Model comparison
GPT-5.4 nano vs GPT-5.4 Pro
Head-to-head evidence from 6 shared benchmark results across 4 categories. Overall scores shown here use the public BenchAlign v5 ranking lane.
Sibling matchup inside the GPT-5.4 family.
Public leaderboard positions: GPT-5.4 nano #25 (Supported); GPT-5.4 Pro #44 (Estimated). Intervals and evidence labels describe ranking uncertainty, not a guarantee for a specific workload.
Evidence parity. GPT-5.4 nano and GPT-5.4 Pro share 6 comparable benchmark results. 4 of 8 categories are comparable. 23 results are unique to GPT-5.4 nano; 6 to GPT-5.4 Pro.
Updated July 23, 2026- Shared results
- 6
- GPT-5.4 nano only
- 23
- GPT-5.4 Pro only
- 6
- Comparable categories
- 4 / 8
GPT-5.4 nano makes more sense if you want the cheaper token bill, while GPT-5.4 Pro is the cleaner fit if agentic is the priority or you need the larger 1.05M context window.
Confidence note. This is a partial-evidence comparison with 6 shared benchmark results across 4 evidence categories; 4 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 nano and GPT-5.4 Pro sit in the same GPT-5.4 family. This page is less about two unrelated model lineages and more about how the siblings trade off on benchmark shape, token costs, and practical limits like context window.
GPT-5.4 nano is clearly ahead on the BenchAlign aggregate, 66.79 to 60.89. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.20 input / $1.25 output per 1M tokens for GPT-5.4 nano. That is roughly 144.0x on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 400K for GPT-5.4 nano.
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 nano | Δ | GPT-5.4 Pro |
|---|---|---|---|
| Agentic | GPT-5.4 nano42.9 | Margin→ 46.4 | GPT-5.4 Pro89.3 |
| Multimodal | GPT-5.4 nano66.1 | Margin→ 27.9 | GPT-5.4 Pro94.0 |
| Math | GPT-5.4 nano21.0 | Margin→ 25.9 | GPT-5.4 Pro46.9 |
| Knowledge | GPT-5.4 nano43.8 | Margin→ 14.9 | GPT-5.4 Pro58.7 |
| Reasoning | GPT-5.4 nanoNot measured | MarginNo overlap | GPT-5.4 Pro83.3 |
Decisive benchmark drivers
The largest measured benchmark gaps in this matchup, with exact reported values.
More
- Source ↗
FrontierMath v2 (Tier 4)
MathA 6.250%B 37.500%Winner: GPT-5.4 ProΔ 31.3FrontierMath v2 (Tier 4): GPT-5.4 nano scored 6.250%; GPT-5.4 Pro scored 37.500%. GPT-5.4 Pro wins this benchmark. - Source ↗
MMMU-Pro
MultimodalA 66.1%B 94%Winner: GPT-5.4 ProΔ 27.9MMMU-Pro: GPT-5.4 nano scored 66.1%; GPT-5.4 Pro scored 94%. GPT-5.4 Pro wins this benchmark. - Source ↗
FrontierMath v2 (Tiers 1-3)
MathA 25.860%B 50.000%Winner: GPT-5.4 ProΔ 24.1FrontierMath v2 (Tiers 1-3): GPT-5.4 nano scored 25.860%; GPT-5.4 Pro scored 50.000%. GPT-5.4 Pro wins this benchmark. - Source ↗
HLE
KnowledgeA 37.7%B 58.7%Winner: GPT-5.4 ProΔ 21HLE: GPT-5.4 nano scored 37.7%; GPT-5.4 Pro scored 58.7%. 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 nano | GPT-5.4 Pro | Comparison |
|---|---|---|---|
| Input / output priceUSD per 1M tokens | GPT-5.4 nano$0.2 input / $1.25 output | GPT-5.4 Pro$30 input / $180 output | GPT-5.4 nano has the lower combined listed price. |
| Generation speedtokens per second | GPT-5.4 nano191 tok/s | GPT-5.4 Pro74 tok/s | GPT-5.4 nano has the higher measured throughput. |
| First-answer latencyseconds to first token | GPT-5.4 nano3.64 s | GPT-5.4 Pro151.79 s | GPT-5.4 nano reaches the first token sooner. |
| Context windowmaximum listed tokens | GPT-5.4 nano400K | GPT-5.4 Pro1.05M | GPT-5.4 Pro lists the larger context window. |
Benchmark Deep Dive
AgenticGPT-5.4 Pro wins10 benchmarks
| Benchmark | GPT-5.4 nano | GPT-5.4 Pro | Result |
|---|---|---|---|
| Terminal-Bench 2.0Source | 46.3% | — | Not comparable |
| OSWorld-VerifiedSource | 39% | — | Not comparable |
| MCP AtlasSource | 56.1% | — | Not comparable |
| ToolathlonSource | 35.5% | — | Not comparable |
| τ²-bench resultsSource | 76% | — | Not comparable |
| AA Agentic IndexSource | 27.5% | — | Not comparable |
| APEX-Agents-AASource | 24.9% | — | Not comparable |
| GDPval-AASource | 30.0% | — | Not comparable |
| GDPval-AASource | 1100 | — | Not comparable |
| BrowseCompSource | — | 89.3% | Not comparable |
Coding3 benchmarks
Reasoning3 benchmarks
KnowledgeGPT-5.4 Pro wins11 benchmarks
| Benchmark | GPT-5.4 nano | GPT-5.4 Pro | Result |
|---|---|---|---|
| GPQASource | 82.8% | — | Not comparable |
| HLESource | 37.7% | 58.7% | GPT-5.4 Pro leads |
| HLE w/o toolsSource | 24.3% | 42.7% | GPT-5.4 Pro leads |
| Artificial Analysis Intelligence IndexSource | 38.2% | — | Not comparable |
| AA-GPQA DiamondSource | 81.7% | — | Not comparable |
| AA-HLESource | 26.5% | — | Not comparable |
| AA-Omniscience IndexSource | -29.5% | — | Not comparable |
| AA-Omniscience AccuracySource | 25.4% | — | Not comparable |
| AA-Omniscience Hallucination RateSource | 73.6% | — | Not comparable |
| FrontierScienceSource | — | 36.7% | Not comparable |
| FrontierScience ResearchSource | — | 36.7% | Not comparable |
MathGPT-5.4 Pro wins4 benchmarks
MultimodalGPT-5.4 Pro wins3 benchmarks
Inst. Following1 benchmarks
| Benchmark | GPT-5.4 nano | GPT-5.4 Pro | Result |
|---|---|---|---|
| AA-IFBenchSource | 75.9% | — | Not comparable |
Frequently Asked Questions (5)
Which is better, GPT-5.4 nano or GPT-5.4 Pro?
GPT-5.4 nano and GPT-5.4 Pro are sibling variants in the GPT-5.4 family, so the right pick depends on whether you value the better benchmark line, cheaper tokens, or the larger context window. GPT-5.4 nano is ahead on BenchLM's BenchAlign leaderboard 66.79 to 60.89.
Which is better for knowledge tasks, GPT-5.4 nano or GPT-5.4 Pro?
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 58.7 versus 43.8. Inside this category, HLE is the benchmark that creates the most daylight between them.
Which is better for math, GPT-5.4 nano or GPT-5.4 Pro?
GPT-5.4 Pro has the edge for math in this comparison, averaging 46.9 versus 21. Inside this category, FrontierMath v2 (Tier 4) is the benchmark that creates the most daylight between them.
Which is better for agentic tasks, GPT-5.4 nano or GPT-5.4 Pro?
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 89.3 versus 42.9. GPT-5.4 nano stays close enough that the answer can still flip depending on your workload.
Which is better for multimodal and grounded tasks, GPT-5.4 nano or GPT-5.4 Pro?
GPT-5.4 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 94 versus 66.1. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
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