OpenAI

GPT-5.1-Codex-Max

CapableProprietaryReasoningProprietary
Try in Playground →API Docs →
Input Price
$1.25
/M tokens
Output Price
$10.00
/M tokens
Context
400K
tokens

One9Founders Verdict

GPT-5.1-Codex-Max from OpenAI. Proprietary API model. 400K context. $1.25/$10.0 per 1M tokens.

Pricing Details

Input
$1.25
per 1M tokens
Output
$10.00
per 1M tokens
Cached Input
$0.13
per 1M tokens

Capabilities

✓Function Calling
✓Structured Output
✓Vision
-Web Search
-Code Execution
-MCP
✗Audio Input
✗Video Input
✓Reasoning
✓Streaming
-Batch API
-Computer Use

Security & Compliance

✓SOC 2 Type II
✓GDPR
✓HIPAA
✓Enterprise SSO
✓Audit Logs

Training data policy: API data not used for training by default (opt-out / ZDR available)

DPDP Act (India): No India-resident inference by default. Use DPA + region controls.

Data residency: US, EU

India Availability

API available globally

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