Compare / head-to-head
GPT-5 Provsgpt-oss-120b
GPT-5 Pro leads 1 of 1 shared benchmark. GPT-5 Pro has the larger context window (400K tokens).
Benchmarks from cited public sources; pricing from official pages; status from official provider feeds.
Shared benchmarks
1 – 0
GPT-5 Pro leads
Cheaper per token
—
list price, input + output
Larger context
GPT-5 Pro
400K tokens
Provider uptime (30d)
94.2446%
OpenAI
GPT-5 Pro
OpenAI · released 2025-10-06
textvision
gpt-oss-120b
OpenAI · released 2025-08-05
text
- Context
- 131K
- Max out
- 131K
- Input /1M
- —
- Output /1M
- —
- Cached /1M
- —
- Scores
- 6 · 5 core
Quality
Benchmark matrix
1 shared · 2 only GPT-5 Pro · 4 only gpt-oss-120b| Benchmark | GPT-5 Pro | gpt-oss-120b | Δ | Edge |
|---|---|---|---|---|
| Reported by both · 1 | ||||
| GPQA Diamond | 88.4% ↗ | 80.1% ↗ | +8.3 pt | GPT-5 Pro |
| Only GPT-5 Pro reports · 2 | ||||
| FrontierMath Tier 4 v2 (Epoch AI run) | 19.5% ↗epoch | not reported | — | — |
| FrontierMath Tiers 1-3 v2 (Epoch AI run) | 55.8% ↗epoch | not reported | — | — |
| Only gpt-oss-120b reports · 4 | ||||
| SWE-bench Verified | not reported | 62.4% ↗ | — | — |
| AIME 2025 | not reported | 90% ↗matharena ⚠ | — | — |
| LMArena Elo | not reported | 1365.9 ↗ | — | — |
| OTIS Mock AIME 2024-2025 (Epoch AI run) | not reported | 88.9% ↗epoch | — | — |
Scores tagged "epoch" or "matharena" are independent runs, used only where the lab has not published its own; ⚠ marks rows MathArena flags as released after the competition. Higher is better on every row. Δ is GPT-5 Pro minus gpt-oss-120b in the benchmark's own unit. "Not reported" means the lab has not published that figure; it is not a zero. ↗ opens the source.
Specs & pricing
Side by side
Official pricing pages and model cards| Spec | GPT-5 Pro | gpt-oss-120b | Edge |
|---|---|---|---|
| Context window | 400K tokens | 131K tokens | GPT-5 Pro |
| Max output | 272K tokens | 131K tokens | GPT-5 Pro |
| Input price / 1M | $15 ↗ | — | — |
| Output price / 1M | $120 ↗ | — | — |
| Cached input / 1M | — | — | — |
| Input + output / 1M Lower is cheaper. List prices; batch, tool and regional fees excluded. | $135 | — | — |
| Modalities | text · vision | text | GPT-5 Pro |
| Released | 2025-10-06 | 2025-08-05 | — |
| Cited benchmark scores | 3 | 6 | — |
Reliability
OpenAI status
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gpt-oss-120b vs …
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Which one wins on your data?
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