gpt-oss-120b vs Mistral Medium 3 (Comparative Analysis)
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Comparative Analysis: gpt-oss-120b vs. Mistral Medium 3
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Overview
Mistral Medium 3 was released 3 months before gpt-oss-120b.
 gpt-oss-120b |  Mistral Medium 3 | |
|---|---|---|
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 | May 7, 2025 1 year ago May 7th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | June 30, 2024 | March 31, 2025 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
gpt-oss-120b | Mistral Medium 3 | |
|---|---|---|
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-120b is roughly 0.10x less expensive compared to Mistral Medium 3 for input tokens and roughly 0.09x less expensive for output tokens.
| gpt-oss-120b | Mistral Medium 3 | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.04 per million tokens | $0.40 per million tokens |
Output Token Cost Cost per million output tokens | $0.17 per million tokens | $2.00 per million tokens |
Cache Read Cost Cost to reuse cached input tokens | Not specified | $0.04 per million tokens |
Benchmarks
Compare relevant benchmarks between gpt-oss-120b and Mistral Medium 3.
| gpt-oss-120b | Mistral Medium 3 | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 23.8 (Artificial Analysis index; higher is better) | Benchmark not available. |
Coding Index Programming performance across independent evaluations | 30.4 (Artificial Analysis index; higher is better) | Benchmark not available. |
Agentic Index Ability to complete multi-step agentic tasks | 13.2 (Artificial Analysis index; higher is better) | Benchmark not available. |
Best Design Arena Score Highest human-preference Elo score across design arenas | 1,050 Elo (#91 in Game Dev (40.6% win rate)) | 1,140 Elo (#65 in 3D (54.6% win rate)) |
At a Glance
Quick overview of what makes gpt-oss-120b and Mistral Medium 3 unique.
gpt-oss-120b 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 $0.04/M input and $0.17/M output tokens. Released August 5th, 2025.Mistral Medium 3 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 May 7th, 2025.Explore More Comparisons
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