Anthropic's Claude Fable 5 costs twice as much for 5.7 percent more performance

Claude Fable 5 has achieved the top position in the AI Intelligence Index with a score of 64.9, setting records in five out of ten benchmarks. However, its performance gain over Opus 4.8 is only 5.7%, while the token price is doubled. This increased cost is partly due to safety filters requiring fallback routing. This development poses a challenge for users seeking a balance between performance and cost. Companies must consider the investment viability of Claude Fable 5 compared to other available options in the market.