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Grok 4.20 1

Grok 4.20 1 is a SpaceXAI proprietary model. It is not yet ranked: 4 independent results so far, and the index needs at least five across two categories. Last measured 20 Oct 2026.

Blended price
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Output speed
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First answer
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Context
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Full answer
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Cost per run
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Released
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date not published by our sources
How it scores by categoryDashed line = average model (50). One step of 15 = one standard deviation.
  1. Reasoning65
  2. Coding64
  3. Maths63
  4. Human preference67

Versions

SpaceXAI has shipped 11 models under this name. Each is ranked on its own results; a newer version often has fewer results so far, which holds its index nearer the average until more arrive.

ModelReleasedIndexRank
Grok 4.7high21 Sept 202664.0#56
Grok 4.6medium11 Aug 202664.2#54
Grok 4.5high8 Jul 202659.3#131
Grok 4.3medium17 Apr 202658.8#143
Grok 4.2high10 Mar 2026––
Grok 4.20thinking17 Feb 202658.7#144
Grok 4.117 Nov 202557.2#180
Grok 49 Jul 202558.0#162
Grok 317 Feb 202551.5#337
Grok 212 Dec 202441.9#607
Grok 4.20 1this page–––

Benchmark results

See all LLM benchmarks. One column per reasoning effort. Rank is among every configuration of every model on that benchmark. Hover a score for the run it came from.

Reasoning

Benchmarknot statedSource
Arena Hard Prompts1487#53Arena (LMArena)

Coding

Benchmarknot statedSource
Arena Coding1508#64Arena (LMArena)

Maths

Benchmarknot statedSource
Arena Maths1448#79Arena (LMArena)

Instruction following

Benchmarknot statedSource
Arena Instruction Followingnot in index1450#66Arena (LMArena)

Human preference

Benchmarknot statedSource
Arena Text1475#39Arena (LMArena)
Arena Creative Writingnot in index1464#25Arena (LMArena)
Arena Multi-turnnot in index1483#32Arena (LMArena)
Arena Longer Queriesnot in index1466#68Arena (LMArena)

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See also

All SpaceXAI models

Data as of 21 Oct 2026. Compare with another model.

Cite as: BenchLeader, “Grok 4.20 1: benchmarks, pricing, speed and rank”, https://www.benchleader.com/models/grok-4-20-1, data as of 21 Oct 2026.