LlamaIndex benchmarks Fable 5.1 on ParseBench: beats Fable 5 across the board on document OCR
llama_index · x · 2026-09-03
Fable 5.1 shipped without document OCR benchmarks, so LlamaIndex evaluated it on ParseBench, their parsing benchmark of 2,000+ real-world documents across finance, legal, and insurance.
Key findings:
- Fable 5.1 beats Fable 5 on every metric — tables, content faithfulness, formatting, charts, visual grounding — a rare genuine generational improvement in document parsing;
- It is among the best models available for table parsing;
- The author notes frontier models have advanced rapidly on reasoning benchmarks but stagnated on visual understanding (Opus 5, 5.6-Sol, 3.7 Flash); Fable 5.1 breaks that trend.
Caveat: Fable 5.1 alone isn't a production document-OCR tool and lacks needed supporting capabilities.
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