# Seed 2.0 Pro vs GPT-5.3 Codex

> GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 43.2 on the Noometry Index. Seed 2.0 Pro costs 4.3× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.

- Canonical page: https://noometry.com/compare/dola-seed-2-0-pro-vs-gpt-5-3-codex
- Last updated: 2026-10-12
- Shared benchmarks: 0

## Summary

- The widest gap is in coding, where GPT-5.3 Codex leads 48.6 to 43.5.
- Seed 2.0 Pro is cheaper at $0.50 / $3 per million input/output tokens, against $1.75 / $14 for GPT-5.3 Codex.
- GPT-5.3 Codex accepts more context: 400K tokens versus 256K.

## Snapshot

| | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Provider | ByteDance Seed | OpenAI |
| Noometry Index | 43.2 | 45.8 |
| Rank | 96 | 69 |
| Context | 256K | 400K |
| Input $/M | $0.50 | $1.75 |
| Output $/M | $3 | $14 |
| Weights | Proprietary | Proprietary |

## Coding

- Seed 2.0 Pro: 43.5 (#86)
- GPT-5.3 Codex: 48.6 (#56)

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| SWE-bench Verified | — | 74.8% |
| LMArena WebDev | — | 1409 |
| WeirdML | — | 79.3% |
| LMArena Coding | 1472 | — |
| ALE-Bench | — | 1,655 |

## Agentic & Tool Use

- Seed 2.0 Pro: —
- GPT-5.3 Codex: 48.0 (#9)

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| Terminal-Bench | — | 78.4% |
| METR Time Horizons | — | 74.5% |
| Vending-Bench 2 | — | 5,940 |

## Reasoning

- Seed 2.0 Pro: 24.1 (#165)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| NYT Connections (extended) | 28.4% | — |
| Thematic Generalization | 57.1% | — |
| LMArena Hard Prompts | 1453 | — |
| Epoch Capabilities Index | — | 156.77 |

## Math

- Seed 2.0 Pro: 39.3 (#108)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Math | 1439 | — |

## Knowledge

- Seed 2.0 Pro: 40.2 (#122)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Expert | 1440 | — |

## Multimodal

- Seed 2.0 Pro: 41.5 (#35)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Vision | 1274 | — |

## Multilingual

- Seed 2.0 Pro: 54.5 (#39)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Non-English | 1441 | — |
| LMArena Chinese | 1489 | — |
| LMArena French | 1471 | — |
| LMArena German | 1442 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1411 | — |
| LMArena Russian | 1449 | — |
| LMArena Spanish | 1460 | — |

## Instruction Following

- Seed 2.0 Pro: 74.5 (#91)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Instruction Following | 1414 | — |

## Long Context

- Seed 2.0 Pro: 43.6 (#90)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Longer Query | 1428 | — |

## Writing & Preference

- Seed 2.0 Pro: 62.9 (#69)
- GPT-5.3 Codex: —

| Benchmark | Seed 2.0 Pro | GPT-5.3 Codex |
|---|---|---|
| LMArena Text | 1448 | — |
| LMArena Creative Writing | 1406 | — |
| LMArena Multi-Turn | 1441 | — |

## FAQ

### Is Seed 2.0 Pro better than GPT-5.3 Codex?

GPT-5.3 Codex is the stronger model overall, scoring 45.8 to 43.2 on the Noometry Index. Seed 2.0 Pro costs 4.3× less per token, which makes it the better buy when GPT-5.3 Codex's lead doesn't matter for your workload.

### Which is cheaper, Seed 2.0 Pro or GPT-5.3 Codex?

Seed 2.0 Pro is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; GPT-5.3 Codex lists at $1.75 and $14.

### Is Seed 2.0 Pro or GPT-5.3 Codex better for coding?

GPT-5.3 Codex scores higher on coding benchmarks: 48.6 versus 43.5 in the Noometry coding category.

### Which has the bigger context window?

GPT-5.3 Codex does, with 400K tokens against 256K.

### How many benchmarks do Seed 2.0 Pro and GPT-5.3 Codex share?

0 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and GPT-5.3 Codex has 8.