gpt-oss-20b vs o4 Mini High (Comparative Analysis)
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Comparative Analysis: gpt-oss-20b vs. o4 Mini High
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Overview
o4 Mini High was released 3 months before gpt-oss-20b.
 gpt-oss-20b | o4 Mini High | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 131.1K tokens | 200K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 131.1K tokens | 100K tokens |
Release Date When this model first became publicly available | August 5, 2025 11 months ago August 5th, 2025 | April 16, 2025 1 year ago April 16th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | June 30, 2024 | June 30, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
gpt-oss-20b | o4 Mini High | |
|---|---|---|
Input Types Supported input formats | 📝Text | 🖼️Image📝Text📁File |
Reasoning Controls Defaults and configurable reasoning effort | Always enabledEffort: High, Medium, LowDefault: Medium | Always enabledEffort: HighDefault: High |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning Mode✓Content Moderation |
Open Source Model availability | Available on HuggingFace → | Proprietary |
Pricing
gpt-oss-20b is roughly 0.03x less expensive compared to o4 Mini High for input tokens and roughly 0.03x less expensive for output tokens.
| gpt-oss-20b | o4 Mini High | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.03 per million tokens | $1.10 per million tokens |
Output Token Cost Cost per million output tokens | $0.13 per million tokens | $4.40 per million tokens |
Web Search Cost Additional cost for each web search operation | Not specified | $0.01 per search |
Cache Read Cost Cost to reuse cached input tokens | $0.03 per million tokens | $0.28 per million tokens |
Benchmarks
Compare relevant benchmarks between gpt-oss-20b and o4 Mini High.
| gpt-oss-20b | o4 Mini High | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | 14.9 (Artificial Analysis index; higher is better) | Benchmark not available. |
Coding Index Programming performance across independent evaluations | 20.7 (Artificial Analysis index; higher is better) | Benchmark not available. |
Agentic Index Ability to complete multi-step agentic tasks | 3.1 (Artificial Analysis index; higher is better) | Benchmark not available. |
Best Design Arena Score Highest human-preference Elo score across design arenas | 970 Elo (#98 in Data Viz (39.7% win rate)) | Benchmark not available. |
At a Glance
Quick overview of what makes gpt-oss-20b and o4 Mini High 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.o4 Mini High by OpenAI understands both text and images, can use external tools and APIs, offers advanced reasoning, generates structured data. It can handle standard conversations with its 200K token context window. Reasonably priced at $1.10/M input and $4.40/M output tokens. Includes built-in content moderation for safer outputs. Released April 16th, 2025.Explore More Comparisons
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Compare o4 Mini High with:
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Content creation and marketing tasks
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Technical analysis and explanations
🔬Science
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