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Step 5 Preview
Hy4 preview
Hy4 preview is an open-weight model from Tencent, released Aug 28, 2026. It ranks #18 of 27 on the Vals Index with 53.21%. It costs $0.75 per million input tokens and $2.25 per million output tokens, with a 1M-token context window.
- Developer
- Tencent
- Released
- Aug 28, 2026
- Context window
- 1M
- Price in / out, per 1M tokens
- $0.75 / $2.25
- Weights
- Open · Apache 2.0
- Inputs
- Text
- Reasoning
- Yes
- Tool use
- Yes
- Hugging Face downloads, 30 days
- 17.6K
- Hugging Face likes
- 516
Benchmarks
| Benchmark | Score bar | Accuracy | Rank | Cost / test |
|---|---|---|---|---|
| Vals IndexVals AI | 53.21% | 18 / 27 | $1.45 | |
| Terminal-Bench 4.0Coding | 8.08% | 43 / 55 | $2.10 | |
| Vibe Code BenchCoding | 77.48% | 32 / 115 | $2.18 | |
| Code MigrationCoding | 45.36% | 19 / 28 | $3.58 | |
| Finance AgentFinance | 61.62% | 14 / 31 | $0.67 | |
| Finance IndexFinance | 57.51% | 13 / 31 | $0.68 | |
| Tax Agent BenchFinance | 32.62% | 18 / 76 | $0.59 | |
| Legal IndexLaw | 71.70% | 11 / 28 | $0.81 | |
| Legal Research BenchLaw | 45.19% | 20 / 85 | $0.85 | |
| MedCodeMedicine | 43.25% | 47 / 107 | $0.834 / $2.501 | |
| Terminal-Bench ScienceReasoning | 1.43% | 37 / 42 | $2.14 |
Vals AI, as of Oct 24, 2026.
LMArena, by category
| Leaderboard | Rating | Rank | Votes |
|---|---|---|---|
| WebDevLMArena | 1631 | 21 / 124 | 4.8K |
LMArena, CC BY 4.0, as of Oct 22, 2026. Where a model is rated at several effort levels, its best is shown.
Compare Hy4 preview
Tencent
Tencent’s Hunyuan family spans language, vision and 3D models. Founded 1998, based in Shenzhen. hunyuan.tencent.com
Questions
Who makes Hy4 preview?
Hy4 preview is made by Tencent, founded 1998 and based in Shenzhen.
How much does Hy4 preview cost?
$0.75 per million input tokens and $2.25 per million output tokens, at its provider’s list price.
What is Hy4 preview’s context window?
1M tokens (1,048,576).
Is Hy4 preview open source?
Hy4 preview has open weights under the Apache 2.0 license, downloadable from Hugging Face (tencent/Hy4-preview).