Model comparison
Hy3 Preview vs Step 3.7 Flash
Head-to-head evidence from 16 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
BenchAlign evidence: Hy3 Preview not scored; Step 3.7 Flash estimated. Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. Hy3 Preview and Step 3.7 Flash share 16 comparable benchmark results. 2 of 8 categories are comparable. 6 results are unique to Hy3 Preview; 14 to Step 3.7 Flash.
Updated July 16, 2026- Shared results
- 16
- Hy3 Preview only
- 6
- Step 3.7 Flash only
- 14
- Comparable categories
- 2 / 8
Pick Step 3.7 Flash if you want the stronger benchmark profile. Hy3 Preview only becomes the better choice if coding is the priority or you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 16 shared benchmark results across 4 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
Step 3.7 Flash is clearly ahead on the provisional aggregate, 57 to 53. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Step 3.7 Flash's sharpest advantage is in agentic, where it averages 66.4 against 54.4. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 54.4% to 59.5%. Hy3 Preview does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Step 3.7 Flash is also the more expensive model on tokens at $0.20 input / $1.15 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Hy3 Preview. That is roughly Infinityx on output cost alone.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | Hy3 Preview | Δ | Step 3.7 Flash |
|---|---|---|---|
| Agentic | Hy3 Preview54.4 | Margin→ 12.0 | Step 3.7 Flash66.4 |
| Coding | Hy3 Preview57.8 | Margin← 1.5 | Step 3.7 Flash56.3 |
| Knowledge | Hy3 Preview33.8 | MarginNo overlap | Step 3.7 FlashNot measured |
| Inst. Following | Hy3 Preview63.1 | MarginNo overlap | Step 3.7 FlashNot measured |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
Terminal-Bench 2.0
AgenticA 54.4%B 59.5%Winner: Step 3.7 FlashΔ 5.1Terminal-Bench 2.0: Hy3 Preview scored 54.4%; Step 3.7 Flash scored 59.5%. Step 3.7 Flash wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | Hy3 Preview | Step 3.7 Flash | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | Hy3 Preview$0 input / $0 output | Step 3.7 Flash$0.2 input / $1.15 output | Hy3 Preview has the lower combined listed price. |
| Generation speedtokens per second | Hy3 PreviewNot available | Step 3.7 FlashNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | Hy3 PreviewNot available | Step 3.7 FlashNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | Hy3 Preview256K | Step 3.7 Flash256K | Listed context windows are equal. |
Benchmark Deep Dive
AgenticStep 3.7 Flash wins12 benchmarks
| Benchmark | Hy3 Preview | Step 3.7 Flash | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 54.4% | 59.5% | Step 3.7 Flash leads |
| Gert LabsSource | 36.91% | 51.57% | Step 3.7 Flash leads |
| AA Agentic IndexSource | 30.7% | 21.5% | Hy3 Preview leads |
| GDPval-AASource | 35.7% | 25.9% | Hy3 Preview leads |
| GDPval-AASource | 1214 | 1017 | Hy3 Preview leads |
| BrowseCompSource | — | 75.8% | Not comparable |
| DeepSearchQASource | — | 92.8% | Not comparable |
| ToolathlonSource | — | 49.5% | Not comparable |
| Claw-EvalSource | — | 67.1% | Not comparable |
| HLE w/ toolsSource | — | 47.2% | Not comparable |
| τ²-bench resultsSource | — | 98.5% | Not comparable |
| APEX-Agents-AASource | — | 14.8% | Not comparable |
CodingHy3 Preview wins7 benchmarks
| Benchmark | Hy3 Preview | Step 3.7 Flash | Result |
|---|---|---|---|
| SWE-bench VerifiedSource | 74.4% | — | Not comparable |
| Terminal-Bench 2.0Source | 54.4% | 59.5% | Step 3.7 Flash leads |
| SciCodeSource | 41.2% | — | Not comparable |
| AA-SciCodeSource | 47.6% | 40.0% | Hy3 Preview leads |
| AA Coding IndexSource | 58.8% | 39.6% | Hy3 Preview leads |
| SWE-bench ProSource | — | 56.3% | Not comparable |
| Terminal-Bench HardSource | — | 35.6% | Not comparable |
Reasoning2 benchmarks
Knowledge9 benchmarks
| Benchmark | Hy3 Preview | Step 3.7 Flash | Result |
|---|---|---|---|
| Artificial Analysis Intelligence IndexSource | 41.2% | 30.3% | Hy3 Preview leads |
| GPQASource | 87.2% | — | Not comparable |
| GPQA-DSource | 87.2% | — | Not comparable |
| HLESource | 25.5% | — | Not comparable |
| AA-Omniscience AccuracySource | 31.5% | 25.4% | Hy3 Preview leads |
| AA-Omniscience Hallucination RateSource | 73.0% | 84.4% | Hy3 Preview leads |
| AA-GPQA DiamondSource | 89.7% | 80.9% | Hy3 Preview leads |
| AA-HLESource | 31.6% | 19.9% | Hy3 Preview leads |
| AA-Omniscience IndexSource | -18.5% | -37.5% | Hy3 Preview leads |
Multimodal4 benchmarks
Frequently Asked Questions (3)
Which is better, Hy3 Preview or Step 3.7 Flash?
Step 3.7 Flash is ahead on BenchLM's provisional leaderboard, 57 to 53. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 54.4% and 59.5%.
Which is better for coding, Hy3 Preview or Step 3.7 Flash?
Hy3 Preview has the edge for coding in this comparison, averaging 57.8 versus 56.3. Inside this category, AA Coding Index is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, Hy3 Preview or Step 3.7 Flash?
Step 3.7 Flash has the edge for agentic tasks in this comparison, averaging 66.4 versus 54.4. Inside this category, GDPval-AA is the benchmark that creates the most daylight between them.
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