Gemini 3.5 Flash vs Grok 4.5
Google Gemini 3.5 Flash | SpaceXAI Grok 4.5 | |
|---|---|---|
| Overview | ||
| Company | SpaceXAI | |
| Release date | May 19 2026 | 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. | 20% | — |
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. | 55.1% | 64.7%Best |
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 CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 49.8% | — |
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. | 76.2% | 83.3%Best |
Multi-step tool use MCP AtlasCan the AI chain together many tools and steps to complete one bigger task, rather than doing just a single thing? Higher is better. | 83.6% | — |
General tool use ToolathlonTests how well the AI uses everyday real-world tools and apps to get things done. Higher is better. | 56.5% | — |
Multidisciplinary reasoning Humanity's Last Exam · no toolsHumanity's Last Exam — extremely hard expert questions across many subjects, written so you can't just look up the answer. “No tools” means the AI answers on its own. Higher is better. | 40.2% | — |
Abstract reasoning ARC-AGI-2Puzzle-style tests of abstract reasoning and pattern-finding — the kind of thing people find easy but AIs often struggle with. Higher is better. | 72.1% | — |
Agentic computer use OSWorld-VerifiedCan the AI actually operate a computer — clicking, typing, and using real apps — to finish tasks on its own? Higher is better. | 78.4% | — |
Agentic financial analysis Finance Agent v2Tests the AI on real financial-analysis work, like digging through reports and making sound decisions. Higher is better. | 57.9% | — |
Knowledge work GDPval-AAMeasures how well the AI does economically valuable knowledge work, judged against human experts. Shown as a rating (like a chess Elo) — higher is better. | 1656 | — |
Chart reasoning CharXiv ReasoningCan the AI read and reason about complex charts and figures, not just text? Higher is better. | 84.2% | — |
Multimodal reasoning MMMU-ProA tougher version of MMMU — college-level questions that mix images, diagrams, and text together. Higher is better. | 83.6% | — |
Spatial reasoning Blueprint-Bench 2Can the AI reason about space and layout — for example, understanding a floor plan or blueprint? Higher is better. | 33.6% | — |
Long context MRCR v2 (8-needle) · 128k averageTests whether the AI can find specific details buried inside a very long document (around 128k tokens — roughly a long book). Higher is better. | 77.3% | — |
Long context MRCR v2 (8-needle) · 1M pointwiseTests whether the AI can find specific details buried inside an enormous document (around 1 million tokens — many books). Higher is better. | 26.6% | — |
| Timeline | ||
| Release gap | Gemini 3.5 Flash shipped 50 days before Grok 4.5 | |
Which is better: Gemini 3.5 Flash or Grok 4.5?
Grok 4.5 leads Gemini 3.5 Flash on 2 of the 2 benchmarks they both report (SWE-Bench Pro, Terminal-Bench 2.1). Gemini 3.5 Flash shipped 50 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.
On SWE-Bench Pro, Grok 4.5 leads at 64.7% vs Gemini 3.5 Flash at 55.1%. On Terminal-Bench 2.1, Grok 4.5 leads at 83.3% vs Gemini 3.5 Flash at 76.2%.
Frequently asked questions
Gemini 3.5 Flash was released by Google on May 19 2026.
Grok 4.5 was released by SpaceXAI on Jul 8 2026.
Grok 4.5 leads on SWE-Bench Pro — Gemini 3.5 Flash 55.1% vs Grok 4.5 64.7%.
Other comparisons
Gemini 3.5 Flash vs Claude Sonnet 5Grok 4.5 vs Claude Sonnet 5Gemini 3.5 Flash vs GPT-5.6 SolGrok 4.5 vs GPT-5.6 SolGemini 3.5 Flash vs Muse SparkGrok 4.5 vs Muse SparkGemini 3.5 Flash vs DeepSeek-V4-ProGrok 4.5 vs DeepSeek-V4-ProGemini 3.5 Flash vs Mistral Medium 3.5Grok 4.5 vs Mistral Medium 3.5Gemini 3.5 Flash vs Kimi K2.7 CodeGrok 4.5 vs Kimi K2.7 Code