Model Comparison
Solar Pro 2 (Reasoning)
vs. Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Comparing 2 AI models · 0 benchmarks · Upstage, Anthropic
Recommended Pick
AnClaude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)2 metric winsStrongest on: Reasoning, Intelligence
Lowest Price
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
$10.00/1M input price
Best Reasoning
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
65.7 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
Reasoning gap
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) leads Solar Pro 2 (Reasoning) by 56.9 points on reasoning.
Top-pick rationale
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) wins 2 measurable categories, including Reasoning, Intelligence.
Response Face-Off
Run one prompt through the selected models and compare response quality with live speed and cost context.
Solar Pro 2 (Reasoning)
Upstage
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Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
Anthropic
TTFT
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Which answer was more useful?
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OpenAI-compatible inference
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Full Comparison
| Metric | Up Solar Pro 2 (Reasoning) | Top Pick An Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | — | $10.00/1M |
| Output Cost | — | $50.00/1M |
| Blended (3:1) | — | $20.00/1M |
| Specifications | ||
| Organization | Upstage | Anthropic |
| Release Date | Jul 9, 2025 | Sep 1, 2026 |
| Performance & Speed | ||
| Throughput | — | 66.5 tok/s |
| TTFT | — | 282340ms |
| Latency | — | 282340ms |
| Composite Indices | ||
| Value Score | — | 100.0 |
| Reasoning Score | 8.8 | 65.7 |
| Intelligence | 8.8 | 65.7 |
| Coding | — | 81.6 |
Key Takeaways
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback) offers the best value at $10.00/1M,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 65.7 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 2 (Reasoning)
- General-purpose AI
- Versatile applications
Claude Fable 5.1 (Adaptive Reasoning, Max Effort, Default Fallback)
- Cost-sensitive applications
- High-volume processing
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
