Lightweight code-focused model for efficient software development workflows.
LLM Gateway routes requests to the best providers that are able to handle your prompt size and parameters.
Lightweight code-focused model for efficient software development workflows. You can access it through LLM Gateway's OpenAI-compatible API with automatic provider routing, fallback, and cost analytics.
Pricing for GPT-5.1 Codex mini on LLM Gateway starts at $0.25 per million input tokens and $2.00 per million output tokens, depending on the provider. The pricing table above always reflects the current per-provider rates.
GPT-5.1 Codex mini supports a context window of up to 400,000 tokens on its largest provider deployment.
GPT-5.1 Codex mini is served by Azure through LLM Gateway. Requests are automatically routed to the best available provider, with fallback when a provider has issues.
GPT-5.1 Codex mini supports tool (function) calling and soft JSON output, but NOT strict JSON output schema (its upstream provider does not enforce it).
GPT-5.1 Codex mini was released on November 12, 2025.