GPT-3.5 Turbo (older v0613) vs GPT-5 Nano (Comparative Analysis)
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Comparative Analysis: GPT-3.5 Turbo (older v0613) vs. GPT-5 Nano
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Overview
GPT-3.5 Turbo (older v0613) was released 1 year before GPT-5 Nano.
 GPT-3.5 Turbo (older v0613) | GPT-5 Nano | |
|---|---|---|
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 | 400K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 4.1K tokens | 128K tokens |
Release Date When this model first became publicly available | January 25, 2024 2 years ago January 25th, 2024 | August 7, 2025 11 months ago August 7th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | September 30, 2021 | May 31, 2024 |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GPT-3.5 Turbo (older v0613) | GPT-5 Nano | |
|---|---|---|
Input Types Supported input formats | 📝Text | 📝Text🖼️Image📁File |
Reasoning Controls Defaults and configurable reasoning effort | Not reported | Always enabledEffort: High, Medium, Low, MinimalDefault: 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 Mode✓Content Moderation |
Pricing
GPT-3.5 Turbo (older v0613) is roughly 20.0x more expensive compared to GPT-5 Nano for input tokens and roughly 5.0x more expensive for output tokens.
| GPT-3.5 Turbo (older v0613) | GPT-5 Nano | |
|---|---|---|
Input Token Cost Cost per million input tokens | $1.00 per million tokens | $0.05 per million tokens |
Output Token Cost Cost per million output tokens | $2.00 per million tokens | $0.40 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 | Not specified | $0.0050 per million tokens |
Benchmarks
Compare relevant benchmarks between GPT-3.5 Turbo (older v0613) and GPT-5 Nano.
| GPT-3.5 Turbo (older v0613) | GPT-5 Nano | |
|---|---|---|
Best Design Arena Score Highest human-preference Elo score across design arenas | Benchmark not available. | 1,129 Elo (#81 in Website (48.9% win rate)) |
At a Glance
Quick overview of what makes GPT-3.5 Turbo (older v0613) and GPT-5 Nano 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-5 Nano 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 400K token context window. Very affordable at $0.05/M input and $0.40/M output tokens. Includes built-in content moderation for safer outputs. Released August 7th, 2025.Explore More Comparisons
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