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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-4o (2024-08-06)
⚡OpenAI: GPT-5.1-Codex-Mini is 28ms faster than OpenAI: GPT-4o (2024-08-06)
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
OpenAI: GPT-5.1-Codex-Mini is 140% faster
| Spec | OpenAI: GPT-4o (2024-08-06) | OpenAI: GPT-5.1-Codex-Mini |
|---|---|---|
| Provider | openai | openai |
| Input price / 1M tokens | $2.50 | Free |
| Output price / 1M tokens | $10.00 | — |
| Context window | 128k tokens | 400k tokens |
| Latency (p50) | 48ms | 20ms |
| Best benchmark score | — | — |
| Open source | No | No |
The 2024-08-06 version of GPT-4o offers improved performance in structured outputs, with the ability to supply a JSON schema in the respone_format. Read more [here](https://openai.com/index/introducing-structured-outputs-in-the-api/). GPT-4o ("o" for "omni") is...
GPT-5.1-Codex-Mini is a smaller and faster version of GPT-5.1-Codex
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