Model comparison
GPT-5.5 Pro vs Granite 4.0 Micro
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 28.8 on the Noometry Index. Granite 4.0 Micro costs 1656× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Last verified . 3 shared benchmarks.
Summary
- They share 3 benchmarks with published results for both. GPT-5.5 Pro scores higher in 3 categories and Granite 4.0 Micro in 0 categories; 3 gaps are clear of the uncertainty.
- The widest gap is in math, where GPT-5.5 Pro leads 83.8 to 11.2.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 100% for GPT-5.5 Pro and 2.8% for Granite 4.0 Micro.
- Granite 4.0 Micro is cheaper at $0.017 / $0.11 per million input/output tokens, against $30 / $180 for GPT-5.5 Pro.
- GPT-5.5 Pro accepts more context: 1.05M tokens versus 131K.
- Granite 4.0 Micro has downloadable open weights; the other is API-only.
Side by side
| GPT-5.5 Pro | Granite 4.0 Micro | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 64.3 | 28.8 |
| Released | 2026-04-23 | 2025-10-02 |
| Weights | Proprietary | Open |
| Context window | 1.05M | 131K |
| Max output | 128K | 118K |
| Input $ / M tokens | $30 | $0.017 |
| Output $ / M tokens | $180 | $0.11 |
| Results tracked | 14 | 8 |
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Category by category
Reasoning GPT-5.5 Pro leads
GPT-5.5 Pro: 73.6 (#7), Granite 4.0 Micro: 18.5 (#261)
| Benchmark | GPT-5.5 Pro | Granite 4.0 Micro |
|---|---|---|
| Chess Puzzles | 64% | 0% |
| ARC-AGI-2 | 84.6% | — |
| SimpleBench | 76.9% | — |
| ARC-AGI-1 | 96.5% | — |
| CritPt | 30.6% | — |
| DTBench | 96% | — |
| LMCA | 53.9% | — |
| Epoch Capabilities Index | 162.45 | — |
Math GPT-5.5 Pro leads
GPT-5.5 Pro: 83.8 (#8), Granite 4.0 Micro: 11.2 (#301)
| Benchmark | GPT-5.5 Pro | Granite 4.0 Micro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 100% | 2.8% |
| FrontierMath (Tiers 1-3) | 87.7% | — |
| FrontierMath Tier 4 | 78% | — |
| Omni-MATH | — | 20.9% |
| FrontierMath (Feb 2025 set) | 52.4% | — |
| FrontierMath Tier 4 (v1) | 39.6% | — |
Knowledge GPT-5.5 Pro leads
GPT-5.5 Pro: 64.2 (#17), Granite 4.0 Micro: 9.9 (#299)
| Benchmark | GPT-5.5 Pro | Granite 4.0 Micro |
|---|---|---|
| GPQA Diamond | 93.9% | 28.3% |
| MMLU-Pro | — | 39.5% |
| GPQA (HELM) | — | 30.7% |
Instruction Following Not comparable
GPT-5.5 Pro: —, Granite 4.0 Micro: 70.0 (#164)
| Benchmark | GPT-5.5 Pro | Granite 4.0 Micro |
|---|---|---|
| IFEval | — | 84.9% |
Writing & Preference Not comparable
GPT-5.5 Pro: —, Granite 4.0 Micro: 46.7 (#212)
| Benchmark | GPT-5.5 Pro | Granite 4.0 Micro |
|---|---|---|
| WildBench | — | 67% |
Frequently asked questions
Is GPT-5.5 Pro better than Granite 4.0 Micro?
GPT-5.5 Pro is the stronger model overall, scoring 64.3 to 28.8 on the Noometry Index. Granite 4.0 Micro costs 1656× less per token, which makes it the better buy when GPT-5.5 Pro's lead doesn't matter for your workload.
Which is cheaper, GPT-5.5 Pro or Granite 4.0 Micro?
Granite 4.0 Micro is cheaper. It lists at $0.017 per million input tokens and $0.11 per million output tokens; GPT-5.5 Pro lists at $30 and $180.
Which has the bigger context window?
GPT-5.5 Pro does, with 1.05M tokens against 131K.
How many benchmarks do GPT-5.5 Pro and Granite 4.0 Micro share?
3 benchmarks have published results for both models. GPT-5.5 Pro has 14 scored results on Noometry and Granite 4.0 Micro has 8.