Model comparison
Gemma 4 26B A4B IT vs GPT-5 Pro
GPT-5 Pro is the stronger model overall, scoring 46.2 to 43.1 on the Noometry Index. Gemma 4 26B A4B IT costs 341× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Last verified . 2 shared benchmarks.
GoogleSummary
- They share 2 benchmarks with published results for both. Gemma 4 26B A4B IT scores higher in 0 categories and GPT-5 Pro in 4 categories; 4 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-5 Pro leads 39.2 to 21.1.
- The biggest single-benchmark swing is WeirdML: 35.2% for Gemma 4 26B A4B IT and 60.4% for GPT-5 Pro.
- Gemma 4 26B A4B IT is cheaper at $0.0765 / $0.26 per million input/output tokens, against $15 / $120 for GPT-5 Pro.
- GPT-5 Pro accepts more context: 400K tokens versus 262K.
- Gemma 4 26B A4B IT has downloadable open weights; the other is API-only.
Side by side
| Gemma 4 26B A4B IT | GPT-5 Pro | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 43.1 | 46.2 |
| Released | 2026-04-02 | 2025-10-06 |
| Weights | Open | Proprietary |
| Context window | 262K | 400K |
| Max output | 33K | 272K |
| Input $ / M tokens | $0.0765 | $15 |
| Output $ / M tokens | $0.26 | $120 |
| Results tracked | 28 | 12 |
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Category by category
Coding GPT-5 Pro leads
Gemma 4 26B A4B IT: 38.8 (#156), GPT-5 Pro: 43.4 (#77)
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| WeirdML | 35.2% | 60.4% |
| LMArena WebDev | 1359 | — |
| SciCode | 40% | — |
| LMArena Coding | 1446 | — |
| ALE-Bench | 927.17 | — |
| AlgoTune | — | 1.31 |
Reasoning GPT-5 Pro leads
Gemma 4 26B A4B IT: 21.1 (#205), GPT-5 Pro: 39.2 (#52)
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| Epoch Capabilities Index | 141.85 | 150.26 |
| ARC-AGI-2 | — | 18.3% |
| SimpleBench | — | 61.6% |
| Kagi LLM Benchmark | — | 76.8% |
| ARC-AGI-1 | — | 70.2% |
| CritPt | 0% | — |
| Chess Puzzles | 6% | — |
| EnigmaEval | — | 18.8% |
| LMArena Hard Prompts | 1438 | — |
| DTBench | 74.9% | — |
| LMCA | 29.7% | — |
Math GPT-5 Pro leads
Gemma 4 26B A4B IT: 45.7 (#61), GPT-5 Pro: 48.0 (#53)
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| FrontierMath (Tiers 1-3) | — | 55.8% |
| FrontierMath Tier 4 | — | 19.5% |
| OTIS Mock AIME 2024-2025 | 82.2% | — |
| LMArena Math | 1469 | — |
| FrontierMath Tier 4 (v1) | — | 14.6% |
Knowledge GPT-5 Pro leads
Gemma 4 26B A4B IT: 45.6 (#79), GPT-5 Pro: 56.2 (#39)
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| GPQA Diamond | 73.2% | — |
| Humanity's Last Exam | — | 31.6% |
| Vectara Hallucination Rate | 5.2% | — |
| LMArena Expert | 1447 | — |
Multimodal Not comparable
Gemma 4 26B A4B IT: 39.9 (#43), GPT-5 Pro: —
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| LMArena Vision | 1260 | — |
Multilingual Not comparable
Gemma 4 26B A4B IT: 53.3 (#68), GPT-5 Pro: —
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| LMArena Non-English | 1422 | — |
| LMArena Chinese | 1495 | — |
| LMArena French | 1459 | — |
| LMArena Russian | 1434 | — |
| LMArena Spanish | 1415 | — |
Instruction Following Not comparable
Gemma 4 26B A4B IT: 75.0 (#78), GPT-5 Pro: —
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| LMArena Instruction Following | 1420 | — |
Long Context Not comparable
Gemma 4 26B A4B IT: 43.6 (#87), GPT-5 Pro: —
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| LMArena Longer Query | 1427 | — |
Writing & Preference Not comparable
Gemma 4 26B A4B IT: 58.8 (#110), GPT-5 Pro: —
| Benchmark | Gemma 4 26B A4B IT | GPT-5 Pro |
|---|---|---|
| LMArena Text | 1434 | — |
| LMArena Creative Writing | 1401 | — |
| EQ-Bench Creative Writing | 1305 | — |
| LMArena Multi-Turn | 1442 | — |
Frequently asked questions
Is Gemma 4 26B A4B IT better than GPT-5 Pro?
GPT-5 Pro is the stronger model overall, scoring 46.2 to 43.1 on the Noometry Index. Gemma 4 26B A4B IT costs 341× less per token, which makes it the better buy when GPT-5 Pro's lead doesn't matter for your workload.
Which is cheaper, Gemma 4 26B A4B IT or GPT-5 Pro?
Gemma 4 26B A4B IT is cheaper. It lists at $0.0765 per million input tokens and $0.26 per million output tokens; GPT-5 Pro lists at $15 and $120.
Is Gemma 4 26B A4B IT or GPT-5 Pro better for coding?
GPT-5 Pro scores higher on coding benchmarks: 43.4 versus 38.8 in the Noometry coding category.
Which has the bigger context window?
GPT-5 Pro does, with 400K tokens against 262K.
How many benchmarks do Gemma 4 26B A4B IT and GPT-5 Pro share?
2 benchmarks have published results for both models. Gemma 4 26B A4B IT has 28 scored results on Noometry and GPT-5 Pro has 12.