GPT-4 vs gpt-oss-20b (Comparative Analysis)
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Comparative Analysis: GPT-4 vs. gpt-oss-20b
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Overview
GPT-4 was released 2 years before gpt-oss-20b.
 GPT-4 | gpt-oss-20b | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 8.2K tokens | 131.1K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 4.1K tokens | 131.1K tokens |
Release Date When this model first became publicly available | May 28, 2023 3 years ago May 28th, 2023 | August 5, 2025 11 months ago August 5th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | September 30, 2021 | June 30, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GPT-4 | gpt-oss-20b | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝Text |
Reasoning Controls Defaults and configurable reasoning effort | Not reported | Always enabledEffort: High, Medium, LowDefault: Medium |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured OutputReasoning ModeContent Moderation | ✓Function Calling✓Structured Output✓Reasoning ModeContent Moderation |
Open Source Model availability | Proprietary | Available on HuggingFace → |
Pricing
GPT-4 is roughly 1000.0x more expensive compared to gpt-oss-20b for input tokens and roughly 461.5x more expensive for output tokens.
| GPT-4 | gpt-oss-20b | |
|---|---|---|
Input Token Cost Cost per million input tokens | $30.00 per million tokens | $0.03 per million tokens |
Output Token Cost Cost per million output tokens | $60.00 per million tokens | $0.13 per million tokens |
Cache Read Cost Cost to reuse cached input tokens | Not specified | $0.03 per million tokens |
Benchmarks
Compare relevant benchmarks between GPT-4 and gpt-oss-20b.
| GPT-4 | gpt-oss-20b | |
|---|---|---|
Intelligence Index Overall model quality across independent evaluations | Benchmark not available. | 14.9 (Artificial Analysis index; higher is better) |
Coding Index Programming performance across independent evaluations | 13.1 (Artificial Analysis index; higher is better) | 20.7 (Artificial Analysis index; higher is better) |
Agentic Index Ability to complete multi-step agentic tasks | Benchmark not available. | 3.1 (Artificial Analysis index; higher is better) |
Best Design Arena Score Highest human-preference Elo score across design arenas | Benchmark not available. | 972 Elo (#96 in Data Viz (39.7% win rate)) |
At a Glance
Quick overview of what makes GPT-4 and gpt-oss-20b unique.
GPT-4 by OpenAI can use external tools and APIs, generates structured data. It can handle standard conversations with its 8.2K token context window. Premium pricing at $30.00/M input and $60.00/M output tokens. Released May 28th, 2023.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.Explore More Comparisons
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Compare gpt-oss-20b with:
🚀Programming
Best models for coding and development
🎨Creative & Roleplay
Models optimized for creative writing
📢Marketing
Content creation and marketing tasks
💻Technology
Technical analysis and explanations
🔬Science
Scientific research and analysis
🌐Translation
Multilingual translation tasks