Gemini 3.5 Flash-LitevsGPT-5.6 Sol
Gemini 3.5 Flash-Lite | GPT-5.6 Sol | |
|---|---|---|
| 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. | — | 47% |
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. | 54.2% | — |
Agentic coding DeepSWE 1.1Artificial Analysis' independent test of deep, agentic software-engineering work — the AI has to plan and carry out substantial coding tasks end to end. (Version 1.1 of the test.) Higher is better. | — | 73% |
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. | — | 92% |
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. | 54% | 88.8%Best |
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% | 67%Best |
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. | 74% | — |
Knowledge work GDPval-AA v2economically valuable knowledge work (v2, re-based Elo) | 1140 | 1748Best |
Community preference Arena Elo (Text)Real people chat with two anonymous AIs side by side and vote for the answer they prefer. Votes become a chess-style Elo rating on arena.ai — it measures which AI people actually like, not test scores. Higher is better. | — | 1486 |
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. | — | 1618 |
| Timeline | ||
| Release gap | GPT-5.6 Sol shipped 25 days before Gemini 3.5 Flash-Lite | |
| Overview | ||
| Company | OpenAI | |
| Release date | Jul 21 2026 | Jun 26 2026 |
| Access | Proprietary | Proprietary |
Which is better: Gemini 3.5 Flash-Lite or GPT-5.6 Sol?
GPT-5.6 Sol leads Gemini 3.5 Flash-Lite on 3 of the 3 benchmarks they both report (Terminal-Bench 2.1, BU Bench, GDPval-AA v2). GPT-5.6 Sol shipped 25 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 Terminal-Bench 2.1, GPT-5.6 Sol leads at 88.8% vs Gemini 3.5 Flash-Lite at 54%. On BU Bench, GPT-5.6 Sol leads at 67% vs Gemini 3.5 Flash-Lite at 49%. On GDPval-AA v2, GPT-5.6 Sol leads at 1748 vs Gemini 3.5 Flash-Lite at 1140.
Frequently asked questions
Gemini 3.5 Flash-Lite was released by Google on Jul 21 2026.
GPT-5.6 Sol was released by OpenAI on Jun 26 2026.
GPT-5.6 Sol leads on Terminal-Bench 2.1 — Gemini 3.5 Flash-Lite 54% vs GPT-5.6 Sol 88.8%.