Model comparison
Seed 2.0 Pro vs GPT-5.2 Codex
Seed 2.0 Pro and GPT-5.2 Codex score almost the same on the Noometry Index (42.5 vs 42.2), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
ByteDance SeedSummary
- Seed 2.0 Pro is cheaper at $0.50 / $3 per million input/output tokens, against $1.75 / $14 for GPT-5.2 Codex.
- GPT-5.2 Codex accepts more context: 400K tokens versus 256K.
Side by side
| Seed 2.0 Pro | GPT-5.2 Codex | |
|---|---|---|
| Provider | ByteDance Seed | OpenAI |
| Noometry Index | 42.5 | 42.2 |
| Released | 2026-02-14 | 2025-12-18 |
| Weights | Proprietary | Proprietary |
| Context window | 256K | 400K |
| Max output | 128K | 128K |
| Input $ / M tokens | $0.50 | $1.75 |
| Output $ / M tokens | $3 | $14 |
| Results tracked | 20 | 5 |
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Category by category
Coding GPT-5.2 Codex leads
Seed 2.0 Pro: 42.9 (#84), GPT-5.2 Codex: 45.4 (#66)
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| SWE-bench Verified (bash only) | — | 72.8% |
| LMArena WebDev | — | 1339 |
| SWE-bench Multilingual | — | 66.3% |
| LMArena Coding | 1472 | — |
| ALE-Bench | — | 1,300 |
Agentic & Tool Use Not comparable
Seed 2.0 Pro: —, GPT-5.2 Codex: 40.7 (#20)
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| Terminal-Bench | — | 66.5% |
Reasoning Not comparable
Seed 2.0 Pro: 23.1 (#167), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| NYT Connections (extended) | 28.4% | — |
| Thematic Generalization | 57.1% | — |
| LMArena Hard Prompts | 1453 | — |
Math Not comparable
Seed 2.0 Pro: 36.5 (#110), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Math | 1440 | — |
Knowledge Not comparable
Seed 2.0 Pro: 39.6 (#119), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Expert | 1440 | — |
Multimodal Not comparable
Seed 2.0 Pro: 40.8 (#34), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Vision | 1275 | — |
Multilingual Not comparable
Seed 2.0 Pro: 54.8 (#37), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Non-English | 1442 | — |
| LMArena Chinese | 1490 | — |
| LMArena French | 1470 | — |
| LMArena German | 1443 | — |
| LMArena Japanese | 1408 | — |
| LMArena Korean | 1412 | — |
| LMArena Russian | 1450 | — |
| LMArena Spanish | 1460 | — |
Instruction Following Not comparable
Seed 2.0 Pro: 74.7 (#86), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Instruction Following | 1414 | — |
Long Context Not comparable
Seed 2.0 Pro: 43.6 (#85), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Longer Query | 1428 | — |
Writing & Preference Not comparable
Seed 2.0 Pro: 63.0 (#66), GPT-5.2 Codex: —
| Benchmark | Seed 2.0 Pro | GPT-5.2 Codex |
|---|---|---|
| LMArena Text | 1448 | — |
| LMArena Creative Writing | 1406 | — |
| LMArena Multi-Turn | 1441 | — |
Frequently asked questions
Is Seed 2.0 Pro better than GPT-5.2 Codex?
Seed 2.0 Pro and GPT-5.2 Codex score almost the same on the Noometry Index (42.5 vs 42.2), so choose on price, context window or the category you care about most.
Which is cheaper, Seed 2.0 Pro or GPT-5.2 Codex?
Seed 2.0 Pro is cheaper. It lists at $0.50 per million input tokens and $3 per million output tokens; GPT-5.2 Codex lists at $1.75 and $14.
Is Seed 2.0 Pro or GPT-5.2 Codex better for coding?
GPT-5.2 Codex scores higher on coding benchmarks: 45.4 versus 42.9 in the Noometry coding category.
Which has the bigger context window?
GPT-5.2 Codex does, with 400K tokens against 256K.
How many benchmarks do Seed 2.0 Pro and GPT-5.2 Codex share?
0 benchmarks have published results for both models. Seed 2.0 Pro has 20 scored results on Noometry and GPT-5.2 Codex has 5.