Model Comparison
Solar Pro 4
vs. Tri-21B-Think
Comparing 2 AI models · 7 benchmarks · Upstage, Trillion Labs
Recommended Pick
UpSolar Pro 47 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Tri-21B-Think
$0.00/1M input price
Best Reasoning
Solar Pro 4
53.3 reasoning score
Blends available reasoning benchmarks
Best for Coding
Solar Pro 4
52.7 coding index
Composite Indices
Higher is better; speed and price are normalized
Standard Benchmarks
Only benchmarks with data are shown
Differences That Matter
Price gap
Tri-21B-Think is ∞x cheaper on input tokens than Solar Pro 4.
Reasoning gap
Solar Pro 4 leads Tri-21B-Think by 27.2 points on reasoning.
Top-pick rationale
Solar Pro 4 wins 7 measurable categories, including Throughput, Reasoning, Intelligence, GPQA.
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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Tri-21B-Think
Trillion Labs
TTFT
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Time
—
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 | Tr Tri-21B-Think |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.30/1M | $0.00/1M |
| Output Cost | $1.20/1M | $0.00/1M |
| Blended (3:1) | $0.52/1M | — |
| Specifications | ||
| Organization | Upstage | Trillion Labs |
| Release Date | Aug 6, 2026 | Feb 10, 2026 |
| Performance & Speed | ||
| Throughput | 57.6 tok/s | — |
| TTFT | 1311ms | — |
| Latency | 36013ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 53.3 | 26.1 |
| Intelligence | 41.6 | 12.3 |
| Coding | 52.7 | — |
| Standard Benchmarks | ||
| GPQA | 89.1% | 60.1% |
| HLE | 29.2% | 5.9% |
| SciCode | 43.6% | 17.4% |
| LCR | 70.7% | 15.0% |
| IFBench | — | 54.6% |
| TAU-bench v2 | — | 81.0% |
| TerminalBench Hard | — | 0.8% |
Key Takeaways
Tri-21B-Think offers the best value at $0.00/1M,making it ideal for high-volume applications and cost-conscious projects.
Solar Pro 4 has the strongest reasoning profile with a 53.3 reasoning score,combining the available reasoning-heavy benchmarks.
Solar Pro 4 reaches a 52.7 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
Solar Pro 4
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Tri-21B-Think
- Cost-sensitive applications
- High-volume processing
