Model comparison
Gemma 3 27B vs GPT-6 Astra
GPT-6 Astra is the stronger model overall, scoring 70.8 to 30.8 on the Noometry Index. Gemma 3 27B costs 200× less per token, which makes it the better buy when GPT-6 Astra's lead doesn't matter for your workload.
Last verified . 28 shared benchmarks.
GoogleSummary
- They share 28 benchmarks with published results for both. Gemma 3 27B scores higher in 0 categories and GPT-6 Astra in 10 categories; 10 gaps are clear of the uncertainty.
- The widest gap is in reasoning, where GPT-6 Astra leads 85.1 to 16.7.
- The biggest single-benchmark swing is OTIS Mock AIME 2024-2025: 22.5% for Gemma 3 27B and 100% for GPT-6 Astra.
- Gemma 3 27B is cheaper at $0.08 / $0.16 per million input/output tokens, against $10 / $50 for GPT-6 Astra.
- GPT-6 Astra accepts more context: 1.05M tokens versus 131K.
- Gemma 3 27B has downloadable open weights; the other is API-only.
Side by side
| Gemma 3 27B | GPT-6 Astra | |
|---|---|---|
| Provider | OpenAI | |
| Noometry Index | 30.8 | 70.8 |
| Released | 2025-03-11 | 2026-09-03 |
| Weights | Open | Proprietary |
| Context window | 131K | 1.05M |
| Max output | 8K | 128K |
| Input $ / M tokens | $0.08 | $10 |
| Output $ / M tokens | $0.16 | $50 |
| Results tracked | 43 | 56 |
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Category by category
Coding GPT-6 Astra leads
Gemma 3 27B: 22.5 (#334), GPT-6 Astra: 73.7 (#2)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| SciCode | 21.2% | 56.5% |
| LMArena Coding | 1322 | 1487 |
| DeepSWE | — | 74.1% |
| FrontierCode | — | 53.3% |
| Aider Polyglot | 4.9% | — |
| LMArena WebDev | — | 1786 |
| FrontierSWE | — | 65.5% |
| GSO | — | 79.4% |
| WeirdML | — | 93.6% |
| LiveBench Coding | 39.9% | — |
| MirrorCode | — | 46.7% |
| ALE-Bench | — | 2,951 |
Agentic & Tool Use GPT-6 Astra leads
Gemma 3 27B: 25.1 (#110), GPT-6 Astra: 52.9 (#3)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| APEX-Agents | — | 64.7% |
| Berkeley Function Calling Leaderboard | 29.5% | — |
| Remote Labor Index | — | 20.8% |
| BALROG | — | 68.3% |
| GDP.pdf | — | 34.2% |
| Vending-Bench 2 | — | 15,515 |
Reasoning GPT-6 Astra leads
Gemma 3 27B: 16.7 (#301), GPT-6 Astra: 85.1 (#1)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| CritPt | 0% | 31.7% |
| Chess Puzzles | 0% | 72% |
| LMArena Hard Prompts | 1340 | 1462 |
| DTBench | 52.5% | 97.3% |
| LMCA | 12.3% | 64.4% |
| Epoch Capabilities Index | 130.04 | 166.45 |
| ARC-AGI-2 | — | 95% |
| Kagi LLM Benchmark | 40.4% | — |
| NYT Connections (extended) | — | 98.1% |
| ARC-AGI-1 | — | 98.5% |
| EBR-Bench | — | 76.2% |
| LiveBench Reasoning | 43.8% | — |
| Mystery Game Puzzles | — | 84% |
| LiveBench Data Analysis | 51.5% | — |
| Bench to the Future 3 | — | 0.14 |
| LiveBench | 50% | — |
Math GPT-6 Astra leads
Gemma 3 27B: 25.9 (#265), GPT-6 Astra: 93.5 (#2)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| OTIS Mock AIME 2024-2025 | 22.5% | 100% |
| LMArena Math | 1312 | 1465 |
| FrontierMath (Tiers 1-3) | — | 93.7% |
| FrontierMath Tier 4 | — | 97.6% |
| ProofBench | — | 99% |
| LiveBench Math | 55.4% | — |
| MATH Level 5 | 74% | — |
| FrontierMath Erdős | — | 2.9% |
Knowledge GPT-6 Astra leads
Gemma 3 27B: 25.5 (#261), GPT-6 Astra: 75.3 (#1)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| GPQA Diamond | 47.7% | 95.8% |
| Vectara Hallucination Rate | 7.4% | 8.7% |
| LMArena Expert | 1304 | 1483 |
| Humanity's Last Exam | — | 54.8% |
| SimpleQA Verified | — | 75.6% |
| Confabulations | 40.3% | — |
Multimodal GPT-6 Astra leads
Gemma 3 27B: 32.6 (#100), GPT-6 Astra: 55.0 (#3)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| LMArena Vision | 1164 | 1281 |
| GeoBench | 52% | — |
| Blueprint-Bench 2 | — | 49.7% |
| Furniture Assembly | — | 80% |
| LMArena Document | — | 1468 |
Multilingual GPT-6 Astra leads
Gemma 3 27B: 46.9 (#155), GPT-6 Astra: 53.7 (#61)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| LMArena Non-English | 1334 | 1430 |
| LMArena Chinese | 1346 | 1484 |
| LMArena French | 1368 | 1456 |
| LMArena German | 1362 | 1440 |
| LMArena Japanese | 1287 | 1379 |
| LMArena Korean | 1308 | 1426 |
| LMArena Russian | 1349 | 1436 |
| LMArena Spanish | 1349 | 1407 |
Instruction Following GPT-6 Astra leads
Gemma 3 27B: 70.6 (#160), GPT-6 Astra: 76.3 (#44)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| LMArena Instruction Following | 1321 | 1450 |
| LiveBench Instruction Following | 74.9% | — |
Long Context GPT-6 Astra leads
Gemma 3 27B: 27.6 (#293), GPT-6 Astra: 44.5 (#62)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| LMArena Longer Query | 1333 | 1456 |
| Fiction.LiveBench | 33.3% | — |
Writing & Preference GPT-6 Astra leads
Gemma 3 27B: 52.5 (#168), GPT-6 Astra: 75.3 (#7)
| Benchmark | Gemma 3 27B | GPT-6 Astra |
|---|---|---|
| LMArena Text | 1358 | 1441 |
| LMArena Creative Writing | 1346 | 1418 |
| EQ-Bench Creative Writing | 1266 | 2173 |
| LMArena Multi-Turn | 1345 | 1448 |
| Short-Story Creative Writing | 79.9% | — |
| LiveBench Language | 34.6% | — |
Frequently asked questions
Is Gemma 3 27B better than GPT-6 Astra?
GPT-6 Astra is the stronger model overall, scoring 70.8 to 30.8 on the Noometry Index. Gemma 3 27B costs 200× less per token, which makes it the better buy when GPT-6 Astra's lead doesn't matter for your workload.
Which is cheaper, Gemma 3 27B or GPT-6 Astra?
Gemma 3 27B is cheaper. It lists at $0.08 per million input tokens and $0.16 per million output tokens; GPT-6 Astra lists at $10 and $50.
Is Gemma 3 27B or GPT-6 Astra better for coding?
GPT-6 Astra scores higher on coding benchmarks: 73.7 versus 22.5 in the Noometry coding category.
Which has the bigger context window?
GPT-6 Astra does, with 1.05M tokens against 131K.
How many benchmarks do Gemma 3 27B and GPT-6 Astra share?
28 benchmarks have published results for both models. Gemma 3 27B has 43 scored results on Noometry and GPT-6 Astra has 56.