Grok 4.20 Claims Lowest Hallucination Rate Ever Recorded, Tops Instruction Following Benchmarks

xAI's latest model posts remarkable numbers on hallucination, instruction following, and agentic tool use — and Elon Musk is making sure everyone knows it.

xAI pushed Grok 4.20 out of beta with benchmark numbers that, if independently verified, represent a meaningful step in model reliability. As @XFreeze detailed, the model ranks first in lowest hallucination rate ever recorded on tracked benchmarks, first in instruction following at 83%, and second in agentic tool use at 97%. Elon Musk amplified the news with a characteristically terse post — "Grok upgrades" — as reported by @elonmusk.

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