MODEL SIGNAL · XAI
Grok 4.20
Major 4.x update from xAI with 2M token context, lowest hallucination rate in the Grok line, 4-agent system, and 60% lower pricing than Grok 4.
CATEGORYGeneral
CONTEXT2M
RELEASEDFebruary 17, 2026
Key Features
- 4-agent coordination system
- 2M token context
- 60% cheaper than Grok 4
- Lowest hallucination rate
- Multi-agent & reasoning API variants
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The Model Signal report for Grok 4.20 is still compounding. It synthesizes automatically from Signal + Noise wire coverage and the provider announcement — check back as the wire mentions this model.