Grok 3 vs Grok 4.5
SpaceXAI Grok 3 | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | SpaceXAI | SpaceXAI |
| Release date | Feb 17 2025 | Jul 8 2026 |
| Access | Proprietary | Proprietary |
| Benchmarks | ||
Nonsense detection BullshitBench v2Given a confidently-worded but nonsensical prompt, does the AI spot that it makes no sense and push back — instead of playing along and inventing an answer? The score is how often it clearly called out the nonsense. Higher is better. | — | 54% |
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% |
Next.js coding Next.js EvalsVercel's open eval of how well AI coding agents build and migrate real Next.js apps — measured as the share of tasks the agent completes successfully. Higher is better. | — | 83% |
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% |
Agentic legal work Harvey's Legal Agent BenchmarkHarvey's test of whether an AI agent can complete real legal work — drafting and reviewing documents, working with spreadsheets and presentations, and navigating files the way a lawyer's assistant would. Higher is better. | — | 12.92% |
Medical admin work MedScribeCan the AI support doctors with their administrative work, like notes and paperwork? Created by Vals AI. Higher is better. | — | 86.88% |
Community preference (code) Arena Elo (Code)Like the text arena, but people vote on which AI writes better code. The votes become a chess-style Elo rating on arena.ai. Higher is better. | — | 1566 |
| Timeline | ||
| Release gap | Grok 3 shipped 506 days before Grok 4.5 | |
Which is better: Grok 3 or Grok 4.5?
Grok 3 and Grok 4.5 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok 3 shipped 506 days before Grok 4.5, so benchmark comparisons should account for the intervening progress.
Published specifications for these two models are limited — see each model page for the latest details.
Direct benchmark comparisons are unavailable — Grok 3 and Grok 4.5 don't publish scores on any of the same benchmarks.
Frequently asked questions
Grok 3 was released by SpaceXAI on Feb 17 2025.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
Other comparisons
Grok 3 vs Claude Sonnet 5Grok 4.5 vs Claude Sonnet 5Grok 3 vs GPT-5.6 SolGrok 4.5 vs GPT-5.6 SolGrok 3 vs Gemini 3.5 FlashGrok 4.5 vs Gemini 3.5 FlashGrok 3 vs Muse Spark 1.1Grok 4.5 vs Muse Spark 1.1Grok 3 vs DeepSeek-V4-ProGrok 4.5 vs DeepSeek-V4-ProGrok 3 vs Mistral Medium 3.5Grok 4.5 vs Mistral Medium 3.5