# GPT-4 vs GPT-5.3 Chat

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 29.1 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-4-vs-gpt-5-3-chat
- Last updated: 2026-10-10
- Shared benchmarks: 18

## Summary

- They share 18 benchmarks with published results for both. GPT-4 scores higher in 0 categories and GPT-5.3 Chat in 8 categories; 8 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 34.9.
- GPT-5.3 Chat is cheaper at $1.75 / $14 per million input/output tokens, against $30 / $60 for GPT-4.
- GPT-5.3 Chat accepts more context: 128K tokens versus 8K.

## Snapshot

| | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 29.1 | 42.8 |
| Rank | 316 | 109 |
| Context | 8K | 128K |
| Input $/M | $30 | $1.75 |
| Output $/M | $60 | $14 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-4: 31.6 (#283)
- GPT-5.3 Chat: 41.4 (#124)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Coding | 1254 | 1408 |
| WeirdML | 12.4% | — |
| BigCodeBench Instruct | 46% | — |
| BigCodeBench Complete | 57.2% | — |
| HumanEval+ | 79.3% | — |

## Agentic & Tool Use

- GPT-4: —
- GPT-5.3 Chat: —

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| METR Time Horizons | 36.1% | — |

## Reasoning

- GPT-4: 17.8 (#289)
- GPT-5.3 Chat: 28.5 (#102)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Hard Prompts | 1241 | 1399 |
| Chess Puzzles | 4% | — |
| Mystery Game Puzzles | 12% | — |
| DTBench | 62.7% | — |
| LMCA | 17.1% | — |
| BIG-Bench Hard | 75.1% | — |
| Epoch Capabilities Index | 125.89 | — |
| ForecastBench | 57.8 | — |
| HellaSwag | 95.3% | — |
| WinoGrande | 87.5% | — |

## Math

- GPT-4: 10.8 (#309)
- GPT-5.3 Chat: 38.2 (#142)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Math | 1269 | 1389 |
| OTIS Mock AIME 2024-2025 | 1.1% | — |
| MATH Level 5 | 23% | — |
| GSM8K | 92% | — |

## Knowledge

- GPT-4: 18.4 (#282)
- GPT-5.3 Chat: 38.8 (#140)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Expert | 1211 | 1397 |
| GPQA Diamond | 35.7% | — |
| MMLU | 86.4% | — |
| TriviaQA | 84.8% | — |

## Multilingual

- GPT-4: 40.6 (#215)
- GPT-5.3 Chat: 50.3 (#124)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Non-English | 1246 | 1382 |
| LMArena Chinese | 1242 | 1432 |
| LMArena French | 1283 | 1397 |
| LMArena German | 1251 | 1384 |
| LMArena Japanese | 1209 | 1352 |
| LMArena Korean | 1184 | 1346 |
| LMArena Russian | 1251 | 1400 |
| LMArena Spanish | 1261 | 1371 |

## Instruction Following

- GPT-4: 65.3 (#222)
- GPT-5.3 Chat: 72.8 (#129)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Instruction Following | 1241 | 1378 |

## Long Context

- GPT-4: 37.7 (#212)
- GPT-5.3 Chat: 42.6 (#120)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Longer Query | 1244 | 1396 |

## Writing & Preference

- GPT-4: 34.9 (#268)
- GPT-5.3 Chat: 63.1 (#68)

| Benchmark | GPT-4 | GPT-5.3 Chat |
|---|---|---|
| LMArena Text | 1263 | 1389 |
| LMArena Creative Writing | 1244 | 1355 |
| EQ-Bench Creative Writing | 752 | 1690 |
| LMArena Multi-Turn | 1257 | 1412 |

## FAQ

### Is GPT-4 better than GPT-5.3 Chat?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 29.1 on the Noometry Index.

### Which is cheaper, GPT-4 or GPT-5.3 Chat?

GPT-5.3 Chat is cheaper. It lists at $1.75 per million input tokens and $14 per million output tokens; GPT-4 lists at $30 and $60.

### Is GPT-4 or GPT-5.3 Chat better for coding?

GPT-5.3 Chat scores higher on coding benchmarks: 41.4 versus 31.6 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.3 Chat does, with 128K tokens against 8K.

### How many benchmarks do GPT-4 and GPT-5.3 Chat share?

18 benchmarks have published results for both models. GPT-4 has 38 scored results on Noometry and GPT-5.3 Chat has 18.