Context Window
128,000
Tokens
Model Cost Profile
OpenAI: GPT-5.1 Chat
Developer: openai
Pricing updated Mar 16, 2026
Input rank: #268Output rank: #302
OpenAI's GPT-5.1 Chat model features an extensive context window of 128,000 tokens, making it ideal for applications requiring in-depth conversation history or complex document analysis. Teams leveraging this API can expect a competitive input cost of $1.25 per 1 million tokens and an output cost of $10.00 per 1 million tokens, which allows for scalable budgeting depending on usage patterns. This model is particularly suited for customer support automation, content generation, and advanced natural language understanding tasks, providing businesses with a versatile tool for enhancing user engagement and operational efficiency.
👁 Vision🔧 Tool Calling🔌 MCP Compatible📋 Structured Output
Input Price / 1M
$1.25
Prompt tokens
Output Price / 1M
$10.00
Completion tokens
Top Benchmark
Pending
No benchmark data yet
Quality & Benchmarks
Evaluation scores for OpenAI: GPT-5.1 Chat. The “Top Benchmark” shown above is the highest-priority score available (MMLU > GPQA > MATH > HumanEval).
🔧
Tool Calling Supported🔌 MCP Compatible
Price History
OpenAI: GPT-5.1 Chat Pricing Trend
Input / 1M tokens0.0%Output / 1M tokens0.0%
Mar 7 — Mar 16
Current Input / 1M
$1.25
Current Output / 1M
$10.00
Performance History
OpenAI: GPT-5.1 Chat Speed Trend
Not enough data yet. Performance tracking started recently — check back in a few days.
Side-by-Side Pricing Table
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $1.25 |
| Output (Completion) | $10.00 |
| Cache Read | $0.1250 |
Cost Calculator
Estimate monthly spend for OpenAI: GPT-5.1 Chat based on your workload.
01.0B
0500M
Estimated Monthly Cost
$151
25M input + 12M output tokens
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Quick links for cost-down decisions before production rollout.