# GPT-5.3 Chat vs Nova Premier 1.0

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 38.3 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-nova-premier-1-0
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 51.0.
- Both cost about the same: $1.75 input and $14 output per million tokens.
- Nova Premier 1.0 accepts more context: 1M tokens versus 128K.

## Snapshot

| | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.8 | 38.3 |
| Rank | 109 | 189 |
| Context | 128K | 1M |
| Input $/M | $1.75 | $2.50 |
| Output $/M | $14 | $12.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- Nova Premier 1.0: —

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Coding | 1408 | — |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- Nova Premier 1.0: 23.0 (#185)

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| Kagi LLM Benchmark | — | 44.8% |
| LMArena Hard Prompts | 1399 | — |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- Nova Premier 1.0: 33.8 (#199)

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| Omni-MATH | — | 35% |
| LMArena Math | 1389 | — |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- Nova Premier 1.0: 35.8 (#180)

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| MMLU-Pro | — | 72.6% |
| GPQA (HELM) | — | 51.8% |
| LMArena Expert | 1397 | — |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- Nova Premier 1.0: —

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| 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)
- Nova Premier 1.0: 66.8 (#204)

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| IFEval | — | 80.3% |
| LMArena Instruction Following | 1378 | — |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- Nova Premier 1.0: —

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Longer Query | 1396 | — |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- Nova Premier 1.0: 51.0 (#178)

| Benchmark | GPT-5.3 Chat | Nova Premier 1.0 |
|---|---|---|
| LMArena Text | 1389 | — |
| LMArena Creative Writing | 1355 | — |
| EQ-Bench Creative Writing | 1690 | — |
| WildBench | — | 78.8% |
| LMArena Multi-Turn | 1412 | — |

## FAQ

### Is GPT-5.3 Chat better than Nova Premier 1.0?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 38.3 on the Noometry Index.

### Which is cheaper, GPT-5.3 Chat or Nova Premier 1.0?

GPT-5.3 Chat is cheaper. It lists at $1.75 per million input tokens and $14 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 128K.

### How many benchmarks do GPT-5.3 Chat and Nova Premier 1.0 share?

0 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Nova Premier 1.0 has 6.