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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 21ms faster than OpenAI: GPT-5.1-Codex-Max
Price (lower is better), Speed/Latency (lower is better), Performance (higher is better)
| Spec | gpt-oss-20b | OpenAI: GPT-5.1-Codex-Max |
|---|---|---|
| Provider | openai | openai |
| Input price / 1M tokens | Free | Free |
| Output price / 1M tokens | — | — |
| Context window | — | 400k tokens |
| Latency (p50) | — | 21ms |
| Best benchmark score | — | — |
| Open source | No | No |
gpt-oss-20b — available via AWS Bedrock (us-east-1).
GPT-5.1-Codex-Max is OpenAI’s latest agentic coding model, designed for long-running, high-context software development tasks. It is based on an updated version of the 5.1 reasoning stack and trained on agentic...
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