openai
OpenAI: GPT-5.1 Chat
OpenAI's GPT-5.1 Chat is designed for handling text, file, and image inputs within a context length of 128,000 tokens. It supports tool integration but lacks reasoning capabilities or structured output formats. Given its pricing at $1.25 per million input tokens and $10.0 per million output tokens, this model may be suitable for users requiring extensive data handling and tool integration, particularly those who are willing to pay the higher cost for more input token flexibility. However, with no independent benchmark coverage yet, potential users should consider its current limitations before shortlisting it for their needs.
Quality Score
90/100
price + capability + benchmarks
Input Price
$1.25
per 1M tokens
Output Price
$10.00
per 1M tokens
Context Window
128,000
tokens
- Model ID
- openai/gpt-5.1-chat
- Vendor
- openai
- Released
- November 2025
- Tokenizer
- GPT
- Input Modalities
- file, image, text
- Output Modalities
- text
- Max Output
- 16,384 tokens
- Tool Calling
- ✓ supported
- Structured Output
- ✓ supported
- Reasoning Mode
- not supported
- Vision
- ✓ accepts images
- Audio
- no
- Moderated
- yes
What it costs in practice
Computed from the current $1.25/M input and $10.00/M output rates. Run your own numbers →
| Job | Tokens | Cost |
|---|---|---|
| Summarize a 50-page report | 30k in / 1.5k out | $0.05 |
| Classify 1,000 customer emails | 500k in / 50k out | $1.12 |
| A month of a busy support chatbot | 5M in / 2M out | $26.25 |
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Quick answers
- How much does OpenAI: GPT-5.1 Chat cost?
- $1.25 per million input tokens and $10.00 per million output tokens.
- What is OpenAI: GPT-5.1 Chat's context window?
- 128,000 tokens, roughly 192 pages of text in a single request.
- Does OpenAI: GPT-5.1 Chat support tool calling?
- It supports tool calling, structured output.
- Can OpenAI: GPT-5.1 Chat process images?
- Yes, it accepts image input.