xAI
Grok 4.20 is a reasoning model from xAI with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering...
---
Quality Score
1247
Arena ELO
Undisclosed
Parameters
2M
Context
Use this section to answer one simple question first: how much outside evidence do we have that this model performs well? Structured benchmark scores appear first, then official provider evidence, then live arena signal.
This model has normalized benchmark rows, so scores here are directly comparable across benchmark sources.
Sign in to join the discussion
0
Downloads
0
Likes
Mar 2026
Released
These are recent benchmark or leaderboard claims from official provider sources. They are useful for freshness and context, but they are not treated the same as normalized independent benchmark rows.
Models and Pricing | xAI Docs
Modes Agent, TTS & STT Realtime $3.00 / hour TTS $4.20 / 1M characters Read docs Try in playground Imagine API Turn ideas into reality with our image and video generation models. Use case Model Chat Grok 4.20 Coding Grok 4.20 Images Grok Imagine API Videos Grok Imagine API Voice Grok Voice API Chat API We strongly recommend all API callers use grok-4.20. Since the agent autonomously decides how many tools to call, costs scale with query complexity.
View sourceGrok 4 Model Card
benchmarks. Because our models push the frontier of AI capabilities, we are committed to mitigating Our approach to safety evaluations focuses on measuring specific safety-relevant behaviors relevant to our current evaluation methodology, results, and mitigations for these various behaviors.
View sourceGrok 4 Model Card
benchmarks. Because our models push the frontier of AI capabilities, we are committed to mitigating Our approach to safety evaluations focuses on measuring specific safety-relevant behaviors relevant to our current evaluation methodology, results, and mitigations for these various behaviors.
View source1247
ELO Score
1239 - 1255
95% Confidence
+/-8 points
8.9K
Battles
May 20, 2026
Last Updated