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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.
💰Z.ai: GLM Flash Latest is 99% cheaper than OpenAI: GPT-5 Codex
⚡Z.ai: GLM Flash Latest is 36ms faster than OpenAI: GPT-5 Codex
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
Z.ai: GLM Flash Latest is 14105% cheaper
| Spec | OpenAI: GPT-5 Codex | Z.ai: GLM Flash Latest |
|---|---|---|
| Provider | openai | ~z-ai |
| Input price / 1M tokens | $1.25 | $0.01 |
| Output price / 1M tokens | $10.00 | $0.18 |
| Context window | 400k tokens | 1049k tokens |
| Latency (p50) | 36ms | — |
| Best benchmark score | — | — |
| Open source | No | No |
GPT-5-Codex is a specialized version of GPT-5 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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