# GPT-5.4 Pro vs GPT-5-Codex

> GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 37.9 on the Noometry Index. GPT-5-Codex costs 20× 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-5-4-pro-vs-gpt-5-codex
- Last updated: 2026-10-11
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5.4 Pro scores higher in 2 categories and GPT-5-Codex in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5.4 Pro leads 70.7 to 30.9.
- GPT-5-Codex is cheaper at $1.25 / $10 per million input/output tokens, against $30 / $180 for GPT-5.4 Pro.
- GPT-5.4 Pro accepts more context: 1.05M tokens versus 400K.

## Snapshot

| | GPT-5.4 Pro | GPT-5-Codex |
|---|---|---|
| Provider | OpenAI | OpenAI |
| Noometry Index | 58.9 | 37.9 |
| Rank | 18 | 192 |
| Context | 1.05M | 400K |
| Input $/M | $30 | $1.25 |
| Output $/M | $180 | $10 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.4 Pro: 43.2 (#90)
- GPT-5-Codex: 42.4 (#103)

| Benchmark | GPT-5.4 Pro | GPT-5-Codex |
|---|---|---|
| WeirdML | 57.4% | 54.5% |

## Agentic & Tool Use

- GPT-5.4 Pro: —
- GPT-5-Codex: 31.0 (#72)

| Benchmark | GPT-5.4 Pro | GPT-5-Codex |
|---|---|---|
| Terminal-Bench | — | 44.3% |

## Reasoning

- GPT-5.4 Pro: 70.7 (#13)
- GPT-5-Codex: 30.9 (#83)

| Benchmark | GPT-5.4 Pro | GPT-5-Codex |
|---|---|---|
| ARC-AGI-2 | 83.3% | — |
| SimpleBench | 74.1% | — |
| Kagi LLM Benchmark | — | 70.3% |
| ARC-AGI-1 | 94.5% | — |
| CritPt | 30% | — |
| Chess Puzzles | 58.6% | — |
| EnigmaEval | 23.8% | — |
| Epoch Capabilities Index | 158.93 | — |

## Math

- GPT-5.4 Pro: 72.4 (#22)
- GPT-5-Codex: —

| Benchmark | GPT-5.4 Pro | GPT-5-Codex |
|---|---|---|
| FrontierMath (Tiers 1-3) | 82.5% | — |
| FrontierMath Tier 4 | 58.5% | — |
| FrontierMath (Feb 2025 set) | 50% | — |
| FrontierMath Tier 4 (v1) | 37.5% | — |

## Knowledge

- GPT-5.4 Pro: 68.3 (#7)
- GPT-5-Codex: —

| Benchmark | GPT-5.4 Pro | GPT-5-Codex |
|---|---|---|
| GPQA Diamond | 94.6% | — |
| Humanity's Last Exam | 44.3% | — |
| SimpleQA Verified | 46.3% | — |
| Vectara Hallucination Rate | 8.3% | — |

## FAQ

### Is GPT-5.4 Pro better than GPT-5-Codex?

GPT-5.4 Pro is the stronger model overall, scoring 58.9 to 37.9 on the Noometry Index. GPT-5-Codex costs 20× 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-5.4 Pro or GPT-5-Codex?

GPT-5-Codex is cheaper. It lists at $1.25 per million input tokens and $10 per million output tokens; GPT-5.4 Pro lists at $30 and $180.

### Is GPT-5.4 Pro or GPT-5-Codex better for coding?

They score almost the same on coding (43.2 vs 42.4); test both on your own repository before choosing.

### Which has the bigger context window?

GPT-5.4 Pro does, with 1.05M tokens against 400K.

### How many benchmarks do GPT-5.4 Pro and GPT-5-Codex share?

1 benchmark has published results for both models. GPT-5.4 Pro has 16 scored results on Noometry and GPT-5-Codex has 3.