Expired50% confidenceFactExact time
In the e-commerce website test, Fable 5 output 588,000 tokens while Opus 4.8 output 4,898,000 tokens, making Fable 5's token usage approximately 12% of Opus 4.8's.
1
Sources
50%
Confidence
Medium-term (~90 days)
Relevance
7/2/2026
First Seen
Valid until: 9/30/2026(expired)
Sources
Fable 5 vs Opus 4.8 Real-World Showdown: Three Projects to Determine the AI Coding Champion
bilibili未来变量relaunch6/12/2026
Related Claims
UnverifiedIn the e-commerce website test, Opus 4.8 consumed 4.898 million output tokens while Fable 5 used only 588K tokens77% similarUnverifiedFable 5 scored 80.3 on the SWE Bench Pro programming test, while OpenAI's GPT 5.5 scored only 58.6.70% similarUnverifiedThe plans generated by Fable 5 during the planning phase are more than twice as long as those of the Opus 4.8 version, but testers considered them inferior to the Opus 4.8 version in terms of structure and readability.68% similarUnverifiedIn the ExploitBench test, Sol scored approximately 76%, slightly behind Fable 5's 78%, but Sol consumed only about 120,000–130,000 tokens while Fable 5 used approximately 350,000 tokens.63% similar
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