Noometry

Model comparison

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.

Last verified . 1 shared benchmarks.

GPT-5.3 Codex OpenAI

45.8

Rank #69 Reported

INTELLECT-1 Hugging Face

—

Unranked

Summary

  • They share 1 benchmark with published results for both.

Side by side

GPT-5.3 CodexINTELLECT-1
ProviderOpenAIHugging Face
Noometry Index45.8—
Released2026-02-052024-11-29
WeightsProprietaryProprietary
Context window400K—
Max output128K—
Input $ / M tokens$1.75—
Output $ / M tokens$14—
Results tracked87

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Category by category

Coding Not comparable

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

BenchmarkGPT-5.3 CodexINTELLECT-1
SWE-bench Verified74.8%—
LMArena WebDev1409—
WeirdML79.3%—
ALE-Bench1,655—

Agentic & Tool Use Not comparable

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

BenchmarkGPT-5.3 CodexINTELLECT-1
Terminal-Bench78.4%—
METR Time Horizons74.5%—
Vending-Bench 25,940—

Reasoning Not comparable

GPT-5.3 Codex: —, INTELLECT-1: —

BenchmarkGPT-5.3 CodexINTELLECT-1
Epoch Capabilities Index156.77100.86
BIG-Bench Hard—34.9%
HellaSwag—71.4%
WinoGrande—65.8%

Math Not comparable

GPT-5.3 Codex: —, INTELLECT-1: —

BenchmarkGPT-5.3 CodexINTELLECT-1
GSM8K—38.6%

Knowledge Not comparable

GPT-5.3 Codex: —, INTELLECT-1: —

BenchmarkGPT-5.3 CodexINTELLECT-1
ARC (AI2) Challenge—54.5%
MMLU—49.9%

Frequently asked questions

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.

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