GPT-3.5 Turbo (older v0613) vs gpt-oss-20b (Comparative Analysis)
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Comparative Analysis: GPT-3.5 Turbo (older v0613) vs. gpt-oss-20b
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Overview
GPT-3.5 Turbo (older v0613) was released 1 year before gpt-oss-20b.
 GPT-3.5 Turbo (older v0613) | 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 | 4.1K 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 | January 25, 2024 2 years ago January 25th, 2024 | 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-3.5 Turbo (older v0613) | 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-3.5 Turbo (older v0613) is roughly 33.3x more expensive compared to gpt-oss-20b for input tokens and roughly 14.3x more expensive for output tokens.
| GPT-3.5 Turbo (older v0613) | gpt-oss-20b | |
|---|---|---|
Input Token Cost Cost per million input tokens | $1.00 per million tokens | $0.03 per million tokens |
Output Token Cost Cost per million output tokens | $2.00 per million tokens | $0.14 per million tokens |
Benchmarks
Compare relevant benchmarks between GPT-3.5 Turbo (older v0613) and gpt-oss-20b.
| GPT-3.5 Turbo (older v0613) | 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 | Benchmark not available. | 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. | 964 Elo (#100 in Data Viz (39.7% win rate)) |
At a Glance
Quick overview of what makes GPT-3.5 Turbo (older v0613) and gpt-oss-20b unique.
GPT-3.5 Turbo (older v0613) by OpenAI can use external tools and APIs, generates structured data. It can handle standard conversations with its 4.1K token context window. Reasonably priced at $1.00/M input and $2.00/M output tokens. Released January 25th, 2024.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 $0.14/M output tokens. Released August 5th, 2025.Explore More Comparisons
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🚀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
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