Quality
Known Good Index and the capability indices, side by side
Each index is min-max normalised across tracked models and scaled 0–100 from published evaluations. We do not run these evaluations.
| Metric | OpenAI: gpt-oss-120b | OpenAI: o3 |
|---|---|---|
| Known Good Index | 61 | 67 |
| Mathematics Index | 89 | 92 |
| Science Index | 77 | 84 |
| Reasoning Index | — | 62 |
| Agentic Index | 18 | 60 |
| Openness Index | 60 | 5 |
Quality Breakdown
Every evaluation both models report a published score for
Bar = OpenAI: gpt-oss-120b · marker = OpenAI: o3 · scores ingested from Epoch AI (CC-BY 4.0)
Right-hand figures read OpenAI: gpt-oss-120b / OpenAI: o3. OpenAI: gpt-oss-120b leads on 1 of 2, OpenAI: o3 on 1.
Arena Elo
Human preference rating from blind pairwise votes
Elo from blind pairwise votes, ingested from Arena. Higher is better.
| Metric | OpenAI: gpt-oss-120b | OpenAI: o3 |
|---|---|---|
| Text Arena | 1,366 | — |
| Text Arena (style controlled) | 1,352 | — |
Price & Cost
Published API pricing by token type
USD per 1M tokens. Blended is a 3:1 input:output mix. Live from OpenRouter, cross-checked against models.dev. Lower is better.
| Metric | OpenAI: gpt-oss-120b | OpenAI: o3 |
|---|---|---|
| Input $/1M | $0.04 | $2.00 |
| Output $/1M | $0.17 | $8.00 |
| Blended $/1M | $0.07 | $3.50 |
| Cache read $/1M | $0.015 | $0.500 |
Context Window
Maximum input accepted and maximum output emitted
Provider-declared limits, from metadata via models.dev and OpenRouter. Higher is better.
| Metric | OpenAI: gpt-oss-120b | OpenAI: o3 |
|---|---|---|
| Context window | 131k | 200k |
| Max output tokens | 131k | 100k |
Speed & Latency
Median throughput and time to first token across hosting providers
Medians across all tracked providers, derived from OpenRouter endpoint telemetry.
| Metric | OpenAI: gpt-oss-120b | OpenAI: o3 |
|---|---|---|
| Output tokens/s | 172 | 88 |
| Time to first token | 0.7s | 2.7s |
Providers
Which hosts serve each model, and at what price and speed
| Provider | OpenAI: gpt-oss-120b blended | OpenAI: gpt-oss-120b tok/s | OpenAI: o3 blended | OpenAI: o3 tok/s |
|---|---|---|---|---|
| Cerebras | $0.45 | 495 | — | — |
| Groq | $0.26 | 411 | — | — |
| SambaNova | $0.34 | 306 | — | — |
| BaseTen | $0.20 | 285 | — | — |
| Nebius | $0.26 | 281 | — | — |
| DeepInfra | $0.07 | 246 | — | — |
| Parasail | $0.26 | 207 | — | — |
| Mara | $0.30 | 181 | — | — |
| Amazon Bedrock · first party | $0.26 | 166 | — | — |
| Together | $0.26 | 111 | — | — |
| Google · first party | $0.16 | 85 | — | — |
| Phala | $0.26 | 82 | — | — |
| DigitalOcean | $0.17 | 62 | — | — |
| Novita | $0.10 | 42 | — | — |
| CoreWeave | $0.07 | 41 | — | — |
| Mancer 2 | $0.17 | 41 | — | — |
| SiliconFlow | $0.15 | 26 | — | — |
| OpenAI · first party | — | — | $3.50 | 72 |
Per-host pricing and telemetry from OpenRouter. A dash means that host does not serve that model.