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Anthropic released Claude Sonnet 5, offering near-Opus 4.8 performance at a lower price, but its new tokenizer increases token count by ~30% for English, raising effective costs—a key factor for MENA teams evaluating adoption.

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Claude Sonnet 5: Anthropic's New Model with Competitive Pricing and Tokenizer Challenges

What's New in Claude Sonnet 5

FAQ

What is Claude Sonnet 5?

It is Anthropic's latest mid-size language model, offering near-Opus 4.8 performance at lower prices with a 1M token context window.

How does Claude Sonnet 5 compare to Opus 4.8?

Sonnet 5's performance is close to Opus 4.8 but less capable in cyber tasks, allowing regulatory clearance for release.

Should MENA teams adopt Claude Sonnet 5 now?

Yes, but with caution due to the 30% effective cost increase from the new tokenizer, especially for English-heavy applications.

Source: Simon Willison (LLM & tools)

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