Model comparison
GPT-5.2 Pro vs GPT-5 Nano
GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 33.4 on the Noometry Index. GPT-5 Nano costs 420× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Last verified . 6 shared benchmarks.
Summary
- They share 6 benchmarks with published results for both. GPT-5.2 Pro scores higher in 2 categories and GPT-5 Nano in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.2 Pro leads 64.8 to 29.1.
- The biggest single-benchmark swing is ARC-AGI-1: 90.5% for GPT-5.2 Pro and 20.7% for GPT-5 Nano.
- GPT-5 Nano is cheaper at $0.05 / $0.40 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
Side by side
| GPT-5.2 Pro | GPT-5 Nano | |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 52.2 | 33.4 |
| Released | 2025-12-11 | 2025-08-07 |
| Weights | Proprietary | Proprietary |
| Context window | 400K | 400K |
| Max output | 128K | 128K |
| Input $ / M tokens | $21 | $0.05 |
| Output $ / M tokens | $168 | $0.40 |
| Results tracked | 8 | 48 |
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Category by category
Coding Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 33.3 (#248)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| SWE-bench Verified (bash only) | — | 34.8% |
| WeirdML | — | 38.1% |
| LMArena Coding | — | 1351 |
| ALE-Bench | — | 718.67 |
Agentic & Tool Use Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 25.6 (#99)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| Terminal-Bench | — | 21.8% |
| Berkeley Function Calling Leaderboard | — | 51.5% |
Reasoning GPT-5.2 Pro leads
GPT-5.2 Pro: 51.8 (#31), GPT-5 Nano: 16.4 (#291)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| ARC-AGI-2 | 54.2% | 2.6% |
| ARC-AGI-1 | 90.5% | 20.7% |
| Epoch Capabilities Index | 155.41 | 139.39 |
| SimpleBench | 57.4% | — |
| Kagi LLM Benchmark | — | 62.2% |
| NYT Connections (extended) | 79.3% | — |
| Chess Puzzles | — | 27% |
| LMArena Hard Prompts | — | 1329 |
| Mystery Game Puzzles | — | 9% |
| DTBench | — | 62.7% |
| LMCA | — | 7.9% |
| ForecastBench | — | 59.1 |
Math GPT-5.2 Pro leads
GPT-5.2 Pro: 64.8 (#23), GPT-5 Nano: 29.1 (#221)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | 20% |
| FrontierMath Tier 4 | 46% | 2.4% |
| FrontierMath Tier 4 (v1) | 31.3% | 2.1% |
| OTIS Mock AIME 2024-2025 | — | 81.1% |
| ProofBench | — | 12% |
| Omni-MATH | — | 54.6% |
| LMArena Math | — | 1318 |
| MATH Level 5 | — | 95.2% |
| FrontierMath (Feb 2025 set) | — | 8.3% |
Knowledge Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 35.8 (#166)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| GPQA Diamond | — | 69.4% |
| SimpleQA Verified | — | 11.7% |
| MMLU-Pro | — | 77.8% |
| Vectara Hallucination Rate | — | 10.5% |
| GPQA (HELM) | — | 67.9% |
| LMArena Expert | — | 1321 |
Multimodal Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 30.7 (#102)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| LMArena Vision | — | 1159 |
| VPCT | — | 37.2% |
Multilingual Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 45.5 (#167)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| LMArena Non-English | — | 1313 |
| LMArena Chinese | — | 1355 |
| LMArena German | — | 1329 |
| LMArena Korean | — | 1269 |
| LMArena Russian | — | 1296 |
| LMArena Spanish | — | 1360 |
Instruction Following Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 75.2 (#72)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| IFEval | — | 93.2% |
| LMArena Instruction Following | — | 1306 |
Long Context Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 31.3 (#275)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| Fiction.LiveBench | — | 44.4% |
| LMArena Longer Query | — | 1313 |
Writing & Preference Not comparable
GPT-5.2 Pro: —, GPT-5 Nano: 39.4 (#244)
| Benchmark | GPT-5.2 Pro | GPT-5 Nano |
|---|---|---|
| LMArena Text | — | 1320 |
| LMArena Creative Writing | — | 1250 |
| EQ-Bench Creative Writing | — | 705 |
| WildBench | — | 80.6% |
| LMArena Multi-Turn | — | 1311 |
Frequently asked questions
Is GPT-5.2 Pro better than GPT-5 Nano?
GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 33.4 on the Noometry Index. GPT-5 Nano costs 420× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.2 Pro or GPT-5 Nano?
GPT-5 Nano is cheaper. It lists at $0.05 per million input tokens and $0.40 per million output tokens; GPT-5.2 Pro lists at $21 and $168.
Which has the bigger context window?
Both accept 400K tokens.
How many benchmarks do GPT-5.2 Pro and GPT-5 Nano share?
6 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and GPT-5 Nano has 48.