Model comparison
GPT-5.2 Pro vs GPT-5.5 Pro
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 52.2 on the Noometry Index.
Last verified . 7 shared benchmarks.
Summary
- They share 7 benchmarks with published results for both. GPT-5.2 Pro scores higher in 0 categories and GPT-5.5 Pro in 2 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.5 Pro leads 73.6 to 51.8.
- The biggest single-benchmark swing is FrontierMath Tier 4: 46% for GPT-5.2 Pro and 78% for GPT-5.5 Pro.
- GPT-5.2 Pro is cheaper at $21 / $168 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 400K.
Side by side
| GPT-5.2 Pro | GPT-5.5 Pro | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 52.2 | 64.3 |
| Released | 2025-12-11 | 2026-04-23 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 1.05M |
| Max output | 128K | 128K |
| Input $ / M tokens | $21 | $30 |
| Output $ / M tokens | $168 | $180 |
| Results tracked | 8 | 14 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Reasoning GPT-5.5 Pro leads
GPT-5.2 Pro: 51.8 (#31), GPT-5.5 Pro: 73.6 (#7)
| Benchmark | GPT-5.2 Pro | GPT-5.5 Pro |
|---|---|---|
| ARC-AGI-2 | 54.2% | 84.6% |
| SimpleBench | 57.4% | 76.9% |
| ARC-AGI-1 | 90.5% | 96.5% |
| Epoch Capabilities Index | 155.41 | 162.45 |
| NYT Connections (extended) | 79.3% | — |
| CritPt | — | 30.6% |
| Chess Puzzles | — | 64% |
| DTBench | — | 96% |
| LMCA | — | 53.9% |
Math GPT-5.5 Pro leads
GPT-5.2 Pro: 64.8 (#23), GPT-5.5 Pro: 83.8 (#8)
| Benchmark | GPT-5.2 Pro | GPT-5.5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | 87.7% |
| FrontierMath Tier 4 | 46% | 78% |
| FrontierMath Tier 4 (v1) | 31.3% | 39.6% |
| OTIS Mock AIME 2024-2025 | — | 100% |
| FrontierMath (Feb 2025 set) | — | 52.4% |
Knowledge Not comparable
GPT-5.2 Pro: —, GPT-5.5 Pro: 64.2 (#17)
| Benchmark | GPT-5.2 Pro | GPT-5.5 Pro |
|---|---|---|
| GPQA Diamond | — | 93.9% |
Frequently asked questions
Is GPT-5.2 Pro better than GPT-5.5 Pro?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 52.2 on the Noometry Index.
Which is cheaper, GPT-5.2 Pro or GPT-5.5 Pro?
GPT-5.2 Pro is cheaper. It lists at $21 per million input tokens and $168 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 400K.
How many benchmarks do GPT-5.2 Pro and GPT-5.5 Pro share?
7 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and GPT-5.5 Pro has 14.