Model comparison
GPT-5.2 Pro vs Granite 4.2 8B
GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 40.0 on the Noometry Index. Granite 4.2 8B costs 537× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Last verified . 0 shared benchmarks.
Summary
- The widest gap is in reasoning, where GPT-5.2 Pro leads 51.8 to 25.5.
- Granite 4.2 8B is cheaper at $0.06 / $0.25 per million input/output tokens, against $21 / $168 for GPT-5.2 Pro.
- GPT-5.2 Pro accepts more context: 400K tokens versus 131K.
- Granite 4.2 8B has downloadable open weights; the other is API-only.
Side by side
| GPT-5.2 Pro | Granite 4.2 8B | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 52.2 | 40.0 |
| Released | 2025-12-11 | — |
| Weights | Proprietary | Open |
| Context window | 400K | 131K |
| Max output | 128K | 118K |
| Input $ / M tokens | $21 | $0.06 |
| Output $ / M tokens | $168 | $0.25 |
| Results tracked | 8 | 11 |
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Category by category
Coding Not comparable
GPT-5.2 Pro: —, Granite 4.2 8B: 39.9 (#138)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| LMArena Coding | — | 1379 |
Reasoning GPT-5.2 Pro leads
GPT-5.2 Pro: 51.8 (#31), Granite 4.2 8B: 25.5 (#130)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| ARC-AGI-2 | 54.2% | — |
| SimpleBench | 57.4% | — |
| NYT Connections (extended) | 79.3% | — |
| ARC-AGI-1 | 90.5% | — |
| LMArena Hard Prompts | — | 1327 |
| Epoch Capabilities Index | 155.41 | — |
Math Not comparable
GPT-5.2 Pro: 64.8 (#23), Granite 4.2 8B: —
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| FrontierMath (Tiers 1-3) | 74% | — |
| FrontierMath Tier 4 | 46% | — |
| FrontierMath Tier 4 (v1) | 31.3% | — |
Knowledge Not comparable
GPT-5.2 Pro: —, Granite 4.2 8B: 37.7 (#144)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| LMArena Expert | — | 1380 |
Multilingual Not comparable
GPT-5.2 Pro: —, Granite 4.2 8B: 44.5 (#173)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| LMArena Non-English | — | 1299 |
| LMArena Chinese | — | 1361 |
| LMArena Russian | — | 1283 |
Instruction Following Not comparable
GPT-5.2 Pro: —, Granite 4.2 8B: 68.7 (#183)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| LMArena Instruction Following | — | 1298 |
Long Context Not comparable
GPT-5.2 Pro: —, Granite 4.2 8B: 40.2 (#154)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| LMArena Longer Query | — | 1323 |
Writing & Preference Not comparable
GPT-5.2 Pro: —, Granite 4.2 8B: 49.8 (#183)
| Benchmark | GPT-5.2 Pro | Granite 4.2 8B |
|---|---|---|
| LMArena Text | — | 1319 |
| LMArena Creative Writing | — | 1238 |
| LMArena Multi-Turn | — | 1299 |
Frequently asked questions
Is GPT-5.2 Pro better than Granite 4.2 8B?
GPT-5.2 Pro is the stronger model overall, scoring 52.2 to 40.0 on the Noometry Index. Granite 4.2 8B costs 537× less per token, which makes it the better buy when GPT-5.2 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.2 Pro or Granite 4.2 8B?
Granite 4.2 8B is cheaper. It lists at $0.06 per million input tokens and $0.25 per million output tokens; GPT-5.2 Pro lists at $21 and $168.
Which has the bigger context window?
GPT-5.2 Pro does, with 400K tokens against 131K.
How many benchmarks do GPT-5.2 Pro and Granite 4.2 8B share?
0 benchmarks have published results for both models. GPT-5.2 Pro has 8 scored results on Noometry and Granite 4.2 8B has 11.