Last refreshed 2026-06-15. Next refresh: weekly.
Why use GPT-5.1 Codex Mini on OpenRouter?
OpenRouter offers GPT-5.1 Codex Mini with pay-as-you-go pricing at $0.25/1M input tokens. OpenRouter is a multi-provider LLM aggregator offering unified API access to 300+ models from all major labs and emerging providers, with automatic failover for reliability.
Compare GPT-5.1 Codex Mini across 3 providers to find the best fit for your use caseInput / 1M
$0.25
Output / 1M
$2.00
Cache
read $0.025
Batch
Not sourced
Setup recipe
Docs fallbackInstall
Use the provider REST API or SDKAuth
Create a provider API keyCall
model: openai/gpt-5.1-codex-miniModel ID
openai/gpt-5.1-codex-miniRequest example
Curated snippets for this provider are not sourced yet. Use OpenRouter documentation with model ID
openai/gpt-5.1-codex-mini.Gotchas
- Use provider model ID "openai/gpt-5.1-codex-mini", not the LLMReference slug "gpt-5.1-codex-mini".
Compare GPT-5.1 Codex Mini Across Providers
| Provider | Input (per 1M) | Output (per 1M) |
|---|---|---|
| Vercel AI Gateway | $0.25 | $2.00 |
| OpenRouter | $0.25 | $2.00 |
| OpenAI API | $0.25 | $2.00 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.25 |
| Output tokens | $2.00 |
| Image input | $1.00 |
Capabilities
VisionMultimodalReasoningJSON / Tool use
About GPT-5.1 Codex Mini
GPT-5.1 Codex Mini is a smaller, faster, and more cost-efficient agentic coding model in the GPT-5.1 Codex lineup. Delivers approximately 4x more usage within ChatGPT subscriptions compared to GPT-5.1 Codex Max at a slight capability tradeoff. Priced at $0.25 per 1M input tokens and $2 per 1M output tokens via API. Available in the Codex CLI and IDE extension, where it is offered automatically when users approach their usage limit.
Get Started
Model Specs
Released2025-11-13
Context400k
ArchitectureDecoder Only
Knowledge cutoff2024-09