# GPT-5.3 Chat vs Nova 2 Lite

> GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 39.7 on the Noometry Index. Nova 2 Lite costs 5.7× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/gpt-5-3-chat-vs-nova-2-lite
- Last updated: 2026-10-12
- Shared benchmarks: 17

## Summary

- They share 17 benchmarks with published results for both. GPT-5.3 Chat scores higher in 7 categories and Nova 2 Lite in 1 category; 5 gaps are clear of the uncertainty.
- The widest gap is in writing & preference, where GPT-5.3 Chat leads 63.1 to 53.9.
- Nova 2 Lite is cheaper at $0.30 / $2.50 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Chat.
- Nova 2 Lite accepts more context: 1M tokens versus 128K.

## Snapshot

| | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 42.8 | 39.7 |
| Rank | 109 | 161 |
| Context | 128K | 1M |
| Input $/M | $1.75 | $0.30 |
| Output $/M | $14 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.3 Chat: 41.4 (#124)
- Nova 2 Lite: 40.7 (#134)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Coding | 1408 | 1385 |

## Agentic & Tool Use

- GPT-5.3 Chat: —
- Nova 2 Lite: 24.1 (#121)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| Berkeley Function Calling Leaderboard | — | 27.1% |

## Reasoning

- GPT-5.3 Chat: 28.5 (#102)
- Nova 2 Lite: 27.5 (#118)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Hard Prompts | 1399 | 1364 |

## Math

- GPT-5.3 Chat: 38.2 (#142)
- Nova 2 Lite: 37.5 (#156)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Math | 1389 | 1359 |

## Knowledge

- GPT-5.3 Chat: 38.8 (#140)
- Nova 2 Lite: 43.0 (#94)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Expert | 1397 | 1358 |
| Vectara Hallucination Rate | — | 5.1% |

## Multilingual

- GPT-5.3 Chat: 50.3 (#124)
- Nova 2 Lite: 47.1 (#153)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Non-English | 1382 | 1337 |
| LMArena Chinese | 1432 | 1364 |
| LMArena French | 1397 | 1381 |
| LMArena German | 1384 | 1343 |
| LMArena Japanese | 1352 | 1271 |
| LMArena Korean | 1346 | 1284 |
| LMArena Russian | 1400 | 1343 |
| LMArena Spanish | 1371 | 1373 |

## Instruction Following

- GPT-5.3 Chat: 72.8 (#129)
- Nova 2 Lite: 70.5 (#161)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Instruction Following | 1378 | 1335 |

## Long Context

- GPT-5.3 Chat: 42.6 (#120)
- Nova 2 Lite: 40.6 (#150)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Longer Query | 1396 | 1335 |

## Writing & Preference

- GPT-5.3 Chat: 63.1 (#68)
- Nova 2 Lite: 53.9 (#154)

| Benchmark | GPT-5.3 Chat | Nova 2 Lite |
|---|---|---|
| LMArena Text | 1389 | 1362 |
| LMArena Creative Writing | 1355 | 1291 |
| LMArena Multi-Turn | 1412 | 1338 |
| EQ-Bench Creative Writing | 1690 | — |

## FAQ

### Is GPT-5.3 Chat better than Nova 2 Lite?

GPT-5.3 Chat is the stronger model overall, scoring 42.8 to 39.7 on the Noometry Index. Nova 2 Lite costs 5.7× less per token, which makes it the better buy when GPT-5.3 Chat's lead doesn't matter for your workload.

### Which is cheaper, GPT-5.3 Chat or Nova 2 Lite?

Nova 2 Lite is cheaper. It lists at $0.30 per million input tokens and $2.50 per million output tokens; GPT-5.3 Chat lists at $1.75 and $14.

### Is GPT-5.3 Chat or Nova 2 Lite better for coding?

They score almost the same on coding (41.4 vs 40.7); test both on your own repository before choosing.

### Which has the bigger context window?

Nova 2 Lite does, with 1M tokens against 128K.

### How many benchmarks do GPT-5.3 Chat and Nova 2 Lite share?

17 benchmarks have published results for both models. GPT-5.3 Chat has 18 scored results on Noometry and Nova 2 Lite has 19.