Step 5 Preview vs Hy3 preview
Updated October 21, 2026. 30 benchmarks have a result for both. Coding is ranked on the Vibe Coding Index; every other board is shown as published.
Decision reading
Pick Step 5 Preview for coding: it scores 71.4 on the Vibe Coding Index against 22.4 for Hy3 preview.
Pick Hy3 preview when output tokens cost 4.5x less.
- Shared results
- 30
- Step 5 Preview only
- 31
- Hy3 preview only
- 6
- Like-for-like categories
- 6 of 9
Shared results can support a head-to-head reading. Results only one model has describe coverage, not superiority.
Which one for your work
Each card is decided by one number both models carry. Where only one has it, the card says so and makes no call.
Coding
Vibe Coding Index, four public coding benchmarks
Step 5 Preview
Step 5 Preview scores 71.4 against 22.4.
2 and 1 benchmarks behind the scores
Intelligence
AA Intelligence Index
Step 5 Preview
Step 5 Preview leads, 43.7 against 25.3.
Same board, both measured
Agentic work
AA Agentic Index
No call
Only Hy3 preview has a AA Agentic Index result, 24.1.
Directional only
Long documents
Listed context window
Step 5 Preview
Step 5 Preview takes 1.05M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Hy3 preview
Step 5 Preview $0.0024, Hy3 preview $0.0005 per turn.
List prices
At a glance
- Coding index
- Step 5 Preview 71.4 from 2 benchmarks, Hy3 preview 22.4 from 1 benchmark.
- Widest category
- Coding, 24.2 points apart on average over 5 shared benchmarks.
- Widest single gap
- LMArena WebDev: React: Step 5 Preview 1583 against Hy3 preview 1349, 39.0 points apart on a 0 to 100 scale.
- Output price
- Step 5 Preview $2.70 against Hy3 preview $0.60 per million output tokens, 4.5x apart.
- Context window
- Step 5 Preview takes 1.05M tokens, Hy3 preview 262K.
Benchmark by benchmark
First the score: boards each model leads, per category, where both have a result. Then every board, a category to a fold; bars are each result on a 0 to 100 scale, so compare the two in a row, not one row with another.
| Category | Step 5 Preview | Bars | Hy3 preview | Ties |
|---|---|---|---|---|
| Coding | 5 | 0 | ||
| Intelligence | 1 | 0 | ||
| Reasoning | 4 | 0 | ||
| Math | 2 | 0 | ||
| Knowledge | 4 | 0 | ||
| General | 14 | 0 | ||
| All shared boards | 30 | 0 |
CodingLike-for-likeFour of these boards feed the Vibe Coding Index50
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| LiveBench coding | 85.6% | Not measured | Only Step 5 Preview measured |
| LMArena WebDev | 1567 | 1357 | Step 5 Preview |
| AA Coding Index | Not measured | 58.8 | Only Hy3 preview measured |
| Terminal-Bench 4 (Vals AI) | 31.8% | Not measured | Only Step 5 Preview measured |
| Vibe Code Bench (Vals AI) | 70.4% | Not measured | Only Step 5 Preview measured |
| Code migration (Vals AI) | 39.0% | Not measured | Only Step 5 Preview measured |
| IOI (Vals AI) | 38.1% | Not measured | Only Step 5 Preview measured |
| SWE-bench Multimodal (Vals AI) | 40.8% | Not measured | Only Step 5 Preview measured |
| SciCode | 58.9% | Not measured | Only Step 5 Preview measured |
| Terminal-Bench Hard (Artificial Analysis run) | Not measured | 34.1% | Only Hy3 preview measured |
| LMArena Text: coding | 1485 | 1421 | Step 5 Preview |
| LMArena Text: software and IT | 1473 | 1423 | Step 5 Preview |
| LMArena WebDev: React | 1583 | 1349 | Step 5 Preview |
| LMArena WebDev: HTML | 1556 | 1356 | Step 5 Preview |
| LMArena WebDev: from an image | 1550 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 23 boards here | |||
IntelligenceLike-for-likePublic boards, shown as published, kept out of the index10
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| AA Intelligence Index | 43.7 | 25.3 | Step 5 Preview |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index13 boards, none shared
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| AA Agentic Index | Not measured | 24.1 | Only Hy3 preview measured |
| LiveBench research | 72.8% | Not measured | Only Step 5 Preview measured |
| LiveBench browser | 24.0% | Not measured | Only Step 5 Preview measured |
| LiveBench long agentic | 27.5% | Not measured | Only Step 5 Preview measured |
| SREBench (Vals AI) | 0.4% | Not measured | Only Step 5 Preview measured |
| Finance Agent (Vals AI) | 50.7% | Not measured | Only Step 5 Preview measured |
| Tax Agent Bench (Vals AI) | 27.3% | Not measured | Only Step 5 Preview measured |
| Legal Research Bench (Vals AI) | 40.4% | Not measured | Only Step 5 Preview measured |
| Excel Modeling Benchmark (Vals AI) | 57.1% | Not measured | Only Step 5 Preview measured |
| BioMysteryBench (Vals AI) | 67.4% | Not measured | Only Step 5 Preview measured |
| Terminal-Bench-Science (Vals AI) | 2.9% | Not measured | Only Step 5 Preview measured |
| Vals Science Index | 29.6% | Not measured | Only Step 5 Preview measured |
| τ²-Bench Telecom | Not measured | 92.7% | Only Hy3 preview measured |
| Neither model has a result on the other 26 boards here | |||
ReasoningLike-for-likePublic boards, shown as published, kept out of the index40
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| LiveBench reasoning | 83.8% | Not measured | Only Step 5 Preview measured |
| MysteryMechanism (Vals AI) | 18.5% | Not measured | Only Step 5 Preview measured |
| GPQA Diamond (Artificial Analysis run) | Not measured | 86.7% | Only Hy3 preview measured |
| Humanity's Last Exam (Artificial Analysis run) | 46.5% | 27.8% | Step 5 Preview |
| LMArena Text: hard prompts | 1461 | 1413 | Step 5 Preview |
| LMArena Text: expert | 1485 | 1422 | Step 5 Preview |
| LMArena Text: hard prompts in English | 1454 | 1416 | Step 5 Preview |
| LMArena Vision: diagrams | 1308 | Not measured | Only Step 5 Preview measured |
| LMArena Vision: homework | 1265 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 12 boards here | |||
MathLike-for-likePublic boards, shown as published, kept out of the index20
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| ProofBench | 42.0% | Not measured | Only Step 5 Preview measured |
| LMArena Text: math | 1458 | 1424 | Step 5 Preview |
| LMArena Text: mathematical work | 1460 | 1442 | Step 5 Preview |
| Neither model has a result on the other 10 boards here | |||
KnowledgeLike-for-likePublic boards, shown as published, kept out of the index40
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| LMArena Text: science | 1454 | 1416 | Step 5 Preview |
| LMArena Text: medicine and healthcare | 1439 | 1405 | Step 5 Preview |
| LMArena Text: legal and government | 1437 | 1430 | Step 5 Preview |
| LMArena Text: business and finance | 1435 | 1397 | Step 5 Preview |
| Neither model has a result on the other 13 boards here | |||
Web designDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| LiveBench design | 76.9% | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 8 boards here | |||
GeneralLike-for-likePublic boards, shown as published, kept out of the index140
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| LiveBench data analysis | 63.5% | Not measured | Only Step 5 Preview measured |
| Public Benefits Bench (Vals AI) | 58.1% | Not measured | Only Step 5 Preview measured |
| IFBench | Not measured | 63.1% | Only Hy3 preview measured |
| Long context reasoning (AA-LCR) | 88.3% | 64.7% | Step 5 Preview |
| LMArena Text | 1440 | 1401 | Step 5 Preview |
| LMArena Text: instruction following | 1438 | 1383 | Step 5 Preview |
| LMArena Text: creative writing | 1409 | 1339 | Step 5 Preview |
| LMArena Vision | 1265 | Not measured | Only Step 5 Preview measured |
| LMArena Text: English | 1447 | 1409 | Step 5 Preview |
| LMArena Text: non-English | 1428 | 1390 | Step 5 Preview |
| LMArena Text: Chinese | 1500 | 1435 | Step 5 Preview |
| LMArena Text: Japanese | 1383 | Not measured | Only Step 5 Preview measured |
| LMArena Text: French | 1438 | 1425 | Step 5 Preview |
| LMArena Text: Spanish | 1441 | 1399 | Step 5 Preview |
| LMArena Text: Russian | 1433 | 1399 | Step 5 Preview |
| LMArena Text: multi-turn | 1437 | 1411 | Step 5 Preview |
| LMArena Text: longer queries | 1449 | 1402 | Step 5 Preview |
| LMArena Text: writing and language | 1425 | 1370 | Step 5 Preview |
| LMArena Text: entertainment and media | 1412 | 1352 | Step 5 Preview |
| LMArena Vision: English | 1290 | Not measured | Only Step 5 Preview measured |
| LMArena Vision: reading text | 1282 | Not measured | Only Step 5 Preview measured |
| Neither model has a result on the other 25 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Step 5 Preview | Hy3 preview | Leader |
|---|---|---|---|
| Neither model has a result on 5 boards here | |||
What each workload costs
Three fixed token mixes at each model's listed price, so per-token rates become a bill.
Chat turn
1K input + 500 output tokens
Hy3 preview costs less
Repository review
50K input + 3K output tokens
Hy3 preview costs less
Agent loop
200K input + 10K output tokens
Hy3 preview costs less
Listed OpenRouter rates, without cache or batch discounts. A workload that does not fit a model's context window would need splitting.
Specification differences
The leading value in a row is marked; a row with a missing value names no leader. Our two rows are marked in red.
| Specification | StepFun Step 5 Preview | Tencent Hy3 preview |
|---|---|---|
| Maker | StepFun | Tencent |
| Weights | Open weights | Open weights |
| Released | October 8, 2026 | April 22, 2026 |
| Context window | 1.05M | 262K |
| Input $/Mtok | $1.00 | $0.18 |
| Output $/Mtok | $2.70 | $0.60 |
| Coding index | 71.4 | 22.4 |
| Independent measurements behind it | 2 | 1 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Step 5 Preview better than Hy3 preview for coding?
Pick Step 5 Preview for coding: it scores 71.4 on the Vibe Coding Index against 22.4 for Hy3 preview. Pick Hy3 preview when output tokens cost 4.5x less.
Which is cheaper, Step 5 Preview or Hy3 preview?
Step 5 Preview costs $1.00 per million input tokens and $2.70 per million output tokens; Hy3 preview costs $0.18 and $0.60. Cost per solved task is known for neither of them.
Which has the bigger context window, Step 5 Preview or Hy3 preview?
Step 5 Preview, with 1.05M tokens against 262K.
How many benchmarks is the Step 5 Preview vs Hy3 preview comparison based on?
30 benchmarks have a result for both models as of October 21, 2026. Step 5 Preview's coding index rests on 2 independent benchmarks and Hy3 preview's on 1. Where only one model has a result, the page says so instead of naming a winner.