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Grok 4.20 0309 (Reasoning)

xAIGrokProprietary

Description

Grok 4.20 Beta Reasoning is xAI's reasoning-optimized variant of the Grok 4.20 model family. Released as a beta on March 9, 2026, it uses thinking tokens for enhanced chain-of-thought reasoning, featuring a 2 million token context window for complex problem-solving tasks.

Release Date
2026-03-10
Parameters
Context Length
2.0M
Modalities
file, image, text

Capability Radar

45
general
43
coding
88
reasoning
61
scienceest.
0
agents
80
multimodal

Science uses a reasoning proxy when dedicated science benchmarks are unavailable.

Rankings

Domain#RankScoreSource
Code Ranking52
72.0
AA
General Ranking12
89.0
AA
Science32
78.0
AA

Benchmark Scores (LLM Stats)

No benchmark data available

AA Evaluation Indices

Intelligence Index
48.5
Coding Index
42.2
Tau2
1.0
Gpqa
0.9
Ifbench
0.8
Lcr
0.6
Scicode
0.4
Terminalbench Hard
0.4
Hle
0.3

LLM Stats Category Scores

Long Context
60

Pricing

Input Price$2 / 1M tokens
Output Price$6 / 1M tokens
Blended Price (3:1)$3 / 1M tokens

Speed

Tokens/sec111.4 tokens/s
Time to First Token23.51s
Time to Answer23.51s

Available Providers

(LS internal units)
ProviderInput PriceOutput Price
xAI2.0M6.0M

External Sources