic).
Side-by-side pricing
| Feature | Claude Opus 4.8 | Claude Opus 5 |
|---|---|---|
| Provider | Anthropic | Anthropic |
| Input (per 1M tokens) | $5.00 | $5.00 |
| Output (per 1M tokens) | $25.00 | $25.00 |
| Context caching | Yes — 90% off cached tokens | Yes — 90% off cached tokens |
| Batch API discount | 50% off | 50% off |
| Context window | 1M tokens | 1M tokens |
| Tokenizer | Anthropic tokenizer (Opus 4.7+) | Anthropic tokenizer (Opus 4.7+) |
Real-world cost example
1,000 API requests per month, each with 500 input tokens and 200 output tokens (500K input + 200K output total).
Claude Opus 4.8
$7.5000
Input: $2.5000 +Output: $5.0000
Claude Opus 5
$7.5000
Input: $2.5000 +Output: $5.0000
Frequently asked questions
Both models cost the same for this workload ($7.5000).
Claude Opus 4.8 supports a 1M token context window. Claude Opus 5 supports a 1M token context window. A larger context window lets you include more text — documents, conversation history, or code — in a single API call.
Claude Opus 4.8 supports context caching (90% off repeated tokens). It offers a 50% Batch API discount. Claude Opus 5 supports context caching (90% off repeated tokens). It offers a 50% Batch API discount.
Yes, both Claude Opus 4.8 and Claude Opus 5 use the Anthropic tokenizer (Opus 4.7+). The same text produces identical token counts on both models, so any cost difference is purely due to the rate each provider charges per token.
Claude Opus 4.8 (Anthropic): $5 input / $25 output per 1M tokens. Claude Opus 5 (Anthropic): $5 input / $25 output per 1M tokens. Rates shown before caching or batch discounts.
Both models cost the same for an 80% output / 20% input workload: $21.0000 per 1M total tokens. For your exact ratio, paste a real prompt into the calculator above.
Claude Opus 4.8 has a 1M-token context window — approximately 750K words or ~3K pages of standard text. Claude Opus 5 has a 1M-token context window — approximately 750K words or ~3K pages. (Estimates assume ~0.75 words per token.)
Calculate costs for your actual prompt
Paste your prompt into the calculator and get exact token counts using each model's real tokenizer — all in your browser.
Open calculator