Model comparison
GPT-5.2 Pro vs Mercury
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 37.6 on the Noometry Index.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5.2 Pro leads 51.5 to 17.5.
Side by side
| GPT-5.2 Pro | Mercury | |
|---|---|---|
| Provider | OpenAI | Inception |
| Noometry Index | 52.3 | 37.6 |
| Released | 2025-12-11 | — |
| Weights | Proprietary | Proprietary |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $21 | — |
| Output $ / M tokens | $168 | — |
| Results tracked | 8 | 9 |
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Category by category
Coding Not comparable
GPT-5.2 Pro: —, Mercury: 38.7 (#170)
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| LMArena Coding | — | 1322 |
Reasoning GPT-5.2 Pro leads
GPT-5.2 Pro: 51.5 (#33), Mercury: 17.5 (#293)
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| Kagi LLM Benchmark | — | 21.6% |
| NYT Connections (extended) | 79.3% | — |
| ARC-AGI-1 | 90.5% | — |
| LMArena Hard Prompts | — | 1285 |
| Epoch Capabilities Index | 155.4 | — |
Math Not comparable
GPT-5.2 Pro: 65.3 (#29), Mercury: —
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| FrontierMath Tier 4 (v1) | 31.3% | — |
Multilingual Not comparable
GPT-5.2 Pro: —, Mercury: 41.6 (#206)
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| LMArena Non-English | — | 1260 |
Instruction Following Not comparable
GPT-5.2 Pro: —, Mercury: 65.2 (#224)
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| LMArena Instruction Following | — | 1239 |
Long Context Not comparable
GPT-5.2 Pro: —, Mercury: 38.4 (#198)
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| LMArena Longer Query | — | 1266 |
Writing & Preference Not comparable
GPT-5.2 Pro: —, Mercury: 46.2 (#221)
| Benchmark | GPT-5.2 Pro | Mercury |
|---|---|---|
| LMArena Text | — | 1282 |
| LMArena Creative Writing | — | 1191 |
| LMArena Multi-Turn | — | 1282 |
Frequently asked questions
Is GPT-5.2 Pro better than Mercury?
GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 37.6 on the Noometry Index.
How many benchmarks do GPT-5.2 Pro and Mercury share?
0 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Mercury has 9.