gpt-oss-20b vs Mistral Medium 3.1 (Comparative Analysis)
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Comparative Analysis: gpt-oss-20b vs. Mistral Medium 3.1
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Overview
gpt-oss-20b was released 8 days before Mistral Medium 3.1.
 gpt-oss-20b |  Mistral Medium 3.1 | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | Mistral |
Input Context Window Maximum input tokens this model can process at once | 131.1K tokens | 131.1K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 131.1K tokens | Not specified tokens |
Release Date When this model first became publicly available | August 5, 2025 11 months ago August 5th, 2025 | August 13, 2025 11 months ago August 13th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | June 30, 2024 | June 30, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
gpt-oss-20b | Mistral Medium 3.1 | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝Text🖼️Image📁File |
Reasoning Controls Defaults and configurable reasoning effort | Always enabledEffort: High, Medium, LowDefault: Medium | Not reported |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | Mistral |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured OutputReasoning ModeContent Moderation |
Open Source Model availability | Available on HuggingFace → | Proprietary |
Pricing
gpt-oss-20b is roughly 0.07x less expensive compared to Mistral Medium 3.1 for input tokens and roughly 0.07x less expensive for output tokens.
| gpt-oss-20b | Mistral Medium 3.1 | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.03 per million tokens | $0.40 per million tokens |
Output Token Cost Cost per million output tokens | $0.13 per million tokens | $2.00 per million tokens |
Cache Read Cost Cost to reuse cached input tokens | $0.03 per million tokens | $0.04 per million tokens |
Benchmarks
Compare relevant benchmarks between gpt-oss-20b and Mistral Medium 3.1.
| gpt-oss-20b | Mistral Medium 3.1 | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 14.9 (Artificial Analysis index; higher is better) | 14.7 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | 20.7 (Artificial Analysis index; higher is better) | 20.5 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | 3.1 (Artificial Analysis index; higher is better) | 6.2 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | 972 Elo (#96 in Data Viz (39.7% win rate)) | 1,186 Elo (#55 in Data Viz (47.6% win rate)) |
At a Glance
Quick overview of what makes gpt-oss-20b and Mistral Medium 3.1 unique.
gpt-oss-20b by OpenAI can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 131.1K token context window. Very affordable at $0.03/M input and $0.13/M output tokens. Released August 5th, 2025.Mistral Medium 3.1 by Mistral understands both text and images, can use external tools and APIs, generates structured data. It can handle standard conversations with its 131.1K token context window. Reasonably priced at $0.40/M input and $2.00/M output tokens. Released August 13th, 2025.Explore More Comparisons
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