Model Comparison
Solar Pro 4
vs. Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Comparing 2 AI models · 0 benchmarks · Upstage, Anthropic
Recommended Pick
UpSolar Pro 47 metric winsStrongest on: Value, Input price, Output price
Best Value
Solar Pro 4
100.0 value score
32.7 reasoning / $0.52/1M
Lowest Price
Solar Pro 4
$0.30/1M input price
Best Reasoning
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
56.8 reasoning score
Blends available reasoning benchmarks
Best for Coding
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
81.6 coding index
Differences That Matter
Best value
Solar Pro 4 has the strongest quality-to-price mix at 100.0 out of 100 value points.
Price gap
Solar Pro 4 is 33.3x cheaper on input tokens than Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback).
Reasoning gap
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) leads Solar Pro 4 by 24.1 points on reasoning.
Coding gap
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) leads Solar Pro 4 by 28.9 points on coding.
Top-pick rationale
Solar Pro 4 wins 7 measurable categories, including Value, Input price, Output price, Blended price.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Solar Pro 4
Upstage
TTFT
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Time
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tok/s
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Tokens
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Cost
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Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Anthropic
TTFT
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Time
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tok/s
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Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick Up Solar Pro 4 | An Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.30/1M | $10.00/1M |
| Output Cost | $1.20/1M | $50.00/1M |
| Blended (3:1) | $0.52/1M | $20.00/1M |
| Specifications | ||
| Organization | Upstage | Anthropic |
| Release Date | Aug 6, 2026 | Sep 1, 2026 |
| Performance & Speed | ||
| Throughput | 70.1 tok/s | 67.1 tok/s |
| TTFT | 1980ms | 266510ms |
| Latency | 30520ms | 266510ms |
| Composite Indices | ||
| Value Score | 100.0 | 4.6 |
| Reasoning Score | 32.7 | 56.8 |
| Intelligence | 32.7 | 56.8 |
| Coding | 52.7 | 81.6 |
Key Takeaways
Solar Pro 4 offers the best value at $0.30/1M,making it ideal for high-volume applications and cost-conscious projects.
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) has the strongest reasoning profile with a 56.8 reasoning score,combining the available reasoning-heavy benchmarks.
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) reaches a 81.6 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
Solar Pro 4
- Cost-sensitive applications
- High-volume processing
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
