# GPT-5.1-Codex vs Nova 2 Lite

> Nova 2 Lite is the stronger model overall, scoring 39.7 to 38.6 on the Noometry Index.

- Canonical page: https://noometry.com/compare/gpt-5-1-codex-vs-nova-2-lite
- Last updated: 2026-10-11
- Shared benchmarks: 0

## Summary

- The widest gap is in agentic & tool use, where GPT-5.1-Codex leads 38.0 to 24.1.
- Nova 2 Lite is cheaper at $0.30 / $2.50 per million input/output tokens, against $1.25 / $10 for GPT-5.1-Codex.
- Nova 2 Lite accepts more context: 1M tokens versus 400K.

## Snapshot

| | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| Provider | OpenAI | Amazon |
| Noometry Index | 38.6 | 39.7 |
| Rank | 186 | 161 |
| Context | 400K | 1M |
| Input $/M | $1.25 | $0.30 |
| Output $/M | $10 | $2.50 |
| Weights | Proprietary | Proprietary |

## Coding

- GPT-5.1-Codex: 41.9 (#116)
- Nova 2 Lite: 40.7 (#134)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1385 |
| ALE-Bench | 1,245 | — |

## Agentic & Tool Use

- GPT-5.1-Codex: 38.0 (#33)
- Nova 2 Lite: 24.1 (#121)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| Berkeley Function Calling Leaderboard | — | 27.1% |
| METR Time Horizons | 70.8% | — |

## Reasoning

- GPT-5.1-Codex: —
- Nova 2 Lite: 27.5 (#118)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| LMArena Hard Prompts | — | 1364 |

## Math

- GPT-5.1-Codex: 30.3 (#235)
- Nova 2 Lite: 37.5 (#156)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| ProofBench | 9% | — |
| LMArena Math | — | 1359 |

## Knowledge

- GPT-5.1-Codex: —
- Nova 2 Lite: 43.0 (#94)

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

## Multilingual

- GPT-5.1-Codex: —
- Nova 2 Lite: 47.1 (#153)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| LMArena Non-English | — | 1337 |
| LMArena Chinese | — | 1364 |
| LMArena French | — | 1381 |
| LMArena German | — | 1343 |
| LMArena Japanese | — | 1271 |
| LMArena Korean | — | 1284 |
| LMArena Russian | — | 1343 |
| LMArena Spanish | — | 1373 |

## Instruction Following

- GPT-5.1-Codex: —
- Nova 2 Lite: 70.5 (#161)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| LMArena Instruction Following | — | 1335 |

## Long Context

- GPT-5.1-Codex: —
- Nova 2 Lite: 40.6 (#150)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| LMArena Longer Query | — | 1335 |

## Writing & Preference

- GPT-5.1-Codex: —
- Nova 2 Lite: 53.9 (#154)

| Benchmark | GPT-5.1-Codex | Nova 2 Lite |
|---|---|---|
| LMArena Text | — | 1362 |
| LMArena Creative Writing | — | 1291 |
| LMArena Multi-Turn | — | 1338 |

## FAQ

### Is GPT-5.1-Codex better than Nova 2 Lite?

Nova 2 Lite is the stronger model overall, scoring 39.7 to 38.6 on the Noometry Index.

### Which is cheaper, GPT-5.1-Codex 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-5.1-Codex lists at $1.25 and $10.

### Is GPT-5.1-Codex or Nova 2 Lite better for coding?

GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 40.7 in the Noometry coding category.

### Which has the bigger context window?

Nova 2 Lite does, with 1M tokens against 400K.

### How many benchmarks do GPT-5.1-Codex and Nova 2 Lite share?

0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Nova 2 Lite has 19.