GPT-5.4 vs Tencent Hy3 Preview
GPT-5.4 (2026) and Tencent Hy3 Preview (2026) are frontier-tier reasoning models from OpenAI and Tencent AI Lab. GPT-5.4 ships a not-yet-sourced context window, while Tencent Hy3 Preview ships a 262K-token context window. This comparison covers specs, pricing, capabilities, benchmarks, provider availability, and production fit. It focuses on practical selection signals rather than broad model-family marketing. The goal is to make the tradeoff clear before deeper testing.
Tencent Hy3 Preview is safer overall; choose GPT-5.4 when coding workflow support matters.
Specs
| Released | 2026-03-05 | 2026-04-22 |
| Context window | — | 262K |
| Parameters | — | 295B |
| Architecture | decoder only | dense moe hybrid |
| License | Proprietary | Proprietary |
| Knowledge cutoff | 2025-08 | - |
Pricing and availability
| GPT-5.4 | Tencent Hy3 Preview | |
|---|---|---|
| Input price | $2.5/1M tokens | - |
| Output price | $15/1M tokens | - |
| Providers |
Capabilities
| GPT-5.4 | Tencent Hy3 Preview | |
|---|---|---|
| Vision | ||
| Multimodal | ||
| Reasoning | ||
| Function calling | ||
| Tool use | ||
| Structured outputs | ||
| Code execution |
Benchmarks
No shared benchmark rows are currently sourced for this pair.
Deep dive
The capability footprint differs most on multimodal input: GPT-5.4, structured outputs: GPT-5.4, and code execution: GPT-5.4. Both models share reasoning mode, function calling, and tool use, so the practical split is not just feature count. Use those differences to decide whether the page is about raw model quality, agentic coding support, multimodal ingestion, or predictable structured API behavior.
Pricing coverage is uneven: GPT-5.4 has $2.5/1M input tokens and Tencent Hy3 Preview has no token price sourced yet. Provider availability is 2 tracked routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose GPT-5.4 when coding workflow support and broader provider choice are central to the workload. Choose Tencent Hy3 Preview when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship. This keeps the decision grounded in measurable tradeoffs instead of brand-level assumptions. It also helps separate model capability from provider packaging, which can change cost and latency. For teams standardizing a stack, that distinction is often the difference between a benchmark win and a reliable deployment.
FAQ
Is GPT-5.4 or Tencent Hy3 Preview open source?
GPT-5.4 is listed under Proprietary. Tencent Hy3 Preview is listed under Proprietary. License labels affect whether you can self-host, redistribute weights, or rely only on hosted APIs, so confirm the upstream license before deployment.
Which is better for multimodal input, GPT-5.4 or Tencent Hy3 Preview?
GPT-5.4 has the clearer documented multimodal input signal in this comparison. If multimodal input is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for reasoning mode, GPT-5.4 or Tencent Hy3 Preview?
Both GPT-5.4 and Tencent Hy3 Preview expose reasoning mode. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for function calling, GPT-5.4 or Tencent Hy3 Preview?
Both GPT-5.4 and Tencent Hy3 Preview expose function calling. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for tool use, GPT-5.4 or Tencent Hy3 Preview?
Both GPT-5.4 and Tencent Hy3 Preview expose tool use. The better choice depends on benchmark fit, context budget, pricing, and whether your provider route exposes the same capability surface. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Where can I run GPT-5.4 and Tencent Hy3 Preview?
GPT-5.4 is available on OpenAI API and OpenRouter. Tencent Hy3 Preview is available on OpenRouter. Provider coverage can affect latency, region availability, compliance posture, and fallback options. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Continue comparing
Last reviewed: 2026-04-27. Data sourced from public model cards and provider documentation.