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 2 providers to find the best fit for your use caseSetup recipe
Docs fallbackUse the provider REST API or SDKCreate a provider API keymodel: openai/gpt-5.1-codex-miniopenai/gpt-5.1-codex-miniRequest example
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 |
Pricing
| Type | Price (per 1M) |
|---|---|
| Input tokens | $0.25 |
| Output tokens | $2.00 |
| Image input | $1.00 |
Capabilities
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.
FAQ
What does GPT-5.1 Codex Mini cost on OpenRouter?
On OpenRouter, GPT-5.1 Codex Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens.
What is the context window for GPT-5.1 Codex Mini on OpenRouter?
GPT-5.1 Codex Mini supports a 400k token context window on OpenRouter.
How does OpenRouter compare to other GPT-5.1 Codex Mini providers?
GPT-5.1 Codex Mini is available from 2 providers. The cheapest input pricing is $0.25/1M tokens from Vercel AI Gateway.
What API model ID do I use for GPT-5.1 Codex Mini on OpenRouter?
Use the model ID openai/gpt-5.1-codex-mini when calling OpenRouter's API.
Who created GPT-5.1 Codex Mini?
GPT-5.1 Codex Mini was created by OpenAI as part of the GPT-5.1 model family.
Is GPT-5.1 Codex Mini open source?
GPT-5.1 Codex Mini is not open source; the seed data lists it as proprietary.