Opus 5 is 14% Cheaper Than Fable 5 but Generates 2.5x Tokens

Benchmark tests on EyeBench-V3 show that Opus 5 is 14% cheaper to run than Fable 5. However, Opus 5 generates 2.5 times more tokens, causing the overall costs of the two models to converge.

2026-07-25 ~ 2026-07-25 · 2 related posts

• Opus 5 ran about 14% cheaper than Fable 5 on EyeBench-V3, despite using 2.5× more output tokens — adonis_singh · 2026-07-25
• Opus vs Fable Cost Dynamics: Verbose Output Closes the Gap — adonis_singh · 2026-07-25