Claude Fable 5.1 vs Grok 4
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Fable 5.1 by Anthropic wins on 4 of 6 benchmarks against Grok 4 by xAI, which leads on 2. This head-to-head comparison covers coding, math, reasoning, speed, and pricing metrics from our benchmark data.
Category-by-Category Breakdown
Coding: In coding, Claude Fable 5.1 scores 1360 on Design Arena ELO compared to Grok 4's 1073, while Claude Fable 5.1 scores 1322 on Website Arena ELO compared to Grok 4's 1056.
Reasoning: In reasoning, Claude Fable 5.1 scores 90.0% on GPQA Diamond compared to Grok 4's 87.0%.
Context: In context, Claude Fable 5.1 scores 1.0M on Context Length compared to Grok 4's 256K.
Pricing Comparison
Claude Fable 5.1 costs $10.0/1M input tokens and $50.0/1M output tokens, while Grok 4 costs $3.0/1M input and $15.0/1M output. Grok 4 is the more affordable option for API usage.
Verdict
Grok 4 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Fable 5.1 vs Grok 4 — FAQ
Which is better, Claude Fable 5.1 or Grok 4?
Claude Fable 5.1 wins on more benchmarks overall (4 vs 2). However, the best choice depends on your specific needs — each model excels in different areas.
How does Claude Fable 5.1 compare to Grok 4 for coding?
SWE-bench Verified data is not available for both models. Check the detailed comparison charts above for other coding-related metrics.
Is Claude Fable 5.1 cheaper than Grok 4?
Yes, Grok 4 is cheaper. Claude Fable 5.1 costs $10.0/1M input and $50.0/1M output tokens. Grok 4 costs $3.0/1M input and $15.0/1M output tokens.
Which is faster, Claude Fable 5.1 or Grok 4?
Output speed data is not available for both models. Check the speed section of the comparison above for available performance data.
What benchmarks does the Claude Fable 5.1 vs Grok 4 comparison cover?
This comparison covers 6 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Design Arena ELO, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.