Hy3 vs Hy4 preview
Why this pair: Current and previous Tencent Hy open-weight flagship generations
Benchmark Performance
Available Benchmarks
Technical Differences
Side-by-Side Facts
| Field | Hy3 | Hy4 preview |
|---|---|---|
| Developer | Tencent | Tencent |
| Family | Hy3 | Hy4 |
| Model | Hy3 | Hy4 preview |
| Version | Hy3 | Hy4 preview |
| Lifecycle | active | preview |
| Released | Unknown | 2026-08-28 |
| Knowledge cutoff | Unknown | Unknown |
| Input modalities | Text | Text |
| Output modalities | Text | Text |
| Context window | 262,144 | 1,000,000 |
| Total parameters | 298,786,155,776 | 770,000,000,000 |
| Active parameters | 21,000,000,000 | 49,000,000,000 |
| License | apache-2.0 | apache-2.0 |
| Open weights | Yes | Yes |
| API available | Yes | No |
| Self-hostable | Yes | Yes |
| Provider access | Deepinfra (Standard), Openrouter (Standard) | Openrouter (Standard) |
| Capabilities | chat, generation, tools | chat, generation, reasoning, tools |
16 comparable fields · 10 material differences · Editorially curated pair passes the primary-source comparison gate
Hy3 Capabilities
Hy4 preview Capabilities
Internal Comparison Graph
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Primary Evidence
Sources and Freshness
Questions
Hy3 vs Hy4 preview FAQs
Is Hy3 or Hy4 preview better for coding?+
This comparison does not currently contain a protocol-matched coding benchmark for both Hy3 and Hy4 preview, so Model Markets cannot name a coding leader from pricing, context size, or capability labels alone.
Which is cheaper, Hy3 or Hy4 preview?+
Hy3 is $0.132 and Hy4 preview is $0.834 per million tokens, so Hy3 is cheaper on this metric. Hy3 is $0.528 and Hy4 preview is $2.501 per million tokens, so Hy3 is cheaper on this metric.
Which has a larger context window, Hy3 or Hy4 preview?+
Hy4 preview has the larger sourced context window. Hy3 supports 262,144 and Hy4 preview supports 1,000,000.
Which performs better in benchmarks, Hy3 or Hy4 preview?+
There is no overall benchmark winner: At least two independently verified, protocol-matched benchmarks are required for an overall winner.
Can Hy3 or Hy4 preview be self-hosted?+
Both models have the same recorded self-hosting status: supported. Hy3 is open weight; Hy4 preview is open weight.
Can Hy3 and Hy4 preview understand images?+
Hy3 is not documented with image input; Hy4 preview is not documented with image input. This reflects supported input modalities, not vision quality.
Which can generate longer answers, Hy3 or Hy4 preview?+
Neither has a larger sourced maximum output. Hy3 is — and Hy4 preview is —.
Do Hy3 and Hy4 preview support reasoning and tool use?+
Hy3: tool calling. Hy4 preview: reasoning and tool calling. Feature support does not establish relative quality.
Which is available from more inference providers, Hy3 or Hy4 preview?+
Hy3 has 2 sourced provider routes; Hy4 preview has 1, so Hy3 has broader tracked availability.
Which offers better value, Hy3 or Hy4 preview?+
There is no universal value winner. Compare the input and output prices above with the matched benchmark result for your workload: cheaper tokens can be offset by different quality, token usage, latency, or provider availability.