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Anthropic

Claude Fable 5

VS
xAI

Grok 4.3

✍️ Analysis by:the whichllmmodel Editorial Team|📅 Updated: June 2026

Decision Recommendation

⚖️ Editorial Verdict: In our analysis, Claude Fable 5 is the premium intelligence choice, scoring 80.3% higher on coding benchmarks. However, this accuracy premium comes with a cost overhead: Grok 4.3 is 12.8x cheaper to run and delivers 3.5x faster throughput. If you are building high-volume, simple chatbots or processing massive amounts of text where budget is critical, Grok 4.3 offers excellent cost savings. For agentic reasoning, code refactoring, or complex logical tasks, the accuracy premium of Claude Fable 5 fully justifies the cost.

Model Specs

Claude Fable 5

Benchmarks & Scores

Coding (swe-bench-pro)Winner (+)
80.3%
Reasoning (gpqa-diamond)Winner (+4.0%)
94.1%

Cost & Performance

Cost (per 1M tokens)
$20.00Input: $10.00 | Output: $50.00
Speed
60.3 tps
Context Window
1M tokens
Model Specs

Grok 4.3

Benchmarks & Scores

Coding (swe-bench-pro)
N/A
Reasoning (gpqa-diamond)
90.1%

Cost & Performance

Cost (per 1M tokens)12.8x cheaper
$1.56Input: $1.25 | Output: $2.50
Speed3.5x faster
209 tps
Context Window
1M tokens
Read our data collection methodology

Frequently Asked Questions

Grok 4.3 is cheaper than Claude Fable 5. Grok 4.3 has a blended cost of $1.56/1M tokens, which is about 12.8x cheaper than Claude Fable 5 at $20.00/1M tokens.

Grok 4.3 is faster than Claude Fable 5. Grok 4.3 generates 209 tokens per second (tps) compared to Claude Fable 5 which generates 60.3 tokens per second.

Claude Fable 5 is better for coding tasks. It scores 80.3% on coding evaluations (swe-bench-pro) compared to Grok 4.3 which scores N/A.

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