xAI: Grok 4.20

X-AI Developer Architecture Profile

Intelligence (ELO)1587Chatbot Arena Verified

Max Context2,000,000Tokens

API Cost / 1M$8.00Blended Prompt + Completion

Model Capabilities

Reasoning
Top Tier
Coding & Logic
Fictional

Grok 4.20 is xAI's newest flagship model with industry-leading speed and agentic tool calling capabilities. It combines the lowest hallucination rate on the market with strict prompt adherance, delivering consistently precise and truthful responses. Reasoning can be enabled/disabled using the `reasoning` `enabled` parameter in the API. [Learn more in our docs](https://openrouter.ai/docs/use-cases/reasoning-tokens#controlling-reasoning-tokens)

Granular Pricing Matrix

Input Tokens (Prompt)$2.00 / 1M

Output Tokens (Completion)$6.00 / 1M

Pricing data via OpenRouter. Sync: 3/31/2026

Evaluate Competitors

VS Engine MatchupxAI: Grok 4.20 vs Google: Lyria 3 Pro Preview VS Engine MatchupxAI: Grok 4.20 vs DeepSeek: DeepSeek V3.2 VS Engine MatchupxAI: Grok 4.20 vs xAI: Grok 4.20 Multi-Agent VS Engine MatchupxAI: Grok 4.20 vs DeepSeek: DeepSeek V3.2 Speciale VS Engine MatchupxAI: Grok 4.20 vs Anthropic: Claude Sonnet 4.6 VS Engine MatchupxAI: Grok 4.20 vs OpenAI: GPT-5.4 Nano