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Compare
Side by side: capability scores, runtime measurements and every published price component. A value no source returned stays explicitly unavailable.
Choose two to four models, then compare their evidence.
Selected models 2 of 4
Exact source values, missing states, and pair-derived deltas stay separate.
Evidence key: ObservedUnavailable
| Capability | Claude Opus 5.5 | GPT-OSS 20B |
|---|---|---|
| Agentic | 65.3 | Unavailable |
| Coding | 87.5 | 43.1 |
| Knowledge | 85.4 | 27.4 |
| Reasoning | 86.1 | 48.8 |
| Multimodal & Grounded | 92.2 | Unavailable |
| Instruction Following | Unavailable | 79.2 |
| Math | 97.3 | Unavailable |
| Overall | 86.68 | 33.23 |
Time to first token and throughput, exactly as the runtime source published them.
Time to first token: latency to the first answer chunk (Artificial Analysis, via BenchLM). Reasoning models include thinking time, so values can run to tens or hundreds of seconds.
Source rates plus a labelled 75% input / 25% output blended cost.
| Metric | Claude Opus 5.5 | GPT-OSS 20B Self-hosted |
|---|---|---|
| Input / 1M | $4.00 | $0.018 |
| Output / 1M | $20.00 | $0.09 |
| Cache read / 1M | $0.20 | $0.009 |
| Cache write / 1M | $5.00 | Unavailable |
| Blended / 1M (75% input / 25% output) | $8.00 | $0.036 |
| Cost per successful task (LiveBench) | Unavailable | Unavailable |
| Time to first token | 573.15 s | 0.65 s |
| Throughput | 95 tok/s | 313 tok/s |
| Context window | 1M tokens | 128K tokens |
| Release date | 2026-09-22 | 2025-08-05 |
| Access | Proprietary | Open Weight |
1 of these rows is marked self-hosted by the source: open-weight models with no first-party hosted token rate. 1 of them shows a hosted rate matched from another provider; the rest report an unavailable price rather than zero.
Each row comes from the pair comparison source. A null basis or average stays unavailable rather than being inferred from the capability table.
The comparison source only publishes deltas for pairs it has evaluated. The capability and price tables above remain source-exact.