Home / OpenAI / GPT 5.1 Codex Mini
GPT 5.1 Codex Mini API price
openai/gpt-5.1-codex-mini
The cheapest GPT 5.1 Codex Mini API is $0.25/M input at OpenRouter (aggregator) - all 2 providers compared below, per 1M tokens.
SmallOpenAI400K context2 sellers
Input
$0.25
per 1M tokens · OpenRouter (aggregator)
Output
$2.00
per 1M tokens · OpenRouter (aggregator)
Where to buy it
Cheapest GPT 5.1 Codex Mini API providers compared - 2 sellers, from $0.25/M.
Cost calculator
| Provider | Input $/M | Output $/M | Cached in | Your cost |
|---|---|---|---|---|
| OpenRouter (aggregator) | 0.250cheapest | 2.00 | 0.030 | |
| OrcaRouter (aggregator) | 0.250 | 2.00 | - |
Against its tier
- This model$2.25
- Cheapest · Nemotron 3.5 Lightning$0.145
- Tier median · GPT 5.4 Nano (latest)$0.9425
- Dearest · GPT 5.4 Mini (03-17 snapshot)$5.25
#17 of 20 small · cheaper than 16%
Details
- Context window
- 400K400,000 tokens
- Developer
- OpenAI
- Intelligence
- 20.4 est. High
- Sellers
- 2
- Cached input
- $0.03where the source publishes one
- Cheapest at
- OpenRouter (aggregator)
- Combined
- $2.25in + out per 1M
- Last checked
- 2026-10-12