gpt-oss-20b vs Grok 4.5
OpenAI gpt-oss-20b | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | OpenAI | SpaceXAI |
| Release date | Aug 5 2025 | Jul 8 2026 |
| Access | Open Weight | Proprietary |
| Benchmarks | ||
Agentic coding SWE-Bench ProCan the AI fix real bugs in real software? It's handed actual problems from open-source projects and has to write code that genuinely solves them. Higher is better. | — | 64.7% |
Multilingual coding SWE-Bench MultilingualLike SWE-Bench, but the coding problems span many programming languages, not just one. Tests how broadly the AI can code. Higher is better. | — | 78% |
Agentic coding DeepSWE 1.0Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. Higher is better. | — | 62% |
Agentic terminal coding Terminal-Bench 2.1Can the AI work in a command-line terminal — running commands and finishing technical setup tasks the way a developer would? Higher is better. | — | 83.3% |
| Timeline | ||
| Release gap | gpt-oss-20b shipped 337 days before Grok 4.5 | |
Which is better: gpt-oss-20b or Grok 4.5?
gpt-oss-20b and Grok 4.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. gpt-oss-20b shipped 337 days before Grok 4.5, so benchmark comparisons should account for the intervening progress.
gpt-oss-20b is open weight, while Grok 4.5 is proprietary.
Direct benchmark comparisons are unavailable — gpt-oss-20b and Grok 4.5 don't publish scores on any of the same benchmarks.
Frequently asked questions
gpt-oss-20b was released by OpenAI on Aug 5 2025.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
gpt-oss-20b is an open weight model released by OpenAI. Grok 4.5 is a proprietary model released by SpaceXAI.
Other comparisons
gpt-oss-20b vs Claude Sonnet 5Grok 4.5 vs Claude Sonnet 5gpt-oss-20b vs Gemini OmniGrok 4.5 vs Gemini Omnigpt-oss-20b vs Muse SparkGrok 4.5 vs Muse Sparkgpt-oss-20b vs DeepSeek-V4-ProGrok 4.5 vs DeepSeek-V4-Progpt-oss-20b vs Mistral Medium 3.5Grok 4.5 vs Mistral Medium 3.5gpt-oss-20b vs Kimi K2.7 CodeGrok 4.5 vs Kimi K2.7 Code