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OpenAI: GPT-5.1-Codex-Mini API Pricing
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
How much does OpenAI: GPT-5.1-Codex-Mini cost for a real workload?
At 10M input + 2M output tokens per month, OpenAI: GPT-5.1-Codex-Mini costs about $6.5 ($2.5 input + $4 output). Try your own volumes in the cost calculator.
What are cheaper alternatives to OpenAI: GPT-5.1-Codex-Mini?
- Qwen: Qwen3 VL 235B A22B Instruct — $0.21 in / $1.9 out per 1M
- Relace: Relace Apply 3 — $0.85 in / $1.25 out per 1M
- AionLabs: Aion 3.5 Mini — $0.7 in / $1.4 out per 1M
- AionLabs: Aion-3.0-Mini — $0.7 in / $1.4 out per 1M
- Qwen: Qwen3.5 Plus 2026-04-20 — $0.3 in / $1.8 out per 1M
- Mistral: Mistral Large 3 2512 — $0.5 in / $1.5 out per 1M
Compare OpenAI: GPT-5.1-Codex-Mini with other models
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Frequently asked questions
How much does OpenAI: GPT-5.1-Codex-Mini cost?
OpenAI: GPT-5.1-Codex-Mini costs $0.25 per 1M input tokens and $2 per 1M output tokens (list price, snapshot October 21, 2026). At 10M input + 2M output tokens per month that is about $6.5.
What is the context window of OpenAI: GPT-5.1-Codex-Mini?
OpenAI: GPT-5.1-Codex-Mini has a context window of 400,000 tokens and can return up to 128,000 output tokens per response.
What are cheaper alternatives to OpenAI: GPT-5.1-Codex-Mini?
Cheaper models include Qwen: Qwen3 VL 235B A22B Instruct ($0.21 in / $1.9 out), Relace: Relace Apply 3 ($0.85 in / $1.25 out), AionLabs: Aion 3.5 Mini ($0.7 in / $1.4 out). See the full list on this page.
Is OpenAI: GPT-5.1-Codex-Mini free to use?
No. OpenAI: GPT-5.1-Codex-Mini is a paid model at $0.25 input / $2 output per 1M tokens. 20 free models are listed on the free models page.
Provider: openai · Model ID: openai/gpt-5.1-codex-mini · Modality: text+image->text · Price snapshot October 21, 2026, refreshed daily. How we collect prices