Models/xAI / Grok/Grok 4.20 Reasoning

Grok 4.20 Reasoning

xAI / Grok 🧠 Language Model

Reasoning-mode variant of Grok 4.20. Slower but stronger on multi-step problems.

Specifications

ModalitiesInput: text  ·  Output: text
Context window1000K tokens
Max output8K tokens
Speed●●○○○ Relaxed
FeaturesTools: No Streaming: Yes Vision: No
Capabilitieschat, reasoning

Pricing

$2.19 / 1M input tokens  ·  $4.38 / 1M output tokens

Platform credit pricing — live rates on the Models page.

Use Grok 4.20 Reasoning on Zubnet →

More from xAI / Grok

G
Grok TTS
xAI's expressive text-to-speech — 26 multilingual voices with inline speech tags for tone, pauses, whispers and laughter. 20+ languages with auto-detection.
🔊 Text-to-Speech
G
Grok 4.5
xAI's newest flagship, launched July 2026. 500K context, strongest reasoning + coding, trained alongside Cursor.
🧠 Language Model
G
Grok 4.3
xAI's flagship general-purpose model. 1M context, balanced reasoning and chat.
🧠 Language Model
G
Grok 4.20 Multi-Agent
Multi-agent orchestration variant of Grok 4.20. 1M context, suited to plan-and-execute flows.
🧠 Language Model