Hy3 preview vs Hy4 preview
Hy3 preview costs 4.2x less per output token than Hy4 preview ($0.60 vs $2.501 per million). Updated October 22, 2026; 3 benchmarks have a result for both.
Hy3 preview or Hy4 preview: which to pick
Only Hy4 preview has a coding score, 44.3 on the Vibe Coding Index; Hy3 preview has none, so the two cannot be ranked on coding.
Pick Hy3 preview for output tokens 4.2x cheaper ($0.60 vs $2.501 per million).
- Shared results
- 3
- Hy3 preview only
- 33
- Hy4 preview only
- 21
- Like-for-like categories
- 1 of 9
Only benchmarks that tested both models count toward a pick; a result only one model has is shown but not compared.
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, six public coding benchmarks
No call
Only Hy4 preview has a coding score, so no call is made.
One side not measured
Intelligence
AA Intelligence Index
No call
Only Hy3 preview has a AA Intelligence Index result, 25.3.
Directional only
Agentic work
AA Agentic Index
No call
Only Hy3 preview has a AA Agentic Index result, 24.1.
Directional only
General
Vals Index
No call
Only Hy4 preview has a Vals Index result, 53.2%.
Directional only
Long documents
Listed context window
Hy4 preview
Hy4 preview takes 1.05M tokens against 262K.
Listed by OpenRouter
Everyday cost
1K input + 500 output tokens
Hy3 preview
Hy3 preview $0.0005, Hy4 preview $0.0021 per turn.
List prices
At a glance
- Coding index
- Hy3 preview not benchmarked, Hy4 preview 44.3 from 3 benchmarks.
- Widest category
- Coding, 40.6 points apart on average over 3 shared benchmarks.
- Widest single gap
- LMArena WebDev: React: Hy3 preview 1349 against Hy4 preview 1653, 41.9 points apart on a 0 to 100 scale.
- Output price
- Hy3 preview $0.60 against Hy4 preview $2.501 per million output tokens, 4.2x apart.
- Context window
- Hy3 preview takes 262K tokens, Hy4 preview 1.05M.
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 | Hy3 preview | Bars | Hy4 preview | Ties |
|---|---|---|---|---|
| Coding | 0 | 3 | ||
| All shared boards | 0 | 3 |
CodingLike-for-likeSix of these boards feed the Vibe Coding Index03
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| LMArena WebDev | 1357 | 1631 | Hy4 preview |
| AA Coding Index | 58.8 | Not measured | Only Hy3 preview measured |
| Terminal-Bench 4 (Vals AI) | Not measured | 8.1% | Only Hy4 preview measured |
| Vibe Code Bench (Vals AI) | Not measured | 77.5% | Only Hy4 preview measured |
| Code migration (Vals AI) | Not measured | 47.4% | Only Hy4 preview measured |
| ProgramBench (Vals AI) | Not measured | 0.0% | Only Hy4 preview measured |
| IOI (Vals AI) | Not measured | 59.3% | Only Hy4 preview measured |
| Terminal-Bench 2.1 (Vals AI) | Not measured | 55.1% | Only Hy4 preview measured |
| CyberBench (Vals AI) | Not measured | 65.4% | Only Hy4 preview measured |
| Terminal-Bench Hard (Artificial Analysis run) | 34.1% | Not measured | Only Hy3 preview measured |
| LMArena Text: coding | 1421 | Not measured | Only Hy3 preview measured |
| LMArena Text: software and IT | 1423 | Not measured | Only Hy3 preview measured |
| LMArena WebDev: React | 1349 | 1653 | Hy4 preview |
| LMArena WebDev: HTML | 1356 | 1620 | Hy4 preview |
| Neither model has a result on the other 25 boards here | |||
IntelligenceDirectional onlyPublic boards, shown as published, kept out of the index1 board, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| AA Intelligence Index | 25.3 | Not measured | Only Hy3 preview measured |
| Neither model has a result on the other 1 board here | |||
Agentic workDirectional onlyPublic boards, shown as published, kept out of the index10 boards, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| AA Agentic Index | 24.1 | Not measured | Only Hy3 preview measured |
| SREBench (Vals AI) | Not measured | 2.3% | Only Hy4 preview measured |
| Finance Agent (Vals AI) | Not measured | 55.1% | Only Hy4 preview measured |
| Tax Agent Bench (Vals AI) | Not measured | 32.6% | Only Hy4 preview measured |
| Legal Research Bench (Vals AI) | Not measured | 45.2% | Only Hy4 preview measured |
| Harvey's Legal Agent Benchmark (Vals AI) | Not measured | 8.8% | Only Hy4 preview measured |
| Excel Modeling Benchmark (Vals AI) | Not measured | 58.1% | Only Hy4 preview measured |
| BioMysteryBench (Vals AI) | Not measured | 69.3% | Only Hy4 preview measured |
| Terminal-Bench-Science (Vals AI) | Not measured | 1.4% | Only Hy4 preview measured |
| τ²-Bench Telecom | 92.7% | Not measured | Only Hy3 preview measured |
| Neither model has a result on the other 31 boards here | |||
ReasoningDirectional onlyPublic boards, shown as published, kept out of the index5 boards, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| GPQA Diamond (Artificial Analysis run) | 86.7% | Not measured | Only Hy3 preview measured |
| Humanity's Last Exam (Artificial Analysis run) | 27.8% | Not measured | Only Hy3 preview measured |
| LMArena Text: hard prompts | 1413 | Not measured | Only Hy3 preview measured |
| LMArena Text: expert | 1422 | Not measured | Only Hy3 preview measured |
| LMArena Text: hard prompts in English | 1416 | Not measured | Only Hy3 preview measured |
| Neither model has a result on the other 17 boards here | |||
MathDirectional onlyPublic boards, shown as published, kept out of the index3 boards, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| ProofBench | Not measured | 75.0% | Only Hy4 preview measured |
| LMArena Text: math | 1424 | Not measured | Only Hy3 preview measured |
| LMArena Text: mathematical work | 1442 | Not measured | Only Hy3 preview measured |
| Neither model has a result on the other 10 boards here | |||
KnowledgeDirectional onlyPublic boards, shown as published, kept out of the index6 boards, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| LegalBench (Vals AI) | Not measured | 83.8% | Only Hy4 preview measured |
| MedCode (Vals AI) | Not measured | 43.3% | Only Hy4 preview measured |
| LMArena Text: science | 1416 | Not measured | Only Hy3 preview measured |
| LMArena Text: medicine and healthcare | 1405 | Not measured | Only Hy3 preview measured |
| LMArena Text: legal and government | 1430 | Not measured | Only Hy3 preview measured |
| LMArena Text: business and finance | 1397 | Not measured | Only Hy3 preview measured |
| Neither model has a result on the other 12 boards here | |||
Web designNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| Neither model has a result on 9 boards here | |||
GeneralDirectional onlyPublic boards, shown as published, kept out of the index18 boards, none shared
| Benchmark | Hy3 preview | Hy4 preview | Leader |
|---|---|---|---|
| Vals Index | Not measured | 53.2% | Only Hy4 preview measured |
| Public Benefits Bench (Vals AI) | Not measured | 68.6% | Only Hy4 preview measured |
| MedScribe (Vals AI) | Not measured | 83.6% | Only Hy4 preview measured |
| IFBench | 63.1% | Not measured | Only Hy3 preview measured |
| Long context reasoning (AA-LCR) | 64.7% | Not measured | Only Hy3 preview measured |
| LMArena Text | 1401 | Not measured | Only Hy3 preview measured |
| LMArena Text: instruction following | 1383 | Not measured | Only Hy3 preview measured |
| LMArena Text: creative writing | 1339 | Not measured | Only Hy3 preview measured |
| LMArena Text: English | 1409 | Not measured | Only Hy3 preview measured |
| LMArena Text: non-English | 1390 | Not measured | Only Hy3 preview measured |
| LMArena Text: Chinese | 1435 | Not measured | Only Hy3 preview measured |
| LMArena Text: French | 1425 | Not measured | Only Hy3 preview measured |
| LMArena Text: Spanish | 1399 | Not measured | Only Hy3 preview measured |
| LMArena Text: Russian | 1399 | Not measured | Only Hy3 preview measured |
| LMArena Text: multi-turn | 1411 | Not measured | Only Hy3 preview measured |
| LMArena Text: longer queries | 1402 | Not measured | Only Hy3 preview measured |
| LMArena Text: writing and language | 1370 | Not measured | Only Hy3 preview measured |
| LMArena Text: entertainment and media | 1352 | Not measured | Only Hy3 preview measured |
| Neither model has a result on the other 28 boards here | |||
Image generationNot comparablePublic boards, shown as published, kept out of the index0 boards, none shared
| Benchmark | Hy3 preview | Hy4 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 | Tencent Hy3 preview | Tencent Hy4 preview |
|---|---|---|
| Maker | Tencent | Tencent |
| Weights | Open weights | Open weights |
| Released | April 22, 2026 | August 28, 2026 |
| Context window | 262K | 1.05M |
| Input $/Mtok | $0.18 | $0.834 |
| Output $/Mtok | $0.60 | $2.501 |
| Coding index | Not benchmarked | 44.3 |
| Independent measurements behind it | 1 | 3 |
| Cost per solved task | Not computable | Not computable |
| Source | OpenRouter listing | OpenRouter listing |
Questions
Is Hy3 preview better than Hy4 preview for coding?
Only Hy4 preview has a coding score, 44.3 on the Vibe Coding Index; Hy3 preview has none, so the two cannot be ranked on coding. Pick Hy3 preview for output tokens 4.2x cheaper ($0.60 vs $2.501 per million).
Which is cheaper, Hy3 preview or Hy4 preview?
Hy3 preview costs $0.18 per million input tokens and $0.60 per million output tokens; Hy4 preview costs $0.834 and $2.501. Cost per solved task is known for neither of them.
Which has the bigger context window, Hy3 preview or Hy4 preview?
Hy4 preview, with 1.05M tokens against 262K.
How many benchmarks is the Hy3 preview vs Hy4 preview comparison based on?
3 benchmarks have a result for both models as of October 22, 2026. Hy3 preview's coding index rests on 1 independent benchmark and Hy4 preview's on 3. Where only one model has a result, the page says so instead of naming a winner.