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-codex-max-20251204
Pricing updated Apr 27, 2026
OpenAI's GPT-5.1-Codex-Max offers a substantial context window of 400,000 tokens, making it ideal for complex applications such as code generation, natural language processing, and large-scale data analysis. 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 may influence budget considerations for extensive projects. This pricing structure allows organizations to scale their usage based on specific needs, ensuring flexibility for varying workloads and applications.
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 | $0.1250 |
| Web Search | $10,000.00 |
Estimate monthly spend for OpenAI: GPT-5.1-Codex-Max based on your workload.
Estimated Monthly Cost
$151
25M input + 12M output tokens
Quick links for cost-down decisions before production rollout.