Model Comparison
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
vs. Grok 4.6 (high)
Comparing 2 AI models · 0 benchmarks · Anthropic, SpaceXAI
Recommended Pick
Strongest on: Value, Input price, Output price
Best Value
Grok 4.6 (high)
100.0 value score
60.9 reasoning / $3.00/1M
Lowest Price
Grok 4.6 (high)
$2.00/1M input price
Best Reasoning
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
64.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
80.7 coding index
Differences That Matter
Best value
Grok 4.6 (high) has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Grok 4.6 (high) is 5.0x cheaper on input tokens than Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback).
Speed gap
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) generates about 1.1x as many tokens per second as Grok 4.6 (high).
Reasoning gap
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) leads Grok 4.6 (high) by 3.9 points on reasoning.
Coding gap
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) leads Grok 4.6 (high) by 3.9 points on coding.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
Anthropic
TTFT
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Grok 4.6 (high)
SpaceXAI
TTFT
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Which answer was more useful?
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Full Comparison
| Metric | An Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) | Top Pick Sp Grok 4.6 (high) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $10.00/1M | $2.00/1M |
| Output Cost | $50.00/1M | $6.00/1M |
| Blended (3:1) | $20.00/1M | $3.00/1M |
| Specifications | ||
| Organization | Anthropic | SpaceXAI |
| Release Date | Sep 1, 2026 | Aug 12, 2026 |
| Performance & Speed | ||
| Throughput | 60.3 tok/s | 53.3 tok/s |
| TTFT | 164560ms | 42000ms |
| Latency | 164560ms | 42000ms |
| Composite Indices | ||
| Value Score | 16.0 | 100.0 |
| Reasoning Score | 64.8 | 60.9 |
| Intelligence | 64.8 | 60.9 |
| Coding | 80.7 | 76.8 |
Key Takeaways
Grok 4.6 (high) offers the best value at $2.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) has the strongest reasoning profile with a 64.8 reasoning score,combining the available reasoning-heavy benchmarks.
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback) reaches a 80.7 coding index,making it the top choice for software development and code generation tasks.
All models support context windows of ∞+ tokens,suitable for processing lengthy documents and maintaining extended conversations.
When to Choose Each Model
Claude Fable 5.1 (Adaptive Reasoning, Xhigh Effort, Default Fallback)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Grok 4.6 (high)
- Cost-sensitive applications
- High-volume processing
