Compare · ModelsLive · 2 picked · head to head
o3 vs gpt-oss-20b (free)
Side by side · benchmarks, pricing, and signals you can act on.
Winner summary
o3 wins on 3/3 benchmarks
o3 wins 3 of 3 shared benchmarks. Leads in speed.
Category leads
speed·o3
Hype vs Reality
Attention vs performance
o3
#67 by perf·no signal
gpt-oss-20b (free)
#25 by perf·no signal
Vendor risk
Who is behind the model
OpenAI
$840.0B·Tier 1
OpenAI
$840.0B·Tier 1
Head to head
3 benchmarks · 2 models
o3gpt-oss-20b (free)
Artificial Analysis · Agentic Index
o3 leads by +8.5
o3
36.1
gpt-oss-20b (free)
27.6
Artificial Analysis · Coding Index
o3 leads by +19.9
o3
38.4
gpt-oss-20b (free)
18.5
Artificial Analysis · Quality Index
o3 leads by +13.9
o3
38.4
gpt-oss-20b (free)
24.5
Full benchmark table
| Benchmark | o3 | gpt-oss-20b (free) |
|---|---|---|
Artificial Analysis · Agentic Index | 36.1 | 27.6 |
Artificial Analysis · Coding Index | 38.4 | 18.5 |
Artificial Analysis · Quality Index | 38.4 | 24.5 |
Pricing · per 1M tokens · projected $/mo at 10M tokens
| Model | Input | Output | Context | Projected $/mo |
|---|---|---|---|---|
| o3 | $2.00 | $8.00 | 200K tokens (~100 books) | $35.00 |
| gpt-oss-20b (free) | $0.00 | $0.00 | 131K tokens (~66 books) | — |