Model comparison
GPT-5.4 Pro vs GPT-5 Pro
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 46.2 on the Noometry Index. GPT-5 Pro costs 1.6× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Last verified . 10 shared benchmarks.
Summary
- They share 10 benchmarks with published results for both. GPT-5.4 Pro scores higher in 3 categories and GPT-5 Pro in 1 category; 3 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.4 Pro leads 71.0 to 39.2.
- The biggest single-benchmark swing is ARC-AGI-2: 83.3% for GPT-5.4 Pro and 18.3% for GPT-5 Pro.
- GPT-5 Pro is cheaper at $15 / $120 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 400K.
Side by side
| GPT-5.4 Pro | GPT-5 Pro | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 58.8 | 46.2 |
| Released | 2026-03-05 | 2025-10-06 |
| Weights | Proprietary | Proprietary |
| Context window | 1.05M | 400K |
| Max output | 128K | 272K |
| Input $ / M tokens | $30 | $15 |
| Output $ / M tokens | $180 | $120 |
| Results tracked | 16 | 12 |
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Category by category
Coding Too close to call
GPT-5.4 Pro: 42.6 (#89), GPT-5 Pro: 43.4 (#77)
Reasoning GPT-5.4 Pro leads
GPT-5.4 Pro: 71.0 (#10), GPT-5 Pro: 39.2 (#52)
| Benchmark | GPT-5.4 Pro | GPT-5 Pro |
|---|---|---|
| ARC-AGI-2 | 83.3% | 18.3% |
| SimpleBench | 74.1% | 61.6% |
| ARC-AGI-1 | 94.5% | 70.2% |
| EnigmaEval | 23.8% | 18.8% |
| Epoch Capabilities Index | 159.12 | 150.26 |
| Kagi LLM Benchmark | — | 76.8% |
| CritPt | 30% | — |
| Chess Puzzles | 58.6% | — |
Math GPT-5.4 Pro leads
GPT-5.4 Pro: 72.0 (#17), GPT-5 Pro: 48.0 (#53)
| Benchmark | GPT-5.4 Pro | GPT-5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | 55.8% |
| FrontierMath Tier 4 | 58.5% | 19.5% |
| FrontierMath Tier 4 (v1) | 37.5% | 14.6% |
| FrontierMath (Feb 2025 set) | 50% | — |
Knowledge GPT-5.4 Pro leads
GPT-5.4 Pro: 68.3 (#6), GPT-5 Pro: 56.2 (#39)
| Benchmark | GPT-5.4 Pro | GPT-5 Pro |
|---|---|---|
| Humanity's Last Exam | 44.3% | 31.6% |
| GPQA Diamond | 94.6% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |
Frequently asked questions
Is GPT-5.4 Pro better than GPT-5 Pro?
GPT-5.4 Pro is the stronger model overall, scoring 58.8 to 46.2 on the Noometry Index. GPT-5 Pro costs 1.6× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.4 Pro or GPT-5 Pro?
GPT-5 Pro is cheaper. It lists at $15 per million input tokens and $120 per million output tokens; GPT-5.4 Pro lists at $30 and $180.
Is GPT-5.4 Pro or GPT-5 Pro better for coding?
They score almost the same on coding (42.6 vs 43.4); test both on your own repository before choosing.
Which has the bigger context window?
GPT-5.4 Pro does, with 1.05M tokens against 400K.
How many benchmarks do GPT-5.4 Pro and GPT-5 Pro share?
10 benchmarks have published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and GPT-5 Pro has 12.