Self-hosting and data control
Choose gpt-oss-20b
gpt-oss-20b has open weights, so you can run it on your own servers; Devstral Medium 1.0 is only available through its provider.
Devstral Medium 1.0 vs gpt-oss-20b: price, context and capabilities
Choose gpt-oss-20b for self-hosting and data control and the latest release; on the other points the two are level or the data is missing.
In short
- Devstral Medium 1.0 has been retired; gpt-oss-20b is the one you can still call.
- A price comparison is not possible: one of them has no comparable published price.
- gpt-oss-20b is the newer model (August 2025, against July 2025).
- Only gpt-oss-20b offers reasoning, tool calling, self-hostable.
Which should you choose?
Each answer below comes straight from the published prices, specifications and independent benchmark results.
Latest release
Choose gpt-oss-20b
gpt-oss-20b is the newer release (August 2025, against July 2025 for Devstral Medium 1.0).
Specifications side by side
| Devstral Medium 1.0 | gpt-oss-20b | |
|---|---|---|
| Provider | Mistral AI | OpenAI |
| Category | Language models | Language models |
| Status | Retired | Generally available |
| Headline price | No data | No data |
| Input | No data | No data |
| Output | No data | No data |
| Cached input | No data | No data |
| Context window | No data | 131k |
| Max output | No data | 131k |
| Released | July 2025 | August 2025 |
| Knowledge cutoff | No data | June 2024 |
| Licence | Proprietary | Open weights |
| Capabilities | No data | Reasoning, Tool calling, Self-hostable |
| API model id | devstral-medium-2507 | gpt-oss-20b |
Benchmarks side by side
Leader in bold.
| Benchmark | Devstral Medium 1.0 | gpt-oss-20b |
|---|---|---|
| Intelligence Index | No data | 9 |
| Terminal-Bench Hard | No data | 10.6% |
| SciCode | No data | 38.9% |
| GPQA Diamond | No data | 68.8% |
| Humanity's Last Exam | No data | 11% |
| IFBench (instruction following) | No data | 65.1% |
| τ²-Bench (agentic tool use) | No data | 60.2% |
| Long-context reasoning (AA-LCR) | No data | 34.7% |
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 Devstral Medium 1.0 or gpt-oss-20b?
Choose gpt-oss-20b for self-hosting and data control and the latest release; on the other points the two are level or the data is missing.
Which is cheaper, Devstral Medium 1.0 or gpt-oss-20b?
A price comparison is not possible: one of them has no comparable published price.
What is the difference between Devstral Medium 1.0 and gpt-oss-20b?
Devstral Medium 1.0 is made by Mistral AI and gpt-oss-20b by OpenAI. Devstral Medium 1.0 has been retired; gpt-oss-20b is the one you can still call. A price comparison is not possible: one of them has no comparable published price. gpt-oss-20b is the newer model (August 2025, against July 2025). Only gpt-oss-20b offers reasoning, tool calling, self-hostable.
Which is newer, Devstral Medium 1.0 or gpt-oss-20b?
gpt-oss-20b was released on August 2025 and Devstral Medium 1.0 on July 2025.