Model comparison
GPT-5.1-Codex vs Granite 4.2 3b
GPT-5.1-Codex and Granite 4.2 3b score almost the same on the Noometry Index (38.6 vs 39.4), so choose on price, context window or the category you care about most.
Last verified . 0 shared benchmarks.
Summary
- Granite 4.2 3b has downloadable open weights; the other is API-only.
Side by side
| GPT-5.1-Codex | Granite 4.2 3b | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 38.6 | 39.4 |
| Released | 2025-11-12 | — |
| Weights | Proprietary | Open |
| Context window | 400K | — |
| Max output | 128K | — |
| Input $ / M tokens | $1.25 | — |
| Output $ / M tokens | $10 | — |
| Results tracked | 6 | 11 |
Sponsored placements are available on pages like this one. Advertise on Noometry
Category by category
Coding GPT-5.1-Codex leads
GPT-5.1-Codex: 41.9 (#116), Granite 4.2 3b: 40.0 (#151)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| SWE-bench Verified (bash only) | 66% | — |
| LMArena WebDev | 1337 | — |
| LMArena Coding | — | 1361 |
| ALE-Bench | 1,245 | — |
Agentic & Tool Use Not comparable
GPT-5.1-Codex: 38.0 (#33), Granite 4.2 3b: —
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| Terminal-Bench | 60.4% | — |
| METR Time Horizons | 70.8% | — |
Reasoning Not comparable
GPT-5.1-Codex: —, Granite 4.2 3b: 26.0 (#138)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| LMArena Hard Prompts | — | 1306 |
Math Not comparable
GPT-5.1-Codex: 30.3 (#235), Granite 4.2 3b: —
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| ProofBench | 9% | — |
Knowledge Not comparable
GPT-5.1-Codex: —, Granite 4.2 3b: 36.3 (#171)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| LMArena Expert | — | 1315 |
Multilingual Not comparable
GPT-5.1-Codex: —, Granite 4.2 3b: 42.1 (#198)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| LMArena Non-English | — | 1268 |
| LMArena Chinese | — | 1269 |
| LMArena Russian | — | 1249 |
Instruction Following Not comparable
GPT-5.1-Codex: —, Granite 4.2 3b: 67.1 (#200)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| LMArena Instruction Following | — | 1273 |
Long Context Not comparable
GPT-5.1-Codex: —, Granite 4.2 3b: 39.2 (#185)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| LMArena Longer Query | — | 1291 |
Writing & Preference Not comparable
GPT-5.1-Codex: —, Granite 4.2 3b: 47.2 (#212)
| Benchmark | GPT-5.1-Codex | Granite 4.2 3b |
|---|---|---|
| LMArena Text | — | 1293 |
| LMArena Creative Writing | — | 1205 |
| LMArena Multi-Turn | — | 1290 |
Frequently asked questions
Is GPT-5.1-Codex better than Granite 4.2 3b?
GPT-5.1-Codex and Granite 4.2 3b score almost the same on the Noometry Index (38.6 vs 39.4), so choose on price, context window or the category you care about most.
Is GPT-5.1-Codex or Granite 4.2 3b better for coding?
GPT-5.1-Codex scores higher on coding benchmarks: 41.9 versus 40.0 in the Noometry coding category.
How many benchmarks do GPT-5.1-Codex and Granite 4.2 3b share?
0 benchmarks have published results for both models. GPT-5.1-Codex has 6 scored results on Noometry and Granite 4.2 3b has 11.