Claude Fable 5.1 vs Claude Opus 4.6
Side-by-side benchmark comparison across coding, math, reasoning, speed, and pricing.
Claude Fable 5.1 by Anthropic wins on 5 of 8 benchmarks against Claude Opus 4.6 by Anthropic, 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 Claude Opus 4.6's 1289, while Claude Fable 5.1 scores 1322 on Website Arena ELO compared to Claude Opus 4.6's 1298.
Reasoning: In reasoning, Claude Fable 5.1 scores 90.0% on GPQA Diamond compared to Claude Opus 4.6's 85.3%, while Claude Fable 5.1 scores 78.0% on τ²-Bench Airline compared to Claude Opus 4.6's 75.7%.
Context: In context, both score 1.0M on Context Length.
Pricing Comparison
Claude Fable 5.1 costs $10.0/1M input tokens and $50.0/1M output tokens, while Claude Opus 4.6 costs $5.0/1M input and $25.0/1M output. Claude Opus 4.6 is the more affordable option for API usage.
Verdict
Claude Opus 4.6 leads across the board in affordability, making it the stronger overall choice in this comparison.
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Claude Fable 5.1 vs Claude Opus 4.6 — FAQ
Which is better, Claude Fable 5.1 or Claude Opus 4.6?
Claude Fable 5.1 wins on more benchmarks overall (5 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 Claude Opus 4.6 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 Claude Opus 4.6?
Yes, Claude Opus 4.6 is cheaper. Claude Fable 5.1 costs $10.0/1M input and $50.0/1M output tokens. Claude Opus 4.6 costs $5.0/1M input and $25.0/1M output tokens.
Which is faster, Claude Fable 5.1 or Claude Opus 4.6?
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 Claude Opus 4.6 comparison cover?
This comparison covers 8 benchmarks including GPQA Diamond, Input Cost, Output Cost, Context Length, Cached Input Cost, Design Arena ELO, τ²-Bench Airline, Website Arena ELO. Metrics span general intelligence, coding, math, reasoning, speed, and cost categories.