# GPT-5.3 Codex vs INTELLECT-1

> GPT-5.3 Codex has enough public results to be ranked (#69); INTELLECT-1 does not yet, so treat this comparison as directional.

- Canonical page: https://noometry.com/compare/gpt-5-3-codex-vs-intellect-1
- Last updated: 2026-10-12
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both.

## Snapshot

| | GPT-5.3 Codex | INTELLECT-1 |
|---|---|---|
| Provider | OpenAI | Hugging Face |
| Noometry Index | 45.8 | — |
| Rank | 69 | — |
| Context | 400K | — |
| Input $/M | $1.75 | — |
| Output $/M | $14 | — |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Codex: 48.6 (#56)
- INTELLECT-1: —

| Benchmark | GPT-5.3 Codex | INTELLECT-1 |
|---|---|---|
| SWE-bench Verified | 74.8% | — |
| LMArena WebDev | 1409 | — |
| WeirdML | 79.3% | — |
| ALE-Bench | 1,655 | — |

## Agentic & Tool Use

- GPT-5.3 Codex: 48.0 (#9)
- INTELLECT-1: —

| Benchmark | GPT-5.3 Codex | INTELLECT-1 |
|---|---|---|
| Terminal-Bench | 78.4% | — |
| METR Time Horizons | 74.5% | — |
| Vending-Bench 2 | 5,940 | — |

## Reasoning

- GPT-5.3 Codex: —
- INTELLECT-1: —

| Benchmark | GPT-5.3 Codex | INTELLECT-1 |
|---|---|---|
| Epoch Capabilities Index | 156.77 | 100.86 |
| BIG-Bench Hard | — | 34.9% |
| HellaSwag | — | 71.4% |
| WinoGrande | — | 65.8% |

## Math

- GPT-5.3 Codex: —
- INTELLECT-1: —

| Benchmark | GPT-5.3 Codex | INTELLECT-1 |
|---|---|---|
| GSM8K | — | 38.6% |

## Knowledge

- GPT-5.3 Codex: —
- INTELLECT-1: —

| Benchmark | GPT-5.3 Codex | INTELLECT-1 |
|---|---|---|
| ARC (AI2) Challenge | — | 54.5% |
| MMLU | — | 49.9% |

## FAQ

### Is GPT-5.3 Codex better than INTELLECT-1?

GPT-5.3 Codex has enough public results to be ranked (#69); INTELLECT-1 does not yet, so treat this comparison as directional.

### How many benchmarks do GPT-5.3 Codex and INTELLECT-1 share?

1 benchmark has published results for both models. GPT-5.3 Codex has 8 scored results on Noometry and INTELLECT-1 has 7.