Model comparison
GPT-5.2 Codex vs Granite 4.2 30b
GPT-5.2 Codex and Granite 4.2 30b score almost the same on the Noometry Index (42.6 vs 41.8), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in coding, where GPT-5.2 Codex leads 45.5 to 41.0.
- Granite 4.2 30b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.2 Codex | Granite 4.2 30b | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 42.6 | 41.8 |
| Released | 2025-12-18 | — |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.75 | — |
| Output $ / M tokens | $14 | — |
| Results tracked | 5 | 11 |
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Category by category
Coding GPT-5.2 Codex leads
GPT-5.2 Codex: 45.5 (#71), Granite 4.2 30b: 41.0 (#126)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| SWE-bench Verified (bash only) | 72.8% | — |
| LMArena WebDev | 1339 | — |
| SWE-bench Multilingual | 66.3% | — |
| LMArena Coding | — | 1396 |
| ALE-Bench | 1,300 | — |
Agentic & Tool Use Not comparable
GPT-5.2 Codex: 41.0 (#22), Granite 4.2 30b: —
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| Terminal-Bench | 66.5% | — |
Reasoning Not comparable
GPT-5.2 Codex: —, Granite 4.2 30b: 27.8 (#112)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| LMArena Hard Prompts | — | 1374 |
Knowledge Not comparable
GPT-5.2 Codex: —, Granite 4.2 30b: 39.1 (#138)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| LMArena Expert | — | 1406 |
Multilingual Not comparable
GPT-5.2 Codex: —, Granite 4.2 30b: 47.3 (#151)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| LMArena Non-English | — | 1340 |
| LMArena Chinese | — | 1414 |
| LMArena Russian | — | 1343 |
Instruction Following Not comparable
GPT-5.2 Codex: —, Granite 4.2 30b: 71.2 (#155)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| LMArena Instruction Following | — | 1347 |
Long Context Not comparable
GPT-5.2 Codex: —, Granite 4.2 30b: 41.4 (#140)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| LMArena Longer Query | — | 1359 |
Writing & Preference Not comparable
GPT-5.2 Codex: —, Granite 4.2 30b: 53.8 (#156)
| Benchmark | GPT-5.2 Codex | Granite 4.2 30b |
|---|---|---|
| LMArena Text | — | 1361 |
| LMArena Creative Writing | — | 1288 |
| LMArena Multi-Turn | — | 1339 |
Frequently asked questions
Is GPT-5.2 Codex better than Granite 4.2 30b?
GPT-5.2 Codex and Granite 4.2 30b score almost the same on the Noometry Index (42.6 vs 41.8), so choose on price, context window or the category you care about most.
Is GPT-5.2 Codex or Granite 4.2 30b better for coding?
GPT-5.2 Codex scores higher on coding benchmarks: 45.5 versus 41.0 in the Noometry coding category.
How many benchmarks do GPT-5.2 Codex and Granite 4.2 30b share?
0 benchmarks have published results for both models. GPT-5.2 Codex has 5 scored results on Noometry and Granite 4.2 30b has 11.