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Side-by-side comparison of API pricing, context window, latency, and benchmark performance. Data refreshed daily from provider APIs and ModelStop's own latency probes.
💰OpenAI: GPT-5.1-Codex-Mini is 100% cheaper than OpenAI: GPT-5 Mini
⚡OpenAI: GPT-5.1-Codex-Mini is 30ms faster than OpenAI: GPT-5 Mini
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
OpenAI: GPT-5.1-Codex-Mini is 150% faster
| Spec | OpenAI: GPT-5 Mini | OpenAI: GPT-5.1-Codex-Mini |
|---|---|---|
| Provider | openai | openai |
| Input price / 1M tokens | $0.25 | Free |
| Output price / 1M tokens | $2.00 | — |
| Context window | 400k tokens | 400k tokens |
| Latency (p50) | 50ms | 20ms |
| Best benchmark score | — | — |
| Open source | No | No |
GPT-5 Mini is a compact version of GPT-5, designed to handle lighter-weight reasoning tasks. It provides the same instruction-following and safety-tuning benefits as GPT-5, but with reduced latency and cost....
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
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