# GPT-5.2 Pro vs GPT-5.5 Instant

> GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 42.7 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-2-pro-vs-gpt-5-5-instant
- Last updated: 2026-10-12
- Shared benchmarks: 3

## Summary

- They share 3 benchmarks with published results for both. GPT-5.2 Pro scores higher in 2 categories and GPT-5.5 Instant in 0 categories; 2 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.2 Pro leads 65.3 to 26.5.
- The biggest single-benchmark swing is FrontierMath (Tiers 1-3): 74% for GPT-5.2 Pro and 26.3% for GPT-5.5 Instant.

## Snapshot

| | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 52.3 | 42.7 |
| Rank | 39 | 110 |
| Context | 400K | — |
| Input $/M | $21 | — |
| Output $/M | $168 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 44.3 (#74)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| SciCode | — | 48.6% |
| LMArena Coding | — | 1433 |

## Reasoning

- GPT-5.2 Pro: 51.5 (#33)
- GPT-5.5 Instant: 24.9 (#155)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| Epoch Capabilities Index | 155.4 | 142.52 |
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| NYT Connections (extended) | 79.3% | — |
| ARC-AGI-1 | 90.5% | — |
| CritPt | — | 0% |
| Chess Puzzles | — | 12% |
| LMArena Hard Prompts | — | 1426 |

## Math

- GPT-5.2 Pro: 65.3 (#29)
- GPT-5.5 Instant: 26.5 (#259)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | 26.3% |
| FrontierMath Tier 4 | 46% | 2.4% |
| OTIS Mock AIME 2024-2025 | — | 68.1% |
| LMArena Math | — | 1420 |
| FrontierMath Tier 4 (v1) | 31.3% | — |

## Knowledge

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 48.9 (#74)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| GPQA Diamond | — | 82.5% |
| LMArena Expert | — | 1409 |

## Multimodal

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 40.0 (#52)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| LMArena Vision | — | 1250 |
| LMArena Document | — | 1403 |

## Multilingual

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 52.8 (#80)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| LMArena Non-English | — | 1417 |
| LMArena Chinese | — | 1456 |
| LMArena French | — | 1428 |
| LMArena German | — | 1411 |
| LMArena Japanese | — | 1408 |
| LMArena Korean | — | 1392 |
| LMArena Russian | — | 1431 |
| LMArena Spanish | — | 1429 |

## Instruction Following

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 74.2 (#100)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| LMArena Instruction Following | — | 1406 |

## Long Context

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 43.4 (#96)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| LMArena Longer Query | — | 1422 |

## Writing & Preference

- GPT-5.2 Pro: —
- GPT-5.5 Instant: 61.8 (#85)

| Benchmark | GPT-5.2 Pro | GPT-5.5 Instant |
|---|---|---|
| LMArena Text | — | 1419 |
| LMArena Creative Writing | — | 1419 |
| LMArena Multi-Turn | — | 1433 |

## FAQ

### Is GPT-5.2 Pro better than GPT-5.5 Instant?

GPT-5.2 Pro is the stronger model overall, scoring 52.3 to 42.7 on the Noometry Index.

### How many benchmarks do GPT-5.2 Pro and GPT-5.5 Instant share?

3 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and GPT-5.5 Instant has 27.