Context Window
400,000
Input tokens
Full-context input ≈ $0.10
Model Cost Profile
Developer: openai· Tokenizer: GPT · Quantization: unknown
Canonical ID: openai/gpt-5.1-codex-mini-20251113
Pricing updated Apr 24, 2026
Live Pricing
Input: $0.2500
Output: $2.00
Last synced Apr 24, 2026 · MMLU score via public benchmark data
OpenAI's GPT-5.1-Codex-Mini is designed for teams needing advanced coding assistance, capable of processing a substantial context window of 400,000 tokens to handle complex programming tasks. With input costs at $0.25 per million tokens and output costs at $2.00 per million tokens, this model offers a cost-effective solution for developers working on large-scale projects or applications requiring extensive code generation and analysis. Its efficient pricing structure allows teams to optimize their budgets while leveraging powerful AI capabilities for software development and automation.
Provider Compliance
Context Window
400,000
Input tokens
Full-context input ≈ $0.10
Max Output
128,000
Completion tokens
Input Price / 1M
$0.2500
Prompt tokens
Output Price / 1M
$2.00
Completion tokens
Top Benchmark
82.0
MMLU score — highest of MMLU, GPQA, MATH, HumanEval
Evaluation scores for OpenAI: GPT-5.1-Codex-Mini. The “Top Benchmark” shown above is the highest score across MMLU, GPQA, MATH & HumanEval.
Price History
Current Input / 1M
$0.2500
Current Output / 1M
$2.00
Performance History
Current TPS
0.00
Current Latency
0ms
Uptime
100.0%
| Usage Type | Price / 1M Tokens |
|---|---|
| Input (Prompt) | $0.2500 |
| Output (Completion) | $2.00 |
| Cache Read | $0.0300 |
Estimate monthly spend for OpenAI: GPT-5.1-Codex-Mini based on your workload.
Estimated Monthly Cost
$30
25M input + 12M output tokens
Quick links for cost-down decisions before production rollout.