Tencent Hy3 Preview vs o3
Tencent Hy3 Preview (2026) and o3 (2025) are frontier-tier reasoning models from Tencent AI Lab and OpenAI. Tencent Hy3 Preview ships a 262K-token context window, while o3 ships a 128K-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 o3 when coding workflow support matters.
Specs
| Released | 2026-04-22 | 2025-03-31 |
| Context window | 262K | 128K |
| Parameters | 295B | — |
| Architecture | dense moe hybrid | decoder only |
| License | Proprietary | Unknown |
| Knowledge cutoff | - | - |
Pricing and availability
| Tencent Hy3 Preview | o3 | |
|---|---|---|
| Input price | - | $1/1M tokens |
| Output price | - | $4/1M tokens |
| Providers |
Capabilities
| Tencent Hy3 Preview | o3 | |
|---|---|---|
| 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 function calling: Tencent Hy3 Preview, tool use: Tencent Hy3 Preview, structured outputs: o3, and code execution: o3. Both models share reasoning mode, 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: Tencent Hy3 Preview has no token price sourced yet and o3 has $1/1M input tokens. Provider availability is 1 tracked routes versus 3. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Tencent Hy3 Preview when long-context analysis and larger context windows are central to the workload. Choose o3 when coding workflow support and broader provider choice 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.
FAQ
Which has a larger context window, Tencent Hy3 Preview or o3?
Tencent Hy3 Preview supports 262K tokens, while o3 supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Tencent Hy3 Preview or o3 open source?
Tencent Hy3 Preview is listed under Proprietary. o3 is listed under Unknown. 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 reasoning mode, Tencent Hy3 Preview or o3?
Both Tencent Hy3 Preview and o3 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, Tencent Hy3 Preview or o3?
Tencent Hy3 Preview has the clearer documented function calling signal in this comparison. If function calling is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for tool use, Tencent Hy3 Preview or o3?
Tencent Hy3 Preview has the clearer documented tool use signal in this comparison. If tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Where can I run Tencent Hy3 Preview and o3?
Tencent Hy3 Preview is available on OpenRouter. o3 is available on OpenAI API, OpenRouter, and OpenAI Batch API. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
Continue comparing
Last reviewed: 2026-04-27. Data sourced from public model cards and provider documentation.