Self-hosting and data control
Choose gpt-oss-120b
gpt-oss-120b has open weights, so you can run it on your own servers; Mistral Medium 3.1 is only available through its provider.
gpt-oss-120b vs Mistral Medium 3.1: price, context and capabilities
Choose gpt-oss-120b for self-hosting and data control; on the other points the two are level or the data is missing.
In short
- Mistral Medium 3.1 has been retired; gpt-oss-120b is the one you can still call.
- A price comparison is not possible: one of them has no comparable published price.
- Only gpt-oss-120b offers reasoning, tool calling, self-hostable.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Specifications side by side
| gpt-oss-120b | Mistral Medium 3.1 | |
|---|---|---|
| Provider | OpenAI | Mistral AI |
| Category | Language models | Language models |
| Status | Generally available | Retired |
| Headline price | No data | No data |
| Input | No data | No data |
| Output | No data | No data |
| Cached input | No data | No data |
| Context window | 131k | No data |
| Max output | 131k | No data |
| Released | August 2025 | August 2025 |
| Knowledge cutoff | June 2024 | No data |
| Licence | Open weights | Proprietary |
| Capabilities | Reasoning, Tool calling, Self-hostable | No data |
| API model id | gpt-oss-120b | mistral-medium-2508 |
Benchmarks side by side
Leader in bold.
| Benchmark | gpt-oss-120b | Mistral Medium 3.1 |
|---|---|---|
| Intelligence Index | 11.6 | No data |
| Terminal-Bench Hard | 23.5% | No data |
| SciCode | 34% | No data |
| GPQA Diamond | 78.2% | No data |
| Humanity's Last Exam | 19.6% | No data |
| IFBench (instruction following) | 69% | No data |
| τ²-Bench (agentic tool use) | 65.8% | No data |
| Long-context reasoning (AA-LCR) | 52% | No data |
Independent evaluations by Artificial Analysis, run the same way for every model, at the reasoning setting shown. Percentages unless marked as an index.
Frequently asked questions
Should I choose gpt-oss-120b or Mistral Medium 3.1?
Choose gpt-oss-120b for self-hosting and data control; on the other points the two are level or the data is missing.
Which is cheaper, gpt-oss-120b or Mistral Medium 3.1?
A price comparison is not possible: one of them has no comparable published price.
What is the difference between gpt-oss-120b and Mistral Medium 3.1?
gpt-oss-120b is made by OpenAI and Mistral Medium 3.1 by Mistral AI. Mistral Medium 3.1 has been retired; gpt-oss-120b is the one you can still call. A price comparison is not possible: one of them has no comparable published price. Only gpt-oss-120b offers reasoning, tool calling, self-hostable.