GPT-5.4 Pro vs Hunyuan Hy3 Preview
GPT-5.4 Pro (2026) and Hunyuan Hy3 Preview (2026) are frontier-tier reasoning models from OpenAI and Tencent AI Lab. GPT-5.4 Pro ships a 1.05m-token context window, while Hunyuan Hy3 Preview ships a 262k-token context window. On GeneBench-Pro, GPT-5.4 Pro leads by 15.4 pts. This comparison covers specs, pricing, API access, capabilities, benchmarks, input and output token costs, and production fit for coding and agent workloads.
GPT-5.4 Pro fits 4x more tokens; pick it for long-context work and Hunyuan Hy3 Preview for tighter calls.
Decision scorecard
Local evidence first| Signal | GPT-5.4 Pro | Hunyuan Hy3 Preview |
|---|---|---|
| Best for | reasoning-heavy apps, multimodal apps, and tool-calling agents | reasoning-heavy apps, tool-calling agents, and provider-routed production |
| Decision fit | Coding, RAG, and Agents | Coding, RAG, and Agents |
| Context window | 1.05m | 262k |
| Cheapest output | $180/1M tokens | $0.26/1M tokens |
| Provider routes | 3 tracked | 2 tracked |
| Shared benchmarks | GeneBench-Pro leader | 1 shared |
Decision tradeoffs
- GPT-5.4 Pro holds a shared-benchmark lead on GeneBench-Pro, ahead by 15.4 points.
- GPT-5.4 Pro has the larger context window for long prompts, retrieval packs, or transcript analysis.
- GPT-5.4 Pro has broader tracked provider coverage for fallback and procurement flexibility.
- GPT-5.4 Pro uniquely exposes Vision, Multimodal, and Structured outputs in local model data.
- Local decision data tags GPT-5.4 Pro for Coding, RAG, and Agents.
- Hunyuan Hy3 Preview has the lower cheapest tracked output price at $0.26/1M tokens.
- Local decision data tags Hunyuan Hy3 Preview for Coding, RAG, and Agents.
Monthly cost at traffic
Estimate token spend from the cheapest tracked input and output route or tier on this page.
GPT-5.4 Pro
$69,000
Cheapest tracked route/tier: OpenRouter
Hunyuan Hy3 Preview
$118
Cheapest tracked route/tier: OpenRouter
Estimated monthly gap: $68,882. Batch, cache, alternate speed tiers, and negotiated pricing are excluded from this local estimate.
Switch friction
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- Hunyuan Hy3 Preview is $180/1M tokens lower on cheapest tracked output pricing before cache, batch, or negotiated discounts.
- Check replacement coverage for Vision, Multimodal, and Structured outputs before moving production traffic.
- Provider overlap exists on OpenRouter; start route-level A/B tests there.
- GPT-5.4 Pro is $180/1M tokens higher on cheapest tracked output pricing, so quality gains need to justify the spend.
- GPT-5.4 Pro adds Vision, Multimodal, and Structured outputs in local capability data.
Specs
| Specification | ||
|---|---|---|
| Released | 2026-03-01 | 2026-04-22 |
| Context window | 1.05m | 262k |
| Parameters | — | 295B |
| Architecture | Decoder Only | Dense + MoE Hybrid |
| License | Proprietary | Tencent Hunyuan Community License |
| Openness | Proprietary | Open weights |
| Weights | Not released | Available |
| Code | Unknown | Unknown |
| Commercial use | Commercial use: conditional | Commercial use: conditional |
| Knowledge cutoff | 2025-08 | - |
Pricing and availability
| Pricing attribute | GPT-5.4 Pro | Hunyuan Hy3 Preview |
|---|---|---|
| Input price |
| $0.07/1M tokens |
| Output price |
| $0.26/1M tokens |
| Providers |
Capabilities
| Capability | GPT-5.4 Pro | Hunyuan Hy3 Preview |
|---|---|---|
| Vision | Yes | No |
| Multimodal | Yes | No |
| Reasoning | Yes | Yes |
| Function calling | Yes | Yes |
| Tool use | Yes | Yes |
| Structured outputs | Yes | No |
| Code execution | Yes | No |
| IDE integration | No | No |
| Computer use | No | No |
| Parallel agents | No | No |
Benchmarks
| Benchmark | GPT-5.4 Pro | Hunyuan Hy3 Preview |
|---|---|---|
| GeneBench-Pro | 16.3 | 0.9 |
Deep dive
On shared benchmark coverage, GeneBench-Pro has GPT-5.4 Pro at 16.3 and Hunyuan Hy3 Preview at 0.9, with GPT-5.4 Pro ahead by 15.4 points. The largest visible gap is 15.4 points on GeneBench-Pro, 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 vision: GPT-5.4 Pro, multimodal input: GPT-5.4 Pro, structured outputs: GPT-5.4 Pro, and code execution: GPT-5.4 Pro. 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.
For cost, GPT-5.4 Pro lists tiered pricing: 0-272,000t is $30/1M input and $180/1M output; 272,000t+ is $60/1M input and $270/1M output, while Hunyuan Hy3 Preview lists $0.07/1M input and $0.26/1M output tokens on the cheapest tracked provider. A 70/30 input-output blend puts Hunyuan Hy3 Preview lower by about $74.88 per million blended tokens. For tiered rows, this cheapest-track view can understate interactive or fast-lane spend, so compare the tier you will actually use. Availability is 3 providers versus 2, so concentration risk also matters.
Choose GPT-5.4 Pro when coding workflow support, larger context windows, and broader provider choice are central to the workload. Choose Hunyuan Hy3 Preview when provider fit and lower input-token cost 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, GPT-5.4 Pro or Hunyuan Hy3 Preview?
GPT-5.4 Pro supports 1.05m tokens, while Hunyuan Hy3 Preview supports 262k tokens. That gap matters most for long documents, large codebases, retrieval-heavy agents, and conversations where earlier context must remain visible.
Which is cheaper, GPT-5.4 Pro or Hunyuan Hy3 Preview?
GPT-5.4 Pro lists tiered pricing: 0-272,000t is $30/1M input and $180/1M output; 272,000t+ is $60/1M input and $270/1M output. Hunyuan Hy3 Preview lists $0.07/1M input and $0.26/1M output tokens on the cheapest tracked provider. Compare the tier you will actually use; cheap async pricing can overstate savings for interactive workflows. Provider discounts or batch pricing can still change the final bill.
Is GPT-5.4 Pro or Hunyuan Hy3 Preview open source?
GPT-5.4 Pro is listed under Proprietary. Hunyuan Hy3 Preview is listed under Tencent Hunyuan Community License. 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 vision, GPT-5.4 Pro or Hunyuan Hy3 Preview?
GPT-5.4 Pro has the clearer documented vision signal in this comparison. If vision is mission-critical, validate it against the provider endpoint because model-level support and API-level exposure can differ. Use this as a quick comparison signal, then confirm the provider-specific limits before committing to production.
Which is better for multimodal input, GPT-5.4 Pro or Hunyuan Hy3 Preview?
GPT-5.4 Pro 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.
Where can I run GPT-5.4 Pro and Hunyuan Hy3 Preview?
GPT-5.4 Pro is available on OpenRouter, OpenAI API, and Vercel AI Gateway. Hunyuan Hy3 Preview is available on OpenRouter and Tencent Cloud TI Platform. Provider coverage can affect latency, region availability, compliance posture, and fallback options.
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Last reviewed: 2026-06-29. Data sourced from public model cards and provider documentation.