# GPT-5.3 Chat vs GPT-5.4 Pro

> GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 42.8 on the Noometry Index. GPT-5.3 Chat costs 14× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-gpt-5-4-pro
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in reasoning, where GPT-5.4 Pro leads 70.7 to 28.5.
- GPT-5.3 Chat is cheaper at $1.75 / $14 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 128K.

## Snapshot

| | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 42.8 | 58.9 |
| Rank | 109 | 18 |
| Context | 128K | 1.05M |
| Input $/M | $1.75 | $30 |
| Output $/M | $14 | $180 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- GPT-5.4 Pro: 43.2 (#90)

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| WeirdML | — | 57.4% |
| LMArena Coding | 1408 | — |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- GPT-5.4 Pro: 70.7 (#13)

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| ARC-AGI-2 | — | 83.3% |
| SimpleBench | — | 74.1% |
| ARC-AGI-1 | — | 94.5% |
| CritPt | — | 30% |
| Chess Puzzles | — | 58.6% |
| EnigmaEval | — | 23.8% |
| LMArena Hard Prompts | 1399 | — |
| Epoch Capabilities Index | — | 158.93 |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- GPT-5.4 Pro: 72.4 (#22)

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 82.5% |
| FrontierMath Tier 4 | — | 58.5% |
| LMArena Math | 1389 | — |
| FrontierMath (Feb 2025 set) | — | 50% |
| FrontierMath Tier 4 (v1) | — | 37.5% |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- GPT-5.4 Pro: 68.3 (#7)

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| GPQA Diamond | — | 94.6% |
| Humanity's Last Exam | — | 44.3% |
| SimpleQA Verified | — | 46.3% |
| Vectara Hallucination Rate | — | 8.3% |
| LMArena Expert | 1397 | — |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- GPT-5.4 Pro: —

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Non-English | 1382 | — |
| LMArena Chinese | 1432 | — |
| LMArena French | 1397 | — |
| LMArena German | 1384 | — |
| LMArena Japanese | 1352 | — |
| LMArena Korean | 1346 | — |
| LMArena Russian | 1400 | — |
| LMArena Spanish | 1371 | — |

## Instruction Following

- GPT-5.3 Chat: 72.8 (#129)
- GPT-5.4 Pro: —

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Instruction Following | 1378 | — |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- GPT-5.4 Pro: —

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Longer Query | 1396 | — |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- GPT-5.4 Pro: —

| Benchmark | GPT-5.3 Chat | GPT-5.4 Pro |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| LMArena Multi-Turn | 1412 | — |

## FAQ

### Is GPT-5.3 Chat better than GPT-5.4 Pro?

GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 42.8 on the Noometry Index. GPT-5.3 Chat costs 14× less per token, which makes it the better buy when GPT-5.4 Pro's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.3 Chat or GPT-5.4 Pro?

GPT-5.3 Chat is cheaper. It lists at $1.75 per million input tokens and $14 per million output tokens; GPT-5.4 Pro lists at $30 and $180.

### Is GPT-5.3 Chat or GPT-5.4 Pro better for coding?

GPT-5.4 Pro scores higher on coding benchmarks: 43.2 versus 41.4 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.4 Pro does, with 1.05M tokens against 128K.

### How many benchmarks do GPT-5.3 Chat and GPT-5.4 Pro share?

0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and GPT-5.4 Pro has 16.