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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.
💰gpt-oss-20b is 100% cheaper than OpenAI: GPT-4
⚡OpenAI: GPT-4 is 53ms faster than gpt-oss-20b
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
OpenAI: GPT-4 is 58% faster
| Spec | gpt-oss-20b | OpenAI: GPT-4 |
|---|---|---|
| Provider | openai | openai |
| Input price / 1M tokens | Free | $30.00 |
| Output price / 1M tokens | — | $60.00 |
| Context window | 128k tokens | 8k tokens |
| Latency (p50) | 145ms | 92ms |
| Best benchmark score | — | — |
| Open source | No | No |
OpenAI’s open-weight models designed for powerful reasoning, agentic tasks, and versatile developer use cases – gpt-oss-20b is for lower latency, and local or specialized use-cases.
OpenAI's flagship model, GPT-4 is a large-scale multimodal language model capable of solving difficult problems with greater accuracy than previous models due to its broader general knowledge and advanced reasoning...
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