Model Comparison
Step 3.7 Flash
vs. Tri-21B-Think
Comparing 2 AI models · 7 benchmarks · StepFun, Trillion Labs
Recommended Pick
StStep 3.7 Flash10 metric winsStrongest on: Throughput, Reasoning, Intelligence
Lowest Price
Tri-21B-Think
$0.00/1M input price
Best Reasoning
Step 3.7 Flash
43.7 reasoning score
Blends available reasoning benchmarks
Best for Coding
Step 3.7 Flash
39.6 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 Step 3.7 Flash.
Reasoning gap
Step 3.7 Flash leads Tri-21B-Think by 17.5 points on reasoning.
Top-pick rationale
Step 3.7 Flash wins 10 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.
Step 3.7 Flash
StepFun
TTFT
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Time
—
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
—
Tokens
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Cost
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Which answer was more useful?
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Full Comparison
| Metric | Top Pick St Step 3.7 Flash | Tr Tri-21B-Think |
|---|---|---|
| Pricing per 1M tokens | ||
| Input Cost | $0.20/1M | $0.00/1M |
| Output Cost | $1.15/1M | $0.00/1M |
| Blended (3:1) | $0.44/1M | — |
| Specifications | ||
| Organization | StepFun | Trillion Labs |
| Release Date | May 29, 2026 | Feb 10, 2026 |
| Performance & Speed | ||
| Throughput | 389.7 tok/s | — |
| TTFT | 1053ms | — |
| Latency | 6184ms | — |
| Composite Indices | ||
| Value Score | 100.0 | — |
| Reasoning Score | 43.7 | 26.2 |
| Intelligence | 30.3 | 12.4 |
| Coding | 39.6 | — |
| Standard Benchmarks | ||
| GPQA | 80.9% | 60.1% |
| HLE | 19.9% | 6.1% |
| SciCode | 40.0% | 17.4% |
| LCR | 63.7% | 11.0% |
| IFBench | 67.3% | 54.6% |
| TAU-bench v2 | 98.5% | 81.0% |
| TerminalBench Hard | 35.6% | 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.
Step 3.7 Flash has the strongest reasoning profile with a 43.7 reasoning score,combining the available reasoning-heavy benchmarks.
Step 3.7 Flash reaches a 39.6 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
Step 3.7 Flash
- Complex reasoning tasks
- Research & analysis
- Code generation
- Software development
Tri-21B-Think
- Cost-sensitive applications
- High-volume processing
