Current benchmark matchup
Grok 4.5 vs Claude Fable 5
Compare current scores, source confidence, price, context, capabilities, and focused Design Arena results for both models.
Grok 4.5
xAI
Vibe Coding Index
60.5
High confidence
Claude Fable 5
Anthropic
Vibe Coding Index
67.0
High confidence
Current VCI result
Claude Fable 5 leads by 6.5 VCI points.
This result follows the current published source evidence and can change when a scheduled refresh finds newer measurements.
Exact score differences
Side-by-side benchmark data
Measure
Grok 4.5
Claude Fable 5
Vibe Coding Index
60.5
67.0
Intelligence
53.8
59.9
Coding
75.0
81.3
Agentic
45.7
52.8
Blended price
$3
$22
Context window
500,000
1,000,000
Grok 4.5 evidence
100% core coverageComplete core scores supported by at least two current verified sources.
Frequency penaltyInclude reasoningLogprobsMax tokensPresence penaltyReasoningReasoning effortResponse format
Claude Fable 5 evidence
100% core coverageComplete core scores supported by at least two current verified sources.
Include reasoningMax completion tokensMax tokensReasoningReasoning effortResponse formatStopStructured outputs