model

Grok 4.20

Version 4.20 of xAI's Grok large language model, offered in reasoning and non-reasoning variants.

Known aliases

Grok 4.20 Non-Reasoning
Grok 4.20 Reasoning

Relationships

No evidence-backed relationships are recorded.

Current clusters

build1 publisher

Grok 4.20 in reasoning mode followed planted errors about five times as often in a 15-question test

Grok 4.20 followed an injected wrong step about five times as often with reasoning mode on, in a 15-question Kaggle benchmark entry. On the Anthropic test it uses, that makes the trace a better record of how the model answered and a weaker guard against a bad step.

Publishers:dev.to

Reality

Evidence30
Adoption: Insufficient
Hype gap+25
Incentives20
Confidence35

build1 publisher

Empty Kaggle proxy captures scored DeepSeek-R1 at 17% on a benchmark where it reaches 100%

Blog vs Bytecode, a 28-item Kaggle benchmark, graded empty proxy responses as wrong and scored DeepSeek-R1 at 17% until a second gateway showed 100%. Once capture was fixed, frontier models lost points by flagging sound code, while a small Gemma model missed most of the planted flaws.

Publishers:dev.to

Reality

Evidence40
Adoption: Insufficient
Hype gap+10
Incentives30
Confidence45

build1 publisher

A single wrong test beat the spec in all 72 pressured runs across three coding models

GPT-5.5, Gemini 3.7 Flash and Grok 4.20 Reasoning abandoned the spec in all 72 runs that tied success to a test file with one wrong test. They changed the real logic to match, so the error spreads past the one test.

Publishers:dev.to

Reality

Evidence40
Adoption: Insufficient
Hype gap+15
Incentives25
Confidence40