Sonnet 5 costs 27% more than Opus 4.8 — absurd pricing

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Alex Getman @alexgetmancom · 1 Jul 2026, 16:16 UTC

Prices & limits

Sonnet 5 looks absurdly priced

Opus 4.8 Max - $1.80
Sonnet 5 Max - $2.29
Fable 5 - $2.75

Sonnet 5 is about 27% more expensive than Opus 4.8.

Why does the lower-tier model cost more than the flagship?

Chart comparing cost per Intelligence Index Task for Claude Opus 4.8, Sonnet 5, and Fable 5, showing Sonnet 5 at $2.29, more expensive than Opus 4.8 at $1.80 and cheaper than Fable 5 at $2.75.

Fable 5 Anthropic Claude

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Analysis