Context Window
400,000
Input tokens
Full-context input ≈ $0.50
Model Cost Profile
Developer: openai· Tokenizer: GPT · Quantization: unknown
Canonical ID: openai/gpt-5.1-20251113
Pricing updated Apr 29, 2026
OpenAI's GPT-5.1 offers a substantial context window of 400,000 tokens, making it suitable for complex applications such as long-form content generation, comprehensive document analysis, and advanced conversational agents. Teams utilizing this API model can expect an input cost of $1.25 per million tokens and an output cost of $10.00 per million tokens, which can significantly impact budget planning based on usage patterns. This model is ideal for organizations requiring extensive context retention and nuanced understanding in their AI-driven solutions.
Provider Compliance
Context Window
400,000
Input tokens
Full-context input ≈ $0.50
Max Output
128,000
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
100.0%
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $1.25 |
| Output (Completion) | $10.00 |
| Cache Read | $0.1300 |
Estimate monthly spend for OpenAI: GPT-5.1 based on your workload.
Estimated Monthly Cost
$151
25M input + 12M output tokens
Quick links for cost-down decisions before production rollout.