Compare · ModelsLive · 2 picked · head to head
Gemini 2.5 Pro vs gpt-oss-20b (free)
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
Gemini 2.5 Pro wins on 9/9 benchmarks
Gemini 2.5 Pro wins 9 of 9 shared benchmarks. Leads in speed · math · knowledge.
Category leads
speed·Gemini 2.5 Promath·Gemini 2.5 Proknowledge·Gemini 2.5 Prolanguage·Gemini 2.5 Procoding·Gemini 2.5 Pro
Hype vs Reality
Attention vs performance
Gemini 2.5 Pro
#59 by perf·no signal
gpt-oss-20b (free)
#25 by perf·no signal
Vendor risk
Who is behind the model
Google DeepMind
$4.00T·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
9 benchmarks · 2 models
Gemini 2.5 Progpt-oss-20b (free)
Artificial Analysis · Agentic Index
Gemini 2.5 Pro leads by +5.1
Gemini 2.5 Pro
32.7
gpt-oss-20b (free)
27.6
Artificial Analysis · Coding Index
Gemini 2.5 Pro leads by +13.4
Gemini 2.5 Pro
31.9
gpt-oss-20b (free)
18.5
Artificial Analysis · Quality Index
Gemini 2.5 Pro leads by +10.2
Gemini 2.5 Pro
34.6
gpt-oss-20b (free)
24.5
OpenCompass · AIME2025
Gemini 2.5 Pro leads by +0.8
Gemini 2.5 Pro
88.7
gpt-oss-20b (free)
87.9
OpenCompass · GPQA-Diamond
Gemini 2.5 Pro leads by +15.8
Gemini 2.5 Pro
84.7
gpt-oss-20b (free)
68.9
OpenCompass · HLE
Gemini 2.5 Pro leads by +9.5
Gemini 2.5 Pro
21.1
gpt-oss-20b (free)
11.6
OpenCompass · IFEval
Gemini 2.5 Pro leads by +1.1
Gemini 2.5 Pro
90.0
gpt-oss-20b (free)
88.9
OpenCompass · LiveCodeBenchV6
Gemini 2.5 Pro leads by +2.9
Gemini 2.5 Pro
71.3
gpt-oss-20b (free)
68.4
OpenCompass · MMLU-Pro
Gemini 2.5 Pro leads by +13.0
Gemini 2.5 Pro
85.8
gpt-oss-20b (free)
72.8
Full benchmark table
| Benchmark | Gemini 2.5 Pro | gpt-oss-20b (free) |
|---|---|---|
Artificial Analysis · Agentic Index | 32.7 | 27.6 |
Artificial Analysis · Coding Index | 31.9 | 18.5 |
Artificial Analysis · Quality Index | 34.6 | 24.5 |
OpenCompass · AIME2025 | 88.7 | 87.9 |
OpenCompass · GPQA-Diamond | 84.7 | 68.9 |
OpenCompass · HLE | 21.1 | 11.6 |
OpenCompass · IFEval | 90.0 | 88.9 |
OpenCompass · LiveCodeBenchV6 | 71.3 | 68.4 |
OpenCompass · MMLU-Pro | 85.8 | 72.8 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| Gemini 2.5 Pro | $1.25 | $10.00 | 1.0M tokens (~524 books) | $34.38 |
| gpt-oss-20b (free) | $0.00 | $0.00 | 131K tokens (~66 books) | — |