Muse Spark 1.3 Contributor vs Grok Build 0.1

Muse Spark 1.3 Contributor vs Grok Build 0.1: which AI model is cheaper, has the larger context window and more capabilities? Side-by-side comparison updated daily.

Quick verdict

  • Muse Spark 1.3 Contributor is 10× cheaper than Grok Build 0.1 for the same mix of input and output tokens.
  • Muse Spark 1.3 Contributor has the larger context window (1M), useful for long documents and big codebases.
  • Muse Spark 1.3 Contributor is the more recent release (Sep 2, 2026).
  • Choose Muse Spark 1.3 Contributor if cost matters most; choose Grok Build 0.1 if you need its specific strengths above. For the best results, test both on your own prompts.
Muse Spark 1.3 ContributorGrok Build 0.1
CompanyMetaxAI
ReleasedSep 2, 2026 ●May 20, 2026
Input (per 1M tokens)$0.10 ●$1
Output (per 1M tokens)$0.20 ●$2
Cost for 1M input + 1M output tokens$0.30 ●$3.00
Providers14 ●
Context1M ●256K
Max output944K ●225K
InputsText, Image, Video, Files ●Text, Image, Files
OutputsTextText
Reasoning✓✓
Tool use✓✓
Structured output✓✓
Open weights——

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