GPT-4o-mini (2024-07-18) vs GPT-5.1 Chat (Comparative Analysis)
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Comparative Analysis: GPT-4o-mini (2024-07-18) vs. GPT-5.1 Chat
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Overview
GPT-4o-mini (2024-07-18) was released 1 year before GPT-5.1 Chat.
 GPT-4o-mini (2024-07-18) | GPT-5.1 Chat | |
|---|---|---|
Model Provider The organization behind this AI's development | OpenAI | OpenAI |
Input Context Window Maximum input tokens this model can process at once | 128K tokens | 128K tokens |
Output Token Limit Maximum output tokens this model can generate at once | 16.4K tokens | 32K tokens |
Release Date When this model first became publicly available | July 18, 2024 2 years ago July 18th, 2024 | November 13, 2025 8 months ago November 13th, 2025 |
Knowledge Cutoff Latest training-data date reported by the provider | October 31, 2023 | Not reported |
Capabilities & Features
Compare supported features, modalities, and advanced capabilities
GPT-4o-mini (2024-07-18) | GPT-5.1 Chat | |
|---|---|---|
Input Types Supported input formats | 📝Text🖼️Image📁File | 📁File🖼️Image📝Text |
Output Types Supported output formats | 📝Text | 📝Text |
Tokenizer Text encoding system | GPT | GPT |
Key Features Advanced capabilities | ✓Function Calling✓Structured OutputReasoning Mode✓Content Moderation | ✓Function Calling✓Structured OutputReasoning ModeContent Moderation |
Pricing
GPT-4o-mini (2024-07-18) is roughly 0.1x less expensive compared to GPT-5.1 Chat for input tokens and roughly 0.06x less expensive for output tokens.
| GPT-4o-mini (2024-07-18) | GPT-5.1 Chat | |
|---|---|---|
Input Token Cost Cost per million input tokens | $0.15 per million tokens | $1.25 per million tokens |
Output Token Cost Cost per million output tokens | $0.60 per million tokens | $10.00 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 | $0.07 per million tokens | $0.13 per million tokens |
At a Glance
Quick overview of what makes GPT-4o-mini (2024-07-18) and GPT-5.1 Chat unique.
GPT-4o-mini (2024-07-18) by OpenAI understands both text and images, can use external tools and APIs, generates structured data. It can handle standard conversations with its 128K token context window. Very affordable at $0.15/M input and $0.60/M output tokens. Includes built-in content moderation for safer outputs. Released July 18th, 2024.GPT-5.1 Chat by OpenAI understands both text and images, can use external tools and APIs, generates structured data. It can handle standard conversations with its 128K token context window. Reasonably priced at $1.25/M input and $10.00/M output tokens. Released November 13th, 2025.Explore More Comparisons
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