AI Model Comparison

Grok Build 0.1 0616 vs Claude Fable 5

Compare Grok Build 0.1 0616 vs Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback) with benchmark results, speed, pricing, and practical workflow guidance.

Best For Grok Build 0.1 0616

  • High-speed, low-latency applications
  • Cost-sensitive enterprise projects
  • High-volume token processing

Best For Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)

  • Complex reasoning and logic tasks
  • Advanced software development
  • High-accuracy research requirements

Claude Fable 5 offers superior intelligence and coding capabilities compared to Grok Build 0.1 0616. While Grok provides significant cost savings and transparent performance metrics, Claude Fable 5 is the more powerful model for complex reasoning and technical tasks.

Quick Take

This comparison evaluates xAI’s Grok Build 0.1 0616 against Anthropic’s Claude Fable 5. Claude Fable 5, released on June 9, 2026, positions itself as a high-end reasoning model, while Grok Build 0.1 0616 offers a cost-effective alternative with documented latency metrics.

Benchmark Read

Claude Fable 5 demonstrates a clear lead in core intelligence and technical benchmarks. It holds an Intelligence index of 59.9 and a Coding index of 76.5, compared to Grok’s 39.8 and 51.5, respectively. In specific evaluation metrics, Claude Fable 5 consistently outperforms Grok:

  • GPQA: 0.926 (Claude) vs. 0.895 (Grok)
  • HLE: 0.533 (Claude) vs. 0.36 (Grok)
  • SciCode: 0.602 (Claude) vs. 0.502 (Grok)
  • LCR: 0.7 (Claude) vs. 0.646 (Grok)

Claude Fable 5 also excels in specialized benchmarks, achieving a 0.985 on TAU2 and 0.628 on TerminalBench Hard, showcasing its advanced reasoning capabilities.

Cost and Speed

There is a significant disparity in pricing models. Grok Build 0.1 0616 is highly affordable, with a blended cost of $1.25/1M tokens (Input $1.00, Output $2.00). In contrast, Claude Fable 5 carries a premium price, with a blended cost of $20.00/1M tokens (Input $10.00, Output $50.00).

Regarding performance, Grok provides transparent speed data, operating at 70.253 tokens per second with a time-to-first-token of 0.405s. Performance data for Claude Fable 5 is currently unknown.

Best Fit

Grok Build 0.1 0616 is best suited for developers and enterprises requiring high-throughput, cost-sensitive applications where speed is a priority. Claude Fable 5 is the optimal choice for complex research, advanced coding, and tasks requiring the highest level of reasoning accuracy, regardless of the higher cost.

Benchmark table

Side-by-side scores, speed, and pricing for the selected models.

Metric xAI Grok Build 0.1 0616 Anthropic Claude Fable 5 (Adaptive Reasoning, Max Effort, Opus 4.8 Fallback)
Index Scores
Intelligence Index 39.8 59.9
Coding Index 51.5 76.5
Math Index--
Benchmark Scores
GPQA 89.5 92.6
SciCode 50.2 60.2
IFBench- 63.5
HLE 36.0 53.3
LCR 64.7 70.0
TAU2- 98.5
TerminalBench Hard- 62.9

Verdict

Choose Claude Fable 5 if your priority is maximum intelligence and coding proficiency, as it outperforms Grok across all shared benchmarks. However, if you are operating on a strict budget or require high-speed, low-latency performance, Grok Build 0.1 0616 is the more economical and efficient choice for high-volume tasks.

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