Compare · ModelsLive · 2 picked · head to head
gpt-oss-20b vs o1-preview
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
o1-preview wins on 1/1 benchmarks
o1-preview wins 1 of 1 shared benchmarks. Leads in arena.
Category leads
arena·o1-preview
Hype vs Reality
Attention vs performance
gpt-oss-20b
#29 by perf·no signal
o1-preview
#166 by perf·no signal
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
1 benchmark · 2 models
gpt-oss-20bo1-preview
Chatbot Arena Elo · Overall
o1-preview leads by +70.7
gpt-oss-20b
1317.6
o1-preview
1388.3
Full benchmark table
| Benchmark | gpt-oss-20b | o1-preview |
|---|---|---|
Chatbot Arena Elo · Overall | 1317.6 | 1388.3 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| $0.03 | $0.14 | 131K tokens (~66 books) | $0.57 | |
| — | — | — | — |