Claude Sonnet 5vsGemini 3.5 Flash-Lite
Claude Sonnet 5 | Gemini 3.5 Flash-Lite | |
|---|---|---|
| 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. | 80% | — |
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. | 63.2%Best | 54.2% |
Agentic coding CursorBench v3.1Cursor's own test of harder, real-world coding tasks inside a code editor. Higher is better. | 61.2% | — |
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. | 80.4%Best | 54% |
Browser agent BU BenchCan the AI drive a real web browser to finish tasks — clicking, filling forms, and navigating sites the way a person would? Run by Browser Use on their BU Bench task set. Higher is better. | — | 49% |
Web browsing BrowseCompCan the AI browse the web and track down hard-to-find answers? Higher is better. | 84.7% | — |
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. | 43.2% | — |
Multidisciplinary reasoning Humanity's Last Exam · with toolsHumanity's Last Exam — extremely hard expert questions across many subjects. “With tools” means the AI is allowed to search the web or run code while answering. Higher is better. | 57.4% | — |
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. | 81.2%Best | 74% |
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. | 1618 | — |
Knowledge work GDPval-AA v2economically valuable knowledge work (v2, re-based Elo) | — | 1140 |
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. | 1543 | — |
| Timeline | ||
| Release gap | Claude Sonnet 5 shipped 21 days before Gemini 3.5 Flash-Lite | |
| Overview | ||
| Company | Anthropic | |
| Release date | Jun 30 2026 | Jul 21 2026 |
| Access | Proprietary | Proprietary |
Which is better: Claude Sonnet 5 or Gemini 3.5 Flash-Lite?
Claude Sonnet 5 leads Gemini 3.5 Flash-Lite on 3 of the 3 benchmarks they both report (SWE-Bench Pro, Terminal-Bench 2.1, OSWorld-Verified). Claude Sonnet 5 shipped 21 days before Gemini 3.5 Flash-Lite, 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, Claude Sonnet 5 leads at 63.2% vs Gemini 3.5 Flash-Lite at 54.2%. On Terminal-Bench 2.1, Claude Sonnet 5 leads at 80.4% vs Gemini 3.5 Flash-Lite at 54%. On OSWorld-Verified, Claude Sonnet 5 leads at 81.2% vs Gemini 3.5 Flash-Lite at 74%.
Frequently asked questions
Claude Sonnet 5 was released by Anthropic on Jun 30 2026.
Gemini 3.5 Flash-Lite was released by Google on Jul 21 2026.
Claude Sonnet 5 leads on SWE-Bench Pro — Claude Sonnet 5 63.2% vs Gemini 3.5 Flash-Lite 54.2%.