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Daily blended price ($/1M) — recorded each day, builds into a trend over time.
Typical 3:1 output-to-input mix, per 1M tokens
Price as of 2026-05-10 · Source: xai_official_pricing
Complex reasoning, analysis, planning and multi-step problem solving where answer quality matters more than raw cost.
Grok 4.20 Reasoning is an xAI high-context model for precise reasoning and agentic tool workflows.
grok-4.20-0309-reasoning is a Reasoning model from xAI (US). HotON.ai tracks it at $1.25 per 1M input tokens and $2.50 per 1M output tokens, with a 2000K-token context window. Its composite efficiency score is 95/100 at an estimated $0.004 per successful task.
grok-4.20-0309-reasoning is tracked at $1.25 per 1M input tokens and $2.50 per 1M output tokens. A typical 3:1 output-to-input workload blends to roughly $2.19 per 1M tokens. Figures are illustrative demo data.
Complex reasoning, analysis, planning and multi-step problem solving where answer quality matters more than raw cost.
grok-4.20-0309-reasoning supports up to a 2000K-token context window — large enough for long documents and extended conversations in a single request.
Within the HotON.ai tracked set, grok-4.20-0309-reasoning is cheaper than 22% of models on input price and ranks #36 of 535 by overall efficiency.
Yes — grok-4-1-fast-reasoning is a lower-cost option at $0.50 per 1M output tokens, while still covering similar Reasoning use cases. Compare them side by side on HotON.ai.
Ready to paste into articles, papers or AI prompts — prices and date refresh with the live data.
HotON.ai — grok-4.20-0309-reasoning (xAI): $1.25/1M input, $2.50/1M output, as of 2026-05-10. https://hoton.ai/en/models/x-ai-grok-4-20-0309-reasoningPricing is real (via the TestKey catalog, updated daily). Quality (Arena Elo) is real where the model is ranked on LMArena. Efficiency is a modeled composite of real price and context.