Model comparison
GPT-5.4 Pro vs Hy3 Preview
Head-to-head evidence from 2 shared benchmark results across 2 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Public leaderboard positions: GPT-5.4 Pro #44 (Estimated); Hy3 Preview unranked (Not scored). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.4 Pro and Hy3 Preview share 2 comparable benchmark results. 2 of 8 categories are comparable. 10 results are unique to GPT-5.4 Pro; 20 to Hy3 Preview.
Updated July 23, 2026- Shared results
- 2
- GPT-5.4 Pro only
- 10
- Hy3 Preview only
- 20
- Comparable categories
- 2 / 8
Treat this as a split decision. GPT-5.4 Pro makes more sense if agentic is the priority or you need the larger 1.05M context window; Hy3 Preview is the better fit if you want the cheaper token bill.
Confidence note. This is a partial-evidence comparison with 2 shared benchmark results across 2 evidence categories; 2 of 8 categories currently have scoreable aggregates for both models. Treat the verdict as directional until coverage is more balanced.
Why this result
GPT-5.4 Pro and Hy3 Preview finish on the same BenchAlign overall score, so this is less about a single winner and more about where the edge shows up. The BenchAlign headline says tie; the benchmark table is where the real choice happens.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Hy3 Preview. That is roughly Infinityx on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 256K for Hy3 Preview.
Category breakdown
Exact category averages are shown below. Not measured means BenchLM does not have enough sourced public coverage for that model and category.
| Category | GPT-5.4 Pro | Δ | Hy3 Preview |
|---|---|---|---|
| Agentic | GPT-5.4 Pro89.3 | Margin← 34.9 | Hy3 Preview54.4 |
| Knowledge | GPT-5.4 Pro58.7 | Margin← 24.9 | Hy3 Preview33.8 |
| Coding | GPT-5.4 ProNot measured | MarginNo overlap | Hy3 Preview57.8 |
| Reasoning | GPT-5.4 Pro83.3 | MarginNo overlap | Hy3 PreviewNot measured |
| Math | GPT-5.4 Pro46.9 | MarginNo overlap | Hy3 PreviewNot measured |
| Multimodal | GPT-5.4 Pro94.0 | MarginNo overlap | Hy3 PreviewNot measured |
| Inst. Following | GPT-5.4 ProNot measured | MarginNo overlap | Hy3 Preview63.1 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
HLE
KnowledgeA 58.7%B 25.5%Winner: GPT-5.4 ProΔ 33.2HLE: GPT-5.4 Pro scored 58.7%; Hy3 Preview scored 25.5%. GPT-5.4 Pro wins this benchmark.
Operational comparison
Runtime and commercial metrics are compared only when both models have a complete sourced value.
| Metric | GPT-5.4 Pro | Hy3 Preview | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.4 Pro$30 input / $180 output | Hy3 Preview$0 input / $0 output | Hy3 Preview has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.4 Pro74 tok/s | Hy3 PreviewNot available | A complete speed comparison is not available. |
| First-answer latencyseconds to first token | GPT-5.4 Pro151.79 s | Hy3 PreviewNot available | A complete latency comparison is not available. |
| Context windowmaximum listed tokens | GPT-5.4 Pro1.05M | Hy3 Preview256K | GPT-5.4 Pro lists the larger context window. |
Benchmark Deep Dive
AgenticGPT-5.4 Pro wins6 benchmarks
Coding5 benchmarks
Reasoning3 benchmarks
KnowledgeGPT-5.4 Pro wins12 benchmarks
| Benchmark | GPT-5.4 Pro | Hy3 Preview | Result |
|---|---|---|---|
| HLESource | 58.7% | 25.5% | GPT-5.4 Pro leads |
| FrontierScienceSource | 36.7% | — | Not comparable |
| FrontierScience ResearchSource | 36.7% | — | Not comparable |
| HLE w/o toolsSource | 42.7% | — | Not comparable |
| Artificial Analysis Intelligence IndexSource | — | 41.2% | Not comparable |
| GPQASource | — | 87.2% | Not comparable |
| GPQA-DSource | — | 87.2% | Not comparable |
| AA-Omniscience AccuracySource | — | 31.5% | Not comparable |
| AA-Omniscience Hallucination RateSource | — | 73.0% | Not comparable |
| AA-GPQA DiamondSource | — | 89.7% | Not comparable |
| AA-HLESource | — | 31.6% | Not comparable |
| AA-Omniscience IndexSource | — | -18.5% | Not comparable |
Math4 benchmarks
Multimodal1 benchmarks
| Benchmark | GPT-5.4 Pro | Hy3 Preview | Result |
|---|---|---|---|
| MMMU-ProSource | 94% | — | Not comparable |
Inst. Following1 benchmarks
| Benchmark | GPT-5.4 Pro | Hy3 Preview | Result |
|---|---|---|---|
| IFBenchSource | — | 63.1% | Not comparable |
Frequently Asked Questions (3)
Which is better, GPT-5.4 Pro or Hy3 Preview?
GPT-5.4 Pro and Hy3 Preview are tied on the BenchAlign overall score, so the right pick depends on which category matters most for your use case.
Which is better for knowledge tasks, GPT-5.4 Pro or Hy3 Preview?
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 58.7 versus 33.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, GPT-5.4 Pro or Hy3 Preview?
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 89.3 versus 54.4. Hy3 Preview stays close enough that the answer can still flip depending on your workload.
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