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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 is 100% cheaper than OpenAI: GPT-4o Audio
⚡OpenAI: GPT-4o Audio is 31ms faster than OpenAI: GPT-5.1-Codex
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
| Spec | OpenAI: GPT-4o Audio | OpenAI: GPT-5.1-Codex |
|---|---|---|
| Provider | openai | openai |
| Input price / 1M tokens | $2.50 | Free |
| Output price / 1M tokens | $10.00 | — |
| Context window | 128k tokens | 400k tokens |
| Latency (p50) | — | 31ms |
| Best benchmark score | — | — |
| Open source | No | No |
The gpt-4o-audio-preview model adds support for audio inputs as prompts. This enhancement allows the model to detect nuances within audio recordings and add depth to generated user experiences. Audio outputs...
GPT-5.1-Codex is a specialized version of GPT-5.1 optimized for software engineering and coding workflows. It is designed for both interactive development sessions and long, independent execution of complex engineering tasks....
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