Model comparison
GPT-5 Nano vs Granite 4.0 Micro
GPT-5 Nano is the stronger model overall, scoring 33.5 to 29.0 on the Noometry Index. Granite 4.0 Micro costs 3.4× less per token, which makes it the better buy when GPT-5 Nano's lead doesn't matter for your workload.
Last verified . 8 shared benchmarks.
Summary
- They share 8 benchmarks with published results for both. GPT-5 Nano scores higher in 3 categories and Granite 4.0 Micro in 2 categories; 5 gaps are clear of the uncertainty.
- The widest gap is in knowledge, where GPT-5 Nano leads 35.9 to 9.9.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 81.1% for GPT-5 Nano 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 $0.05 / $0.40 for GPT-5 Nano.
- GPT-5 Nano accepts more context: 400K tokens versus 131K.
- Granite 4.0 Micro has downloadable open weights; the other is API-only.
Side by side
| GPT-5 Nano | Granite 4.0 Micro | |
|---|---|---|
| Provider | OpenAI | IBM |
| Noometry Index | 33.5 | 29.0 |
| Released | 2025-08-07 | 2025-10-02 |
| Weights | Proprietary | Open |
| Context window | 400K | 131K |
| Max output | 128K | 118K |
| Input $ / M tokens | $0.05 | $0.017 |
| Output $ / M tokens | $0.40 | $0.11 |
| Results tracked | 49 | 8 |
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Category by category
Coding Not comparable
GPT-5 Nano: 33.6 (#254), Granite 4.0 Micro: —
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| SWE-bench Verified (bash only) | 34.8% | — |
| WeirdML | 38.1% | — |
| LMArena Coding | 1351 | — |
| ALE-Bench | 718.67 | — |
Agentic & Tool Use Not comparable
GPT-5 Nano: 25.8 (#106), Granite 4.0 Micro: —
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| Terminal-Bench | 21.8% | — |
| Berkeley Function Calling Leaderboard | 51.5% | — |
Reasoning Granite 4.0 Micro leads
GPT-5 Nano: 16.3 (#306), Granite 4.0 Micro: 19.2 (#265)
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| Chess Puzzles | 27% | 0% |
| ARC-AGI-2 | 2.6% | — |
| Kagi LLM Benchmark | 62.2% | — |
| ARC-AGI-1 | 20.7% | — |
| LMArena Hard Prompts | 1328 | — |
| Mystery Game Puzzles | 9% | — |
| DTBench | 62.7% | — |
| LMCA | 7.9% | — |
| Epoch Capabilities Index | 139.38 | — |
| ForecastBench | 59.1 | — |
Math GPT-5 Nano leads
GPT-5 Nano: 29.4 (#241), Granite 4.0 Micro: 12.0 (#307)
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 81.1% | 2.8% |
| Omni-MATH | 54.6% | 20.9% |
| FrontierMath (Tiers 1-3) | 20% | — |
| FrontierMath Tier 4 | 2.4% | — |
| ProofBench | 12% | — |
| LMArena Math | 1317 | — |
| MATH Level 5 | 95.2% | — |
| FrontierMath (Feb 2025 set) | 8.3% | — |
| FrontierMath Tier 4 (v1) | 2.1% | — |
Knowledge GPT-5 Nano leads
GPT-5 Nano: 35.9 (#178), Granite 4.0 Micro: 9.9 (#304)
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| GPQA Diamond | 69.4% | 28.3% |
| MMLU-Pro | 77.8% | 39.5% |
| GPQA (HELM) | 67.9% | 30.7% |
| SimpleQA Verified | 11.7% | — |
| Vectara Hallucination Rate | 10.5% | — |
| LMArena Expert | 1321 | — |
Multimodal Not comparable
GPT-5 Nano: 31.3 (#108), Granite 4.0 Micro: —
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| LMArena Vision | 1159 | — |
| VPCT | 37.2% | — |
Multilingual Not comparable
GPT-5 Nano: 45.3 (#172), Granite 4.0 Micro: —
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| LMArena Non-English | 1313 | — |
| LMArena Chinese | 1356 | — |
| LMArena German | 1327 | — |
| LMArena Japanese | 1226 | — |
| LMArena Korean | 1269 | — |
| LMArena Russian | 1296 | — |
| LMArena Spanish | 1360 | — |
Instruction Following GPT-5 Nano leads
GPT-5 Nano: 75.0 (#79), Granite 4.0 Micro: 69.9 (#169)
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| IFEval | 93.2% | 84.9% |
| LMArena Instruction Following | 1306 | — |
Long Context Not comparable
GPT-5 Nano: 31.3 (#281), Granite 4.0 Micro: —
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| Fiction.LiveBench | 44.4% | — |
| LMArena Longer Query | 1312 | — |
Writing & Preference Granite 4.0 Micro leads
GPT-5 Nano: 39.1 (#249), Granite 4.0 Micro: 46.7 (#216)
| Benchmark | GPT-5 Nano | Granite 4.0 Micro |
|---|---|---|
| WildBench | 80.6% | 67% |
| LMArena Text | 1320 | — |
| LMArena Creative Writing | 1249 | — |
| EQ-Bench Creative Writing | 705 | — |
| LMArena Multi-Turn | 1311 | — |
Frequently asked questions
Is GPT-5 Nano better than Granite 4.0 Micro?
GPT-5 Nano is the stronger model overall, scoring 33.5 to 29.0 on the Noometry Index. Granite 4.0 Micro costs 3.4× less per token, which makes it the better buy when GPT-5 Nano's lead doesn't matter for your workload.
Which is cheaper, GPT-5 Nano 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 Nano lists at $0.05 and $0.40.
Which has the bigger context window?
GPT-5 Nano does, with 400K tokens against 131K.
How many benchmarks do GPT-5 Nano and Granite 4.0 Micro share?
8 benchmarks have published results for both models. GPT-5 Nano has 49 scored results on Noometry and Granite 4.0 Micro has 8.