GPT-5.1 Chat
OpenAI
At a glance
- Price per 1M tokens (input)
- $1.25
- Price per 1M tokens (output)
- $10.00
- Context
- 128,000 tokens
- Free access
- yes (see below)
Refreshed daily; data verified August 16, 2026. Published August 12, 2026.
The GPT-5.1 Chat model is designed for businesses and organizations that require advanced natural language processing capabilities, particularly those involving image understanding and step-by-step reasoning. This model suits tasks such as automated customer support, content generation, and data analysis, where the ability to understand and interpret visual information is crucial. The vendor's approach distinguishes itself through its emphasis on developing models that can engage in nuanced and context-specific conversations, making it an ideal choice for applications where user experience is paramount. By leveraging this technology, businesses can enhance their operational efficiency and improve customer engagement. The model's capabilities are based on its ability to process and generate human-like text, allowing for more effective tool calling and integration with existing systems.
Specifications & pricing
| Input (per 1M tokens) | $1.25 |
|---|---|
| Output (per 1M tokens) | $10.00 |
| Cache read (per 1M tokens) | $0.13 |
| Context window | 128,000 tokens |
| Max output | 16,384 tokens |
| Capabilities | images, reasoning |
LiteLLM community dataset (MIT), verified August 16, 2026. Official OpenAI pricing.
What GPT-5.1 Chat would cost on your workload — run it through the cost calculator →
Where to try GPT-5.1 Chat for free
- OpenAI offers a free chat — ChatGPT (free plan). A vendor's free chat may run a different model from the same family — the exact model is not guaranteed.
Frequently asked questions
What kind of tasks is the GPT-5.1 Chat model good for+
The GPT-5.1 Chat model is well-suited for tasks that involve natural language understanding, image interpretation, and step-by-step reasoning, such as automated customer support, content generation, and data analysis
How do I get started with the GPT-5.1 Chat model+
To get started with the GPT-5.1 Chat model, users can begin by reviewing the model's documentation and guidelines, which provide detailed information on its capabilities, limitations, and integration requirements
How does the GPT-5.1 Chat model differ from other models in the line+
The GPT-5.1 Chat model differs from other models in the line through its advanced image understanding and step-by-step reasoning capabilities, which enable it to engage in more nuanced and context-specific conversations
What are the limitations of the GPT-5.1 Chat model+
The limitations of the GPT-5.1 Chat model include its potential for biased responses, dependence on high-quality training data, and requirement for careful integration with existing systems to ensure optimal performance
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