GPT-5.1 Codex Mini pricing
Source: litellm · updated 2026-10-28
Short answer: GPT-5.1 Codex Mini costs $0.250 per million input tokens and $2.00 per million output tokens. That is a 3:1 blended rate of $0.688 per million tokens, ranking it #277 of 713 tracked models by input price.
Price breakdown
| Metric | USD |
|---|---|
| Input, per 1M tokens | $0.250 |
| Output, per 1M tokens | $2.00 |
| Output รท input multiple | 8.00× |
| 3:1 blended, per 1M tokens | $0.688 |
| Context window | 400,000 tokens |
What a typical workload costs
| Monthly volume | Input cost | Output cost | Total | 1M in / 250K out | $0.250 | $0.500 | $0.750 |
|---|---|---|---|---|---|---|---|
| 10M in / 2.5M out | $2.50 | $5.00 | $7.50 | ||||
| 100M in / 25M out | $25.00 | $50.00 | $75.00 |
Other gpt models
| Model | Input | Output |
|---|---|---|
| GPT-5 Nano | $0.050 | $0.400 |
| GPT-4.1 Nano | $0.100 | $0.400 |
| GPT-4 O Mini Audio Preview | $0.150 | $0.600 |
| GPT-4 O Mini Search Preview | $0.150 | $0.600 |
| GPT-4 O Mini Search Preview | $0.150 | $0.600 |
Compare against
Cheaper alternatives
Next cheaper option: Qwen 3.5 Plus at $0.300 per 1M input tokens. Next step up: Hermes 3 Llama 3.1 70 B at $0.700 per 1M input tokens.