Context Window
128,000
Input tokens
Full-context input ≈ $0.16
Model Cost Profile
Developer: openai· Tokenizer: GPT · Quantization: unknown
Canonical ID: openai/gpt-5.1-chat-20251113
Pricing updated Apr 30, 2026
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.
Provider Compliance
Context Window
128,000
Input tokens
Full-context input ≈ $0.16
Max Output
16,384
Completion tokens
Input Price / 1M
$1.25
Prompt tokens
Output Price / 1M
$10.00
Completion tokens
Top Benchmark
Pending
No benchmark data yet
Price History
Current Input / 1M
$1.25
Current Output / 1M
$10.00
Performance History
Current TPS
0.00
Current Latency
0ms
Uptime
99.9%
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $1.25 |
| Output (Completion) | $10.00 |
| Cache Read | $0.1250 |
| Web Search | $10,000.00 |
Estimate monthly spend for OpenAI: GPT-5.1 Chat based on your workload.
Estimated Monthly Cost
$151
25M input + 12M output tokens
Quick links for cost-down decisions before production rollout.