Hunyuan Hy3 Preview vs Llama 3.3 Nemotron Super 49B v1
Hunyuan Hy3 Preview (2026) and Llama 3.3 Nemotron Super 49B v1 (2025) are frontier reasoning models from Tencent AI Lab and NVIDIA AI. Hunyuan Hy3 Preview ships a 256K-token context window, while Llama 3.3 Nemotron Super 49B v1 ships a 128K-token context window. On LMArena Text Arena - Creative Writing, Hunyuan Hy3 Preview leads by 52 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
Hunyuan Hy3 Preview is safer overall; choose Llama 3.3 Nemotron Super 49B v1 when provider fit matters.
Decision scorecard
Local evidence first| Signal | Hunyuan Hy3 Preview | Llama 3.3 Nemotron Super 49B v1 |
|---|---|---|
| Best for | reasoning-heavy apps, tool-calling agents, and provider-routed production | general production evaluation |
| Decision fit | Coding, RAG, and Agents | Long context |
| Context window | 256K | 128K |
| Cheapest output | $0.26/1M tokens | - |
| Provider routes | 2 tracked | 1 tracked |
| Shared benchmarks | LMArena Text Arena - Creative Writing leader | 1 shared |
Decision tradeoffs
- Hunyuan Hy3 Preview holds a shared-benchmark lead on LMArena Text Arena - Creative Writing, ahead by 52 points.
- Hunyuan Hy3 Preview has the larger context window for long prompts, retrieval packs, or transcript analysis.
- Hunyuan Hy3 Preview has broader tracked provider coverage for fallback and route flexibility.
- Hunyuan Hy3 Preview uniquely exposes Reasoning and JSON / Tool use in local model data.
- Local decision data tags Hunyuan Hy3 Preview for Coding, RAG, and Agents.
- Local decision data tags Llama 3.3 Nemotron Super 49B v1 for Long context.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
Hunyuan Hy3 Preview
$118
Cheapest tracked route/tier: Tencent Cloud TI Platform
Llama 3.3 Nemotron Super 49B v1
Unavailable
No complete token price in local provider data
Cost delta unavailable until both models have sourced input and output token prices.
Switch friction
- No overlapping tracked provider route is sourced for Hunyuan Hy3 Preview and Llama 3.3 Nemotron Super 49B v1; plan for SDK, billing, or endpoint changes.
- Check replacement coverage for Reasoning and JSON / Tool use before moving production traffic.
- No overlapping tracked provider route is sourced for Llama 3.3 Nemotron Super 49B v1 and Hunyuan Hy3 Preview; plan for SDK, billing, or endpoint changes.
- Hunyuan Hy3 Preview adds Reasoning and JSON / Tool use in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-04-22 | 2025-06-01 |
| Context window | 256K | 128K |
| Parameters | 295B | 49B |
| Architecture | Dense + MoE Hybrid | Decoder Only |
| License | Tencent Hunyuan Community License | NVIDIA Open Model |
| Openness | Open weights | Open weights |
| Weights | Available | Unknown |
| Code | Unknown | Unknown |
| Commercial use | Restricted | Permitted |
| Knowledge cutoff | - | - |
Pricing and availability
| Pricing attribute | Hunyuan Hy3 Preview | Llama 3.3 Nemotron Super 49B v1 |
|---|---|---|
| Input price | $0.07/1M tokens | - |
| Output price | $0.26/1M tokens | - |
| Providers |
Capabilities
| Capability | Hunyuan Hy3 Preview | Llama 3.3 Nemotron Super 49B v1 |
|---|---|---|
| Vision | No | No |
| Multimodal | No | No |
| Reasoning | Yes | No |
| JSON / Tool use | Yes | No |
| Structured outputs | No | No |
| Code execution | No | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | Hunyuan Hy3 Preview | Llama 3.3 Nemotron Super 49B v1 |
|---|---|---|
| LMArena Text Arena - Creative Writing | 1340.0 | 1288.0 |
Deep dive
On shared benchmark coverage, LMArena Text Arena - Creative Writing has Hunyuan Hy3 Preview at 1340 and Llama 3.3 Nemotron Super 49B v1 at 1288, with Hunyuan Hy3 Preview ahead by 52 points. The largest visible gap is 52 points on LMArena Text Arena - Creative Writing, which matters most when that benchmark mirrors your workload. Treat isolated benchmark wins as directional, because provider routing, prompt style, and tool access can move real application results.
The capability footprint differs most on reasoning mode: Hunyuan Hy3 Preview, JSON / Tool use: Hunyuan Hy3 Preview, and JSON / Tool use: Hunyuan Hy3 Preview. Both models share the core language-model surface, 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: Hunyuan Hy3 Preview has $0.07/1M input tokens and Llama 3.3 Nemotron Super 49B v1 has no token price listed. Provider availability is 2 listed routes versus 1. Treat unknown pricing as an integration gap, then verify the route you will actually call before estimating production spend.
Choose Hunyuan Hy3 Preview when reasoning depth, larger context windows, and broader provider choice are central to the workload. Choose Llama 3.3 Nemotron Super 49B v1 when provider fit are more important. For production, rerun your own prompts through the exact provider, region, and tool stack you plan to ship.
FAQ
Which has a larger context window, Hunyuan Hy3 Preview or Llama 3.3 Nemotron Super 49B v1?
Hunyuan Hy3 Preview supports 256K tokens, while Llama 3.3 Nemotron Super 49B v1 supports 128K tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Is Hunyuan Hy3 Preview or Llama 3.3 Nemotron Super 49B v1 open source?
Hunyuan Hy3 Preview is listed under Tencent Hunyuan Community License. Llama 3.3 Nemotron Super 49B v1 is listed under NVIDIA Open Model. 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, Hunyuan Hy3 Preview or Llama 3.3 Nemotron Super 49B v1?
Hunyuan Hy3 Preview has the clearer documented reasoning mode signal in this comparison. If reasoning mode is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for JSON / Tool use, Hunyuan Hy3 Preview or Llama 3.3 Nemotron Super 49B v1?
Hunyuan Hy3 Preview has the clearer documented JSON / Tool use signal in this comparison. If JSON / Tool use is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ.
Which is better for JSON / Tool use, Hunyuan Hy3 Preview or Llama 3.3 Nemotron Super 49B v1?
Hunyuan Hy3 Preview has the clearer documented JSON / Tool use signal in this comparison. If JSON / 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 Hunyuan Hy3 Preview and Llama 3.3 Nemotron Super 49B v1?
Hunyuan Hy3 Preview is available on OpenRouter and Tencent Cloud TI Platform. Llama 3.3 Nemotron Super 49B v1 is available on NVIDIA NIM. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-10-09. Data sourced from public model cards and provider documentation.