Grok 4.20

SpaceXAI's Grok 4.20 flagship release with tool calling, multimodal input support, and a 2M-token context window. Content policy rejections can still be charged: SpaceXAI may pass through a $0.05 moderation-failure fee, or a $0.055 usage-guidelines violation fee, depending on which rejection upstream returns.

  • Reasoning
  • Vision
  • Tool Calling
  • Structured Output

Added Mar 31, 2026

Pricing

Auto routing · per 1M tokens
Input
$1.25
Output
$2.50
Cache read
$0.20
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Specifications

Context window
2M
Max output
131.1K
Avg output (7d)
543 tokens
Longer than 48% of models

Benchmarks

Sourced from Artificial Analysis.

Intelligence Index

25.7

Better than 80% of models compared

Agentic work

T²-Bench Telecom (legacy)

Legacy fallback · Conversational AI agents in dual-control scenarios

93.0%

Better than 89% of models compared

Document reasoning

AA-LCR v1.1

Long context reasoning with updated grading

69.0%

Better than 60% of models compared

Reasoning

HLE

Humanity's Last Exam

34.5%

Better than 82% of models compared

IFBench

Instruction-following benchmark

81.2%

Better than 99% of models compared

Coding

Terminal-Bench Hard (legacy)

Legacy fallback · Agentic coding and terminal use

37.9%

Better than 85% of models compared

Legacy benchmarks

GPQA Diamond (legacy)

Graduate-level scientific reasoning

91.1%

Better than 91% of models compared

AA-LCR (unversioned / legacy)

Long context reasoning evaluation

69.0%

Better than 60% of models compared

Last updated Oct 11, 2026

Artificial Analysis

Providers

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