# GPT-5-Codex vs Nova Premier 1.0

> GPT-5-Codex and Nova Premier 1.0 score almost the same on the Noometry Index (37.9 vs 38.3), so choose on price, context window or the category you care about most.

- Canonical page: https://noometry.com/compare/gpt-5-codex-vs-nova-premier-1-0
- Last updated: 2026-10-10
- Shared benchmarks: 1

## Summary

- They share 1 benchmark with published results for both. GPT-5-Codex scores higher in 1 category and Nova Premier 1.0 in 0 categories; one gap is clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5-Codex leads 30.9 to 23.0.
- The biggest single-benchmark swing is Kagi LLM Benchmark: 70.3% for GPT-5-Codex and 44.8% for Nova Premier 1.0.
- GPT-5-Codex is cheaper at $1.25 / $10 per million input/output tokens, against $2.50 / $12.50 for Nova Premier 1.0.
- Nova Premier 1.0 accepts more context: 1M tokens versus 400K.

## Snapshot

| | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 37.9 | 38.3 |
| Rank | 192 | 189 |
| Context | 400K | 1M |
| Input $/M | $1.25 | $2.50 |
| Output $/M | $10 | $12.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5-Codex: 42.4 (#103)
- Nova Premier 1.0: —

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| WeirdML | 54.5% | — |

## Agentic & Tool Use

- GPT-5-Codex: 31.0 (#72)
- Nova Premier 1.0: —

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| Terminal-Bench | 44.3% | — |

## Reasoning

- GPT-5-Codex: 30.9 (#83)
- Nova Premier 1.0: 23.0 (#185)

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | 70.3% | 44.8% |

## Math

- GPT-5-Codex: —
- Nova Premier 1.0: 33.8 (#199)

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| Omni-MATH | — | 35% |

## Knowledge

- GPT-5-Codex: —
- Nova Premier 1.0: 35.8 (#180)

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| MMLU-Pro | — | 72.6% |
| GPQA (HELM) | — | 51.8% |

## Instruction Following

- GPT-5-Codex: —
- Nova Premier 1.0: 66.8 (#204)

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| IFEval | — | 80.3% |

## Writing & Preference

- GPT-5-Codex: —
- Nova Premier 1.0: 51.0 (#178)

| Benchmark | GPT-5-Codex | Nova Premier 1.0 |
|---|---|---|
| WildBench | — | 78.8% |

## FAQ

### Is GPT-5-Codex better than Nova Premier 1.0?

GPT-5-Codex and Nova Premier 1.0 score almost the same on the Noometry Index (37.9 vs 38.3), so choose on price, context window or the category you care about most.

### Which is cheaper, GPT-5-Codex or Nova Premier 1.0?

GPT-5-Codex is cheaper. It lists at $1.25 per million input tokens and $10 per million output tokens; Nova Premier 1.0 lists at $2.50 and $12.50.

### Which has the bigger context window?

Nova Premier 1.0 does, with 1M tokens against 400K.

### How many benchmarks do GPT-5-Codex and Nova Premier 1.0 share?

1 benchmark has published results for both models. GPT-5-Codex has 3 scored results on Noometry and Nova Premier 1.0 has 6.